Astrophysics and Cosmology

Astrophysics Journal Club History
Date	Room	Speaker	Title
Apr 18 2024 14:00	Room 135	Andrea Lapi (SISSA)	A small and vigorous black hole in the early Universe
ABSTRACT: https://www.nature.com/articles/s41586-024-07052-5
Apr 11 2024 14:30	Room 135	Cristiano Ugolini (SISSA)	The impact of Population III stars on the astrophysical gravitational-wave background
ABSTRACT: https://arxiv.org/pdf/2404.05653
Mar 14 2024 14:30	Room 135	Minahil Butt (SISSA)	Machine learning and structure formation in modified gravity
ABSTRACT: Link: https://arxiv.org/ftp/arxiv/papers/2305/2305.02122.pdf
Mar 14 2024 14:30	Room 135	Cecilia Sgalletta (SISSA)	Predicting the Heaviest Black Holes below the Pair Instability Gap
ABSTRACT: Link: https://arxiv.org/abs/2401.17327
Mar 07 2024 14:30	Room 135	Francesco Gabrielli (SISSA)	True PISN descendant: implications for the mass distribution of the first stars
ABSTRACT: https://arxiv.org/abs/2312.05309
Feb 29 2024 14:30	Room 135	Marcos Muniz Cueli (SISSA)	The galaxy formation origin of the lensing is low problem
ABSTRACT: https://academic.oup.com/mnras/article/521/1/937/7028805?login=true
Feb 22 2024 14:30	Room 135	Francesco Benetti (SISSA)	Dark Matter Annihilation in Ursa Major III
ABSTRACT: https://arxiv.org/abs/2311.10134\r\nhttps://arxiv.org/abs/2311.14611
Feb 15 2024 14:30	Room 135	Massimiliano Parente (SISSA)	Do Red Galaxies form more Stars than Blue Galaxies?
ABSTRACT: https://arxiv.org/abs/2402.03423
Feb 08 2024 14:30	Room 135	Francesco Addari (SISSA)	Thermal pulses with MESA: resolving the third dredge-up
ABSTRACT: Link to paper: https://ui.adsabs.harvard.edu/abs/2024MNRAS.527.9643R/abstract
Feb 01 2024 14:30	Room 135	Lumen Boco (SISSA)	Inflow and outflow properties, not total gas fractions, drive the evolution of the mass-metallicity relation
ABSTRACT: https://arxiv.org/pdf/2401.13824.pdf
Jan 25 2024 14:30	Room 135	Meriem Behiri (SISSA)	Tracing obscured galaxy build-up at high redshift using deep radio surveys
ABSTRACT: https://ui.adsabs.harvard.edu/abs/2023A%26A...678A.116A/abstract
Jan 18 2024 14:30	Room 135	Maria Vittoria Zanchettin (SISSA)	Disentangling the association of PAH molecules with star formation : Insights from JWST and UVIT
ABSTRACT: Arxiv link: https://ui.adsabs.harvard.edu/abs/2024arXiv240104061U/abstract
Jan 11 2024 14:30	Room 135	Tommaso Ronconi and Emma Dreas (SISSA)	"A Physics informed variational auto encoder for rapid galaxy inference and anomaly detection" and "Self-consistent MHD simulation of jet launching in a neutron star - white dwarf merger"
ABSTRACT: https://arxiv.org/abs/2312.16687 https://arxiv.org/abs/2310.08623
Dec 14 2023 14:30	Room 135	Claudio Ranucci (SISSA)	Crowded No More: The Accuracy of the Hubble Constant Tested with High-resolution Observations of Cepheids by JWST
ABSTRACT: https://iopscience.iop.org/article/10.3847/2041-8213/acf769
Dec 07 2023 14:30	Room 135	Mak Pavičević (SISSA)	Magnetogenesis around the first galaxies
ABSTRACT:
Nov 30 2023 14:30	Room 135	Kendall Shepherd (SISSA)	Resolving the Peak of the Black Hole Mass Spectrum
ABSTRACT:
Nov 23 2023 14:30	Room 135 and remote	Carlos Alonso Alvarez (SISSA)	On the road to precision cosmology with high-redshift H II galaxies
ABSTRACT: https://academic.oup.com/mnras/article/451/3/3001/1190266
May 12 2023 14:30	Room tbd	Tommaso Ronconi (SISSA)	Haunted haloes: tracking the ghosts of subhaloes lost by halo finders
ABSTRACT: https://ui.adsabs.harvard.edu/abs/2023arXiv230500993D/abstract
May 05 2023 14:30	Room 005 and remote	Francesco Gabrielli (SISSA)	Probing cosmic history with merging compact binaries
ABSTRACT: https://arxiv.org/abs/2303.00508
Apr 27 2023 14:30	Room 135 and remote	Alessandro Vigliano ()	A bright megaelectronvolt emission line in γ-ray burst GRB 221009A
ABSTRACT: https://arxiv.org/pdf/2303.16223.pdf.
Apr 13 2023 14:30	Room 135 and remote	Maria Vittoria Zanchettin (SISSA)	An investigation of the circumgalactic medium around z ∼ 2.2 AGN with ACA and ALMA
ABSTRACT: https://arxiv.org/pdf/2303.17488.pdf
Mar 30 2023 14:30	Room 135 and remote	Lumen Boco (SISSA)	Observational Evidence for Cosmological Coupling of Black Holes and its Implications for an Astrophysical Source of Dark Energy
ABSTRACT: https://ui.adsabs.harvard.edu/abs/2023ApJ...944L..31F/abstract
Mar 23 2023 14:30	Room 135 and remote	Mattia Mencagli (SISSA)	Eccentric black hole mergers via three-body interactions in young, globular and nuclear star clusters
ABSTRACT: https://arxiv.org/abs/2303.07421
Mar 16 2023 14:30	Room 135 and remote	Cristiano Ugolini (SISSA)	The role of natal kicks in forming asymmetric compact binary mergers
ABSTRACT: https://arxiv.org/pdf/2303.06081.pdf
Mar 09 2023 14:30	Room 135 and remote	Kendall Shepherd (SISSA)	The Search for Thermonuclear Transients from the Tidal Disruption of a White Dwarf by an Intermediate Mass Black Hole
ABSTRACT: https://arxiv.org/pdf/2302.14070.pdf
Mar 02 2023 14:30	Room 135 and remote	Kevin Wolz (SISSA)	Non-parametric analysis of the Hubble Diagram with Neural Networks
ABSTRACT: https://arxiv.org/abs/2302.12582
Feb 22 2023 14:30	Room 135 and remote	Francesco Longo (INFN Trieste)	A structured jet explains the extreme GRB 221009A
ABSTRACT: https://arxiv.org/pdf/2302.07906.pdf
Feb 16 2023 14:30	Room 135 and remote	Massimiliano Parente (SISSA)	What Causes The Formation of Disks and End of Bursty Star Formation?
ABSTRACT: https://ui.adsabs.harvard.edu/abs/2023arXiv230108263H/abstract
Feb 09 2023 14:30	Room 135 and remote	Francesca Perrotta (SISSA)	The Detection of Deuterated Water in the Large Magellanic Cloud with ALMA
ABSTRACT: https://arxiv.org/abs/2205.04325
Feb 02 2023 14:30	Room 135 and remote	Giulia Capurri (SISSA)	Solution of H0 tension with evidence of dark sector interaction from 2D BAO measurements
ABSTRACT: https://arxiv.org/abs/2301.06097
Jan 19 2023 14:30	Room 135 and remote	Marika Giulietti (SISSA)	Deep ALMA redshift search of a z 12 GLASS-JWST galaxy candidate
ABSTRACT: https://ui.adsabs.harvard.edu/abs/2022MNRAS.tmp.3515B/abstract
Jan 12 2023 14:30	Room 135	Cecilia Sgalletta (SISSA)	DeepGlow: an efficient neural-network emulator of physical afterglow models for gamma-ray bursts and gravitational-wave events
ABSTRACT: https://ui.adsabs.harvard.edu/abs/2022arXiv221210943B/abstract
Dec 15 2022 14:30	room 132	Meriem Behiri (SISSA)	What if young z > 9 JWST galaxies hosted massive black holes?
ABSTRACT: https://arxiv.org/pdf/2212.04710.pdf
Dec 01 2022 14:30	Room 130 and remote	Minahil Adil Butt (SISSA)	Cosmological Constraints from Weak Lensing Peaks: Can Halo Models Accurately Predict Peak Counts?
ABSTRACT: https://arxiv.org/abs/2109.00547
Nov 24 2022 14:30	Room 130 and remote	Jian Yao (SISSA)	Foreground-immune CMB lensing reconstruction with polarization
ABSTRACT: https://arxiv.org/abs/2211.03786
Nov 17 2022 14:30	Room 135 and remote	Francesco Addari (SISSA)	Simulating the Legacy Survey of Space and Time Stellar Content with TRILEGAL
ABSTRACT: https://arxiv.org/abs/2208.00829
May 09 2022 14:00	Online (Google Meet)	Andrea Lapi (SISSA)	A dusty compact object bridging galaxies and quasars at cosmic dawn
ABSTRACT: https://www.nature.com/articles/s41586-022-04454-1
Mar 28 2022 14:00	Online (Google Meet)	Tommaso Ronconi (SISSA)	Astrophysics JC - Main Sequence across cosmic time
ABSTRACT:
Mar 14 2022 14:00	Online (Google Meet)	Meriem Behiri and Cristiano Ugolini (SISSA)	TBD
ABSTRACT:
Feb 28 2022 14:00	Online (Google Meet)	Marika Giulietti (SISSA)	A census of optically dark massive galaxies in the early Universe from magnification by lensing galaxy clusters
ABSTRACT:
Feb 14 2022 15:30	Online (Google Meet)	Francesco Longo (INFN Trieste)	Gamma Rays from Fast Black-hole Winds
ABSTRACT:
Jan 31 2022 14:00	Online (Google Meet)	Roberta Tripodi (INAF OaTs)	Black hole feeding and star formation in NGC 1808
ABSTRACT:
Jan 17 2022 14:00	Online (Google Meet)	Matteo Nurisso (SISSA)	Black hole flares: ejection of accreted magnetic flux through 3D plasmoid-mediated reconnection
ABSTRACT:
Dec 20 2021 14:00	Online(Google Meet)	Mattia Mencagli (SISSA)	Compact Object Mergers in Hierarchical Triples from Low-Mass Young Star Clusters
ABSTRACT:
Dec 06 2021 14:00	Online (Google Meet)	Maria Vittoria Zanchettin (SISSA)	The diverse cold molecular gas contents, morphologies and kinematics of type-2 quasars as seen by ALMA
ABSTRACT:
Nov 22 2021 14:00	Online (Google Meet)	Francesco Addari (SISSA)	Gas and dust from extremely metal-poor AGB stars
ABSTRACT:
Nov 08 2021 14:00	Online (Google Meet)	Massimiliano Parente (SISSA)	Cosmic metal density evolution in neutral gas: insights from observations and cosmological simulations
ABSTRACT: The paper is available at https://ui.adsabs.harvard.edu/abs/2021MNRAS.508.3535Y/abstract
May 27 2021 15:00	Remotely	Lara Pantoni (SISSA)	Image feature extraction and galaxy classification: a novel and efficient approach with automated machine learning
ABSTRACT: https://arxiv.org/pdf/2105.01070.pdf
May 20 2021 14:00	Remotely	Andrea Lapi (SISSA)	Evidence for an intermediate-mass black hole from a gravitationally lensed gamma-ray burst
ABSTRACT: https://www.nature.com/articles/s41550-021-01307-1
May 13 2021 14:00	Remotely	Giacomo Principe (Università degli Studi di Trieste)	Broadband Multi-wavelength Properties of M87 during the2017 Event Horizon Telescope Campaign
ABSTRACT: https://arxiv.org/abs/2104.06855
May 06 2021 14:00	Remotely	Natalia Nazarova (SISSA)	Chemically Homogeneous Evolution: A rapid population synthesis approach
ABSTRACT: https://arxiv.org/abs/2010.00002
Apr 22 2021 14:00	Remotely	Tommaso Ronconi (SISSA)	A massive stellar bulge in a regularly rotating galaxy 1.2 billion years after the Big Bang
ABSTRACT: https://science.sciencemag.org/content/371/6530/713
Apr 08 2021 14:00	Remotely	Valeria Grisoni (SISSA)	The bursty origin of the Milky Way thick disc
ABSTRACT: https://ui.adsabs.harvard.edu/abs/2021arXiv210303888Y/abstract
Apr 01 2021 14:00	Remotely	Irene Burelli (Università degli Studi di Udine)	MAGIC observations of the nearby short gamma-ray burst GRB 160821B
ABSTRACT: https://ui.adsabs.harvard.edu/abs/2020arXiv201207193M/abstract
Mar 18 2021 14:00	Remotely	Matteo Nurisso (SISSA)	A fully-kinetic model for orphan gamma-ray flares in blazars
ABSTRACT: https://arxiv.org/abs/2102.11770
Feb 25 2021 14:00	Remotely	Valeria Grisoni (SISSA)	The formation history of the Milky Way disc with high-resolution cosmological simulations
ABSTRACT: https://ui.adsabs.harvard.edu/abs/2021MNRAS.502.2251G/abstract
Feb 11 2021 14:00	Remotely	Francesco Longo (INFN Trieste)	Recent detection of an extragalactic magnetar flare
ABSTRACT: 1. O.J. Roberts et al. Rapid spectral variability of a giant flare from a magnetar in NGC 253. Nature. Vol. 589, January 13, 2021, p. 207. doi: 10.1038/s41586-020-03077-8 2. D. Svinkin et al. A bright gamma-ray flare interpreted as a giant magnetar flare in NGC 253. Nature. Vol. 589, January 13, 2021, p. 211. doi: 10.1038/s41586-020-03076-9 3. The Fermi-LAT Collaboration. High-energy emission from a magnetar giant flare in the Sculptor galaxy. Nature Astronomy. Published online January 13, 2021. doi: 10.1038/s41550-020-01287-8 4. E. Burns et al. Identification of a Local Sample of Gamma-Ray Bursts Consistent with a Magnetar Giant Flare Origin, ApJL 907 L28 doi: 10.3847/2041-8213/abd8c8
Feb 04 2021 14:00		Lara Pantoni (SISSA)	Compact Molecular Gas Distribution in Quasar Host Galaxies
ABSTRACT: https://arxiv.org/pdf/2101.00764.pdf
Jan 28 2021 14:00	Remotely	Marika Giulietti (SISSA)	ALMA 1.3 mm Survey of Lensed Submillimeter Galaxies (SMGs) Selected by Herschel: Discovery of Spatially Extended SMGs and Implications
ABSTRACT: https://ui.adsabs.harvard.edu/abs/2021arXiv210103677S/abstract
Jan 14 2021 14:00	Remotely	Darko Donevski (SISSA)	https://arxiv.org/abs/2012.01433
ABSTRACT:
Dec 17 2020 14:00	Remotely	Gauri Sharma (SISSA)	TBD
ABSTRACT: https://doi.org/10.3847/1538-4357/abb0ea
Dec 03 2020 14:00	Remotely	Tommaso Ronconi (SISSA)	https://arxiv.org/abs/2011.08276
ABSTRACT:
Nov 19 2020 14:00	Remotely	Mario Spera (SISSA)	https://arxiv.org/abs/2010.14527 and https://arxiv.org/abs/2010.14533
ABSTRACT:
Nov 12 2020 14:00	Remotely	Chi T. Nguyen + Natalia Nazarova (SISSA)	https://arxiv.org/ftp/arxiv/papers/2008/2008.01633.pdf and https://arxiv.org/pdf/2009.03911.pdf
ABSTRACT:
Nov 05 2020 14:00	Remotely via zoom	Matteo Nurisso (SISSA)	https://arxiv.org/pdf/2009.08516.pdf
ABSTRACT:
Apr 09 2020 14:30	ZOOM	Matteo Nurisso (SISSA)	Unravelling the complex behavior of Mrk 421 with simultaneous X-ray and VHE observations during an extreme flaring activity in April 2013
ABSTRACT: https://arxiv.org/abs/2001.08678
Feb 13 2020 14:30	Library Red Room	Lara Pantoni (SISSA)
ABSTRACT:
Jan 30 2020 14:00	Library Red Room	Thanh (SISSA)	Weighing in on black hole binaries with BPASS: LB-1 does not contain a 70M⊙ black hole
ABSTRACT: https://arxiv.org/abs/1912.03599rnhttps://arxiv.org/abs/1912.04185
Jan 16 2020 14:30	Library Red Room	Sabyasachi Goswami (SISSA)	Are Faint Supernovae Responsible for Carbon-Enhanced Metal-Poor Stars?
ABSTRACT: https://arxiv.org/abs/2001.01420
Dec 12 2019 14:30	Library Red Room	Prof Francesco Longo (UniTs/INAF)	GRB 190114C: from prompt to afterglow?
ABSTRACT: https://www.aanda.org/articles/aa/abs/2019/06/aa35214-19/aa35214-19.html
Dec 05 2019 14:30	Library Red Room	Prof Paolo Salucci (SISSA)
ABSTRACT:
Nov 14 2019 14:30	Library Red Room	Samuele Campitiello (SISSA)	Black hole masses of weak emission line quasars based on continuum disc-fitting method
ABSTRACT: https://arxiv.org/abs/1910.06175
Sep 18 2019 14:00		Emil Mottola (Los Alamos National Laboratory)
ABSTRACT:
Mar 13 2019 14:30	Library Blue Room	Tiago Castro (UniTs/INAF)	The effect of baryons in the cosmological lensing PDFs
ABSTRACT: https://academic.oup.com/mnras/article/478/1/1305/4992327
Feb 28 2019 14:30	Library Red Room	Anirban Roy (SISSA)	Gravitational Redshift Test Using Eccentric Galileo Satellites
ABSTRACT: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.231101
Feb 14 2019 14:30	Library Red Room	Guglielmo Costa (SISSA)	The birth of the Milky Way: the in-situ halo and early thick disk as uncovered by accurate stellar ages with Gaia
ABSTRACT: https://arxiv.org/abs/1901.02900
Feb 07 2019 14:30	Library Red Room	Prof Francesco Longo ()	A γ-ray determination of the Universe\'s star-formation history
ABSTRACT: https://arxiv.org/abs/1812.01031
Jan 17 2019 14:30	Library Red Room	Gauri Sharma (SISSA)	On the absence of dark matter in dwarf galaxies surrounding the Milky Way
ABSTRACT: https://arxiv.org/pdf/1812.10714
Dec 20 2018 14:30	Library Red Room	Prof Andrea Lapi (SISSA)
ABSTRACT: https://arxiv.org/abs/1810.11490
Dec 06 2018 14:30	Library Red Room	Samuele Campitiello (SISSA)
ABSTRACT: https://arxiv.org/abs/1810.11925
Nov 22 2018 14:30	Library Red room	Lara Pantoni (SISSA)
ABSTRACT: https://arxiv.org/abs/1809.07710
Nov 08 2018 16:00	Library Red room	Sabyasachi Goswami ()
ABSTRACT: https://arxiv.org/abs/1810.10413
Jun 14 2018 14:30	Library Red Meeting Room	Francesco Longo (INFN)	An unexpected dip in the Solar Gamma-ray Spectrum
ABSTRACT: https://arxiv.org/abs/1804.06846\r\n\r\nhttps://arxiv.org/abs/1803.05436
May 31 2018 14:30	Library Red Meeting Room	Manal Yassine (INFN)	Time evolution of the spectral break in the high-energy extra component of GRB 090926A
ABSTRACT: https://www.aanda.org/articles/aa/pdf/2017/10/aa30353-16.pdf
May 29 2018 0:00	Tba	Enea Di Dio (Lawrence Berkeley National Laboratory and UC Berkeley)	Relativistic effects beyond linear theory
ABSTRACT:
May 17 2018 14:30	Library Red Meeting Room	Andrea Lapi (SISSA)
ABSTRACT: http://adsabs.harvard.edu/abs/2018MNRAS.475.3823S
May 09 2018 14:00	Tba	Maria Archidiacono (RWTH Aachen University)	Sterile neutrinos with secret interactions
ABSTRACT: The motivation for new non-standard interactions in the sterile neutrino sector arises from the tension between oscillation experiments and cosmological results. Indeed the former point towards the existence of one (or more) sterile neutrino in the eV mass range, while the latter disfavor additional fully-thermalized light particles with high statistical significance. However a partial thermalization induced by secret interactions can solve this tension, making eV sterile neutrinos fully consistent with big bang nucleosynthesis, cosmic microwave background and large scale structure constraints.rnrnIn this talk I will present a pseudoscalar model of secret interactions which provides a simple and elegant way of reconciling eV sterile neutrinos with precision cosmology. I will also mention how the hidden interactions can be extended to the dark matter sector and might mitigate the small scale problems of the standard cold dark matter paradigm.
Apr 14 2018 0:00	Library Red Meeting Room	Tommaso Ronconi (SISSA)	Diversity of the Lyman continuum escape fractions of high-z galaxies and its origins
ABSTRACT: https://arxiv.org/abs/1711.05070v1
Mar 01 2018 14:30	Library Red Meeting Room	Giovanni Mirouh (SISSA)	Empirical, Accurate Masses and Radii of Single Stars with TESS and Gaia
ABSTRACT: http://adsabs.harvard.edu/abs/2018AJ....155...22S
Feb 15 2018 14:30	Library Red Meeting Room	Chiara Di Paolo (SISSA)	Galaxy Formation in Sterile Neutrino Dark Matter Models
ABSTRACT: https://arxiv.org/abs/1801.03697
Feb 01 2018 14:30	Library Red Meeting Room	Elias Kammoun (SISSA)	Is there a UV/X-ray connection in IRAS 13224�3809?
ABSTRACT: https://arxiv.org/abs/1712.06606v1
Jun 29 2017 0:00		Valerio Faraoni (Bishop\'s University, Sherbrooke, Canada)	Quasilocal energy made practical
ABSTRACT: The rather formal concept of quasilocal energy can be applied to cosmology. The first application is to simulations of large scale structures, which are Newtonian even though the size of the box used exceeds the Hubble radius. The Hawking mass splits into a \"Newtonian\" local part and a \"relativistic\" part due to the cosmological background. The Newtonian part quickly comes to dominate, supporting the validity of Newtonian simulations. The same splitting is then applied to the turnaround radius of a large structure in the accelerated era, introducing a correction and a clarification of the \"mass\" concept used in previous literature. Finally, the splitting is applied to the old debate on lensing by the cosmological constant. The Brown-York quasilocal energy produces the same results.
Apr 06 2017 15:30	Library red reading room	Andrej Obuljen (SISSA)	A direct localization of a fast radio burst and its host
ABSTRACT:
Mar 30 2017 14:30	Library red reading room	Elias Kammoun (SISSA)	The response of relativistic outflowing gas to the inner accretion disk of a black hole
ABSTRACT:
Feb 23 2017 14:30	Library Red Reading Room	Francesco Longo (INFN - Trieste)	Fermi-LAT Observations of High-energy Behind-the-limb Solar Flares
ABSTRACT:
Feb 09 2017 14:30	Library Red Reading Room	Giuseppe Puglisi (SISSA)	The dipole repeller
ABSTRACT:
Dec 15 2016 14:30	Library Red Reading Room	Milena Valentini (SISSA)	Increasing black hole feedback induced quenching with anisotropic thermal conduction
ABSTRACT:
Nov 30 2016 14:30	Library Red Reading Room	Elias Kammoun (SISSA)	A global look at X-ray time lags in Seyfert Galaxies
ABSTRACT:
Nov 16 2016 14:30	Library Red Reading Room	Gor Oganesyan (SISSA)	T.B.A.
ABSTRACT:
Jun 09 2016 14:30	red library meeting room	Xiaoting Fu;Claudia Mancuso (SISSA-ISAS;SISSA-ISAS)	tba
ABSTRACT:
May 19 2016 14:30	red library meeting room	Andrej Obuljen; Viviana Gammaldi (SISSA-ISAS;SISSA-ISAS)	tba
ABSTRACT:
May 05 2016 14:30	red library meeting room	Ikechukwu Antony Obi; Milena Valentini (SISSA-ISAS;SISSA-ISAS)	tba
ABSTRACT:
Apr 21 2016 14:30	red library meeting room	Francesca Lepori; Alessandro Trani (SISSA-ISAS;SISSA-ISAS)	tba
ABSTRACT:
Apr 07 2016 14:30	Red library meeting room	Gor Oganesyan; Giuseppe Puglisi (SISSA-ISAS;SISSA-ISAS)	tba
ABSTRACT:
Mar 24 2016 14:30	Red library meeting room	Serena Perrotta; Elias Kammoun (SISSA-ISAS;SISSA-ISAS)	tba
ABSTRACT:
Mar 10 2016 14:00	Red library meeting room	Ekaterina Kaurkes; Jingjing Shi (SISSA-ISAS;SISSA-ISAS)	WHERE ARE MOST OF THE GLOBULAR CLUSTERS IN TODAY�S UNIVERSE?;Extremely metal-poor stars from the cosmic dawn in the bulge of the Milky Way
ABSTRACT:
Feb 25 2016 14:00	red library meeting room	Paolo Salucci (SISSA-ISAS)
ABSTRACT:
Feb 11 2016 14:30	red library meeting room	Ikechukwu Antony Obi; Andrej Obuljen ()
ABSTRACT:
Jan 28 2016 14:30	library red meeting room	Serena Perrotta; Milena Valentini (SISSA-ISAS)
ABSTRACT:
Jan 21 2016 14:00	library red meeting room	Andrej Obuljen; Alessandro Trani (SISSA-ISAS)
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Jan 14 2016 14:00	library blue meeting room	Francesca Lepori; Ikechukwu Antony Obi (SISSA-ISAS)
ABSTRACT:
Nov 26 2015 14:00	library red meeting room	Gor Oganesyan; Giuseppe Puglisi (SISSA-ISAS)
ABSTRACT:
Nov 12 2015 14:00	library blue meeting room	Elias Kammoun; Paolo Salucci (SISSA-ISAS)
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Oct 29 2015 14:00	library red meeting room	Ekaterina Karukes, Jingjing Shi (SISSA, SISSA)	A giant protogalactic disk linked to the cosmic web; Flows of X-ray gas reveal the disruption of a star by a massive black hole
ABSTRACT:
Oct 15 2015 2:00		FU, Xiaoting, Claudia Mancuso (SISSA, SISSA)	Fast-moving features in the debris disk around AU Microscopii; The Formation of Submillimetre-Bright Galaxies from Gas Infall over a Billion Years
ABSTRACT:
Mar 25 2015 14:00	big meeting room 7th floor	Xiaoting Fu (SISSA)	Rings and Radial Waves in the Disk of the Milky Way
ABSTRACT: We show that in the anticenter region, between Galactic longitudes of 110∘
Mar 11 2015 14:00	big meeting room 7th floor	Giuseppe Puglisi (SISSA)	Searching for Inflationary B-modes: Can dust emission properties be extrapolated from 350 GHz to 150 GHz?
ABSTRACT: Recent Planck results have shown that the path to isolating an inflationary B-mode signal in microwave polarization passes through understanding and modeling the in- terstellar dust polarized emission foreground, even in regions of the sky with the lowest level of dust emission. One of the most commonly used ways to remove the dust fore- ground is to extrapolate the polarized dust emission signal from frequencies where it dominates (e.g., ∼350 GHz) to frequencies commonly targeted by cosmic microwave background experiments (e.g., ∼150 GHz). We show, using a simple 2-cloud model, that if more than one cloud is present along the line-of-sight, with even mildly different temperature and dust column density, but severely misaligned magnetic field, then the 350 GHz polarized sky map is not predictive of that at 150 GHz. This problem is in- trinsic to all microwave experiments and is due to information loss due to line-of-sight integration. However, it can be alleviated through interstellar medium tomography: a reconstruction of the dust column and magnetic fields at different distances, which could be achieved through the measurement of dust-absorption�induced polarization properties of starlight from stars at known distances in the optical and infrared.
Feb 25 2015 14:00	big meeting room 7th floor	JingJing Shi (SISSA)	The galaxy-halo connection from a joint lensing, clustering and abundance analysis in the CFHTLenS/VIPERS field
ABSTRACT: We present new constraints on the relationship between galaxies and their host dark matter halos, measured from the location of the peak of the stellar-to-halo mass ra- tio (SHMR), up to the most massive galaxy clusters at redshift z ∼ 0.8 and over a volume of nearly 0.1 Gpc3. We use a unique combination of deep observations in the CFHTLenS/VIPERS field from the near-UV to the near-IR, supplemented by ∼ 60000 secure spectroscopic redshifts, analysing galaxy clustering, galaxy-galaxy lensing and the stellar mass function. We interpret our measurements within the halo occupation distribution (HOD) framework, separating the contributions from cen- tral and satellite galaxies. We find that the SHMR for the central galaxies peaks at Mh,peak = 1.9+0.2 � 1012M⊙ with an amplitude of 0.025, which decreases to ∼ 0.001 −0.1 for massive halos (Mh > 1014M⊙). Compared to central galaxies only, the total SHMR (including satellites) is boosted by a factor 10 in the high-mass regime (cluster-size halos), a result consistent with cluster analyses from the literature based on fully in- dependent methods. After properly accounting for differences in modelling, we have compared our results with a large number of results from the literature up to z = 1: we find good general agreement, independently of the method used, within the typical stellar-mass systematic errors at low to intermediate mass (M⋆ < 1011M⊙) and the statistical errors above. We have also compared our SHMR results to semi-analytic simulations and found that the SHMR is tilted compared to our measurements in such a way that they over- (under-) predict star formation efficiency in central (satellite) galaxies.
Feb 11 2015 14:00	big meeting room 7th floor	Xioating Fu (SISSA)	A POSSIBLE EXTENSION OF THE SCUTUM-CENTAURUS ARM INTO THE OUTER SECOND QUADRANT
ABSTRACT: Combining H i data from the Canadian Galactic Plane Survey and CO data from the Milky Way Imaging Scroll Painting project, we have identified a new segment of a spiral arm between Galactocentric radii of 15 and 19 kpc that apparently lies beyond the Outer Arm in the second Galactic quadrant. Over most of its length, the arm is 400�600 pc thick in z. The new arm appears to be the extension of the distant arm recently discovered by Dame & Thaddeus as well as the Scutum�Centaurus Arm into the outer second quadrant. Our current survey identified a total of 72 molecular clouds with masses on the order of 102�104 M⊙ that probably lie in the new arm. When all of the available data from the CO molecular clouds are fit, the best-fitting spiral model gives a pitch angle ◦◦ of 9.3 � 0.7.
Jan 28 2015 14:00	big meeting room 7th floor	Ekaterina Karukes (SISSA)	"Expanded haloes, abundance matching and too-big-to-fail in the Local Group"
ABSTRACT: Observed kinematical data of 40 Local Group members are used to derive the dark matter halo mass of such galaxies. Haloes are selected from the theoretically expected Local Group mass function and two different density profiles are assumed, the standard NFW model and a mass dependent profile which accounts for the effects of baryons in modifying the dark matter distribution within galaxies. The resulting relations between stellar and halo mass are compared with expectations from abundance matching. Using the NFW profile, the ensemble of Local Group galaxies is generally fit in relatively low mass haloes, leaving dark many massive haloes of Mhalo>10^10Msun: this reflects the "too big to fail" problem in the Local Group and results in a Mstar-Mhalo relation that differs from abundance matching predictions. Moreover, the star formation efficiency of isolated Local Group galaxies increases with decreasing halo mass when adopting a NFW model. By contrast, using the mass dependent density profile, relatively high stellar mass (Mstar>10^6Msun) dwarf galaxies are assigned to more massive haloes, which have a central cored distribution of dark matter: the "too big to fail" problem is alleviated, the resultant Mstar-Mhalo relation follows abundance matching predictions down to the completeness limit of current surveys, and the star formation efficiency of isolated members decreases with decreasing halo mass, in agreement with theoretical expectations. Several low mass (Mstar<10^6Msun) satellite galaxies are best fit to lower mass haloes than expected from the extrapolation of abundance matching relations, which may result from environmental effects, a scenario favored by the fact that no isolated galaxies fall in this region. Finally, the cusp/core space of Local Group galaxies is presented, providing a framework to understand the non-universality of their density profiles.
Jan 14 2015 14:00	blue library meeting room	Yang Chen (SISSA)	Stars as resonant absorbers of gravitational waves, http://arxiv.org/abs/1405.1414
ABSTRACT: Quadrupole oscillation modes in stars can resonate with incident gravitational waves (GWs), and grow non-linear at the expense of GW energy. Stars near massive black hole binaries (MBHB) can act as GW-charged batteries, cooling radiatively. Mass-loss from these stars can prompt MBHB accretion at near-Eddington rates. GW opacity is independent of amplitude, so distant resonating stars can eclipse GW sources. Absorption by the Sun of GWs from Galactic white dwarf binaries may be detectable with second-generation space-based GW detectors as a shadow within a complex diffraction pattern.
Nov 26 2014 14:00	big Meeting Room 7th floor	Claudia Mancuso (SISSA)	Confirming the Quiescent Galaxy Population out to z=3: A Stacking Analysis of Mid-, Far-Infrared and Radio Data
ABSTRACT: We present stringent constraints on the average mid-, far-infrared and radio emissions of ∼14200 quiescent galaxies (QGs), identified out to z=3 in the COSMOS field via their rest-frame NUV−r and r−J colors, and with stellar masses M⋆=109.8−12.2M⊙. Stacking in deep Spitzer (MIPS 24μm), Herschel (PACS and SPIRE), and VLA (1.4 GHz) maps reveals extremely low dust-obscured star formation rates for QGs (SFR <0.1−3M⊙yr−1 at z⩽2 and <6−18M⊙yr−1 at z>2), consistent with the low unobscured SFRs (<0.01−1.2M⊙yr−1) inferred from modeling their ultraviolet-to-near-infrared photometry. The average SFRs of QGs are >10� below those of star-forming galaxies (SFGs) within the M⋆- and z-ranges considered. The stacked 1.4 GHz signals (S/N >5) are, if attributed solely to star formation, in excess of the total (obscured plus unobscured) SFR limits, suggestive of a widespread presence of low-luminosity active galactic nuclei (AGN) among QGs. Our results reaffirm the existence of a significant population QGs out to z=3, thus corroborating the need for powerful quenching mechanism(s) to terminate star formation in galaxies at earlier epochs.
Nov 12 2014 14:00	Big Meeting Room 7th floor	Serena Perrotta (SISSA)	Fast cold gas in hot AGN outflows
ABSTRACT: Observations of the emission from spatially extended cold gas around bright high-redshift QSOs reveal surprisingly large velocity widths exceeding 2000 km s^(-1), out to projected distances as large as 30 kpc. The high velocity widths have been interpreted as the signature of powerful AGN-driven outflows. Naively, these findings appear in tension with hydrodynamic models in which AGN-driven outflows are energy-driven and thus very hot with typical temperatures T = 10^6-7 K. Using the moving-mesh code Arepo, we perform 'zoom-in' cosmological simulations of a z = 6 QSO and its environment, following black hole growth and feedback via energy-driven outflows. In the simulations, the QSO host galaxy is surrounded by a clumpy circum-galactic medium pre-enriched with metals due to supernovae-driven galactic outflows. As a result, part of the AGN-driven hot outflowing gas can cool radiatively, leading to large amounts (> 10^9 M_sun) of cold gas comoving with the hot bipolar outflow. This results in velocity widths of spatially extended cold gas similar to those observed. We caution, however, that gas inflows, random motions in the deep potential well of the QSO host galaxy and cooling of supernovae-driven winds contribute significantly to the large velocity width of the cold gas in the simulations, complicating the interpretation of observational data.
Oct 29 2014 14:00	Big Meeting Room 7th floor	Jing Tang (SISSA)	Inefficient Star Formation In Extremely Metal Poor Galaxies
ABSTRACT: The first galaxies contain stars born out of gas with little or no metals. The lack of metals is expected to inhibit efficient gas cooling and star formation but this effect has yet to be observed in galaxies with oxygen abundance relative to hydrogen below a tenth of that of the Sun. Extremely metal poor nearby galaxies may be our best local laboratories for studying in detail the conditions that prevailed in low metallicity galaxies at early epochs. Carbon Monoxide (CO) emission is unreliable as tracers of gas at low metallicities, and while dust has been used to trace gas in low-metallicity galaxies, low-spatial resolution in the far-infrared has typically led to large uncertainties. Here we report spatially-resolved infrared observations of two galaxies with oxygen abundances below 10 per cent solar, and show that stars form very inefficiently in seven star-forming clumps of these galaxies. The star formation efficiencies are more than ten times lower than found in normal, metal rich galaxies today, suggesting that star formation may have been very inefficient in the early Universe.
Oct 15 2014 14:00	Library Blue Meeting Room	Veronica Biffi (SISSA)	An elongated iron-rich structure in the core of the group NGC4325
ABSTRACT: We used X-ray 2D spectrally resolved maps to resolve structure in temperature and metal abundance. To perform stellar population analysis we applied the spectral fitting technique with STARLIGHT to the optical spectrum of the central galaxy. To simulate the chemical evolution of the central galaxy we adopted the codes of Lanfranchi & Matteucci (2003,2004) While the temperature, pseudo-pressure and pseudo-entropy maps showed no inhomogeneities, the iron spatial distribution shows a filamentary structure in the core of this group, which is spatially correlated with the central galaxy, suggesting a connection between the two. The analysis of the optical spectrum of the central galaxy showed no contribution of any recent AGN activity. Using the star formation history as an input to chemical evolution models, we predicted the iron and oxygen mass released by supernovae (SNe) winds in the central galaxy up to the present time. Comparing the predicted amount of mass released by the NGC4325 galaxy to the ones derived through X-ray analysis we conclude that the winds from the central galaxy alone play a minor role in the IGM metal enrichment of this group inside r2500. The SNe winds are responsible for not more than 3% and of the iron mass and 21% of the oxygen mass enclosed within r2500. Our results suggest that oxygen has been produced in the early stages of the group formation, becoming well mixed and leading to an almost flat profile. Instead, the iron distribution is centrally peaked indicating that this element is still being added to the IGM specifically in the core by the SNIa. A possible scenario to explain the elongated iron-rich structure in the core of the NGC4325 is a past AGN activity, in which our results suggest an episode older than ~10^7-10^8 yrs and younger than 5x10^8
Oct 08 2014 14:00	big meeting room 7th floor	Sandra Raimundo (SISSA,SISSA)	The ancient heritage of water ice in the solar system
ABSTRACT: Identifying the source of Earth's water is central to understanding the origins of life-fostering environments and to assessing the prevalence of such environments in space. Water throughout the solar system exhibits deuterium-to-hydrogen enrichments, a fossil relic of low-temperature, ion-derived chemistry within either (i) the parent molecular cloud or (ii) the solar nebula protoplanetary disk. Utilizing a comprehensive treatment of disk ionization, we find that ion-driven deuterium pathways are inefficient, curtailing the disk's deuterated water formation and its viability as the sole source for the solar system's water. This finding implies that if the solar system's formation was typical, abundant interstellar ices are available to all nascent planetary systems.
Oct 01 2014 14:00	Big Meeting Room 7th floor	Juan Manuel Carmona-Loaiza (SISSA)	Time-resolved infrared emission from radiation-driven central obscuring structures in Active Galactic Nuclei; GIZMO: A New Class of Accurate, Mesh-Free Hydrodynamic Simulation Methods
ABSTRACT: Time-resolved infrared emission from radiation-driven central obscuring structures in Active Galactic Nuclei: The central engines of Seyfert galaxies are thought to be enshrouded by geometrically thick gas and dust structures. In this article, we derive observable properties for a self-consistent model of such toroidal gas and dust distributions, where the geometrical thickness is achieved and maintained with the help of X-ray heating and radiation pressure due to the central engine. Spectral energy distributions (SEDs) and images are obtained with the help of dust continuum radiative transfer calculations with RADMC-3D. For the first time, we are able to present time-resolved SEDs and images for a physical model of the central obscurer. Temporal changes are mostly visible at shorter wavelengths, close to the combined peak of the dust opacity as well as the central source spectrum and are caused by variations in the column densities of the generated outflow. Due to the three-component morphology of the hydrodynamical models -- a thin disc with high density filaments, a surrounding fluffy component (the obscurer) and a low density outflow along the rotation axis -- we find dramatic differences depending on wavelength: whereas the mid-infrared images are dominated by the elongated appearance of the outflow cone, the long wavelength emission is mainly given by the cold and dense disc component. Overall, we find good agreement with observed characteristics, especially for those models, which show clear outflow cones in combination with a geometrically thick distribution of gas and dust, as well as a geometrically thin, but high column density disc in the equatorial plane. ----------------------------------------------------------------------------- GIZMO: A New Class of Accurate, Mesh-Free Hydrodynamic Simulation Methods: We present and study two new Lagrangian numerical methods for solving the equations of hydrodynamics, in a systematic comparison with moving-mesh, SPH, and non-moving grid methods. The new methods are designed to capture many advantages of both smoothed-particle hydrodynamics (SPH) and grid-based or adaptive mesh refinement (AMR) schemes. They are based on a kernel discretization of the volume coupled to a high-order matrix gradient estimator and a Riemann solver acting over the volume 'overlap.' We implement and test a parallel, second-order version of the method with coupled self-gravity & cosmological integration, in the code GIZMO: this maintains exact mass, energy and momentum conservation; exhibits superior angular momentum conservation compared to all other methods we study; does not require 'artificial diffusion' terms; and allows fluid elements to move with the flow so resolution is automatically adaptive. We consider a large suite of test problems, and find that on all problems the new methods appear competitive with moving-mesh schemes, with some advantages (particularly in angular momentum conservation), at the cost of enhanced noise. The new methods have many advantages vs. SPH: proper convergence, good capturing of fluid-mixing instabilities, dramatically reduced 'particle noise' & numerical viscosity, more accurate sub-sonic flow evolution, & sharp shock-capturing. Advantages vs. non-moving meshes include: automatic adaptivity, dramatically reduced advection errors & numerical diffusion, velocity-independence of errors, accurate coupling to N-body gravity solvers, good angular momentum conservation, and elimination of 'grid alignment' effects. We can, for example, follow hundreds of orbits of gaseous disks, while AMR and SPH methods break down in a few orbits. All of these differences are important for a wide range of astrophysical problems.
Sep 17 2014 14:00	Library Blue Meeting Room	Sandra Raimundo & Xiaoting Fu (SISSA)	The role of bars in AGN fueling in disk galaxies over the last seven billion years; The diversity of quasars unified by accretion and orientation
ABSTRACT:
Jul 30 2014 14:00	Library Red Meeting Room	Claudia Mancuso (SISSA)	Merging galaxies and their properties
ABSTRACT: Galaxy and Mass Assembly (GAMA): merging galaxies and their properties http://adsabs.harvard.edu/abs/2014arXiv1407.4996D
Jul 16 2014 14:00	Big Meeting Room 7th floor	Gianluca Castignani (SISSA)	High redshift cluster candidates
ABSTRACT: Cluster candidates around low power radio-galaxies at z~1-2 in COSMOS http://adsabs.harvard.edu/abs/2014arXiv1406.5255C A new method to search for high redshift clusters using photometric redshifts http://adsabs.harvard.edu/abs/2014arXiv1405.7973C
Jul 02 2014 14:00	Big Meeting Room 7th floor	Sandra Raimundo (SISSA)	A triple supermassive black hole system
ABSTRACT: A close-pair binary in a distant triple supermassive black-hole system http://arxiv.org/abs/1406.6365
Jun 18 2014 14:00	Big Meeting Room 7th floor	Xiaoting Fu and Sandra Raimundo (SISSA)	Milky Way satellites, binary stars and the Mice major merger
ABSTRACT: The Alpha-element knee of the Sagittarius Stream http://arxiv.org/abs/1406.3352 The binarity of Milky Way F,G,K stars as a function of effective temperature and metallicity http://arxiv.org/abs/1405.7105 The Mice at play in the CALIFA survey: A case study of a gas-rich major merger between first passage and coalescence http://arxiv.org/abs/1405.7814
Jun 11 2014 14:00	Big Meeting Room 7th floor	Yang Chen (SISSA)	Offset AGN
ABSTRACT: Offset Active Galactic Nuclei as Tracers of Galaxy Mergers and Supermassive Black Hole Growth http://arxiv.org/abs/1405.6711
Jun 03 2014 14:00	Big Meeting Room	Yang Chen ()
ABSTRACT:
May 20 2014 14:00	Big Meeting Room	Jing Tang and Juan Loaiza (SISSA)	Star formation histories in local dwarf galaxies and the Illustris Simulation
ABSTRACT: The Star Formation Histories of Local Group Dwarf Galaxies II. Searching For Signatures of Reionization http://arxiv.org/abs/1405.3281 The Illustris Simulation: the evolution of galaxy populations across cosmic time http://adsabs.harvard.edu/abs/2014arXiv1405.3749G
May 07 2014 14:00	Big Meeting Room	Serena Perrotta and Sandra Raimundo (SISSA)	AGN feedback in groups and clusters; 40 years of Mrk 590
ABSTRACT: Can AGN Feedback Break the Self-similarity of Galaxies, Groups, and Clusters? http://adsabs.harvard.edu/abs/2014ApJ...783L..10G AGN Type-casting: Mrk 590 No Longer Fits the Role http://arxiv.org/abs/1404.4879
Apr 09 2014 14:00	Big Meeting Room 7th floor	Juan M. C. Loaiza (SISSA)	How the central black hole may shape its host galaxy through AGN feedback
ABSTRACT: http://arxiv.org/abs/1404.0908
Mar 26 2014 14:00	Big Meeting Room 7th floor	Rossella Aversa (SISSA)	Predicting Galaxy Star Formation Rates via the Co-evolution of Galaxies and Halos
ABSTRACT: http://arxiv.org/abs/1403.1578
Mar 12 2014 14:00	Big Meeting Room 7th floor	Veronica Biffi and Andrea Lapi (SISSA)	Gas sloshing and emission lines in galaxy clusters, X-ray emission from a lensed quasar
ABSTRACT: Large scale gas sloshing out to half the virial radius in the strongest cool core REXCESS galaxy cluster, RXJ2014.8-2430 http://arxiv.org/abs/1402.6894 Detection of An Unidentified Emission Line in the Stacked X-ray spectrum of Galaxy Clusters http://arxiv.org/abs/1402.2301 Reflection from the strong gravity regime in a lensed quasar at redshift z = 0.658 http://www.nature.com/nature/journal/vaop/ncurrent/full/nature13031.html
Feb 26 2014 14:00	Library Red Meeting Room	Xiaoting Fu, Juan Manuel Loaiza, Sandra Raimundo (SISSA)	Protoplanetary discs, simulations of galaxy mergers and the galaxy green valley
ABSTRACT: Millimetre spectral indices of transition disks and their relation with the cavity radius http://arxiv.org/abs/1402.5778 Nuclear coups: dynamics of black holes in galaxy mergers: http://adsabs.harvard.edu/doi/10.1093/mnras/stu024 The Green Valley is a Red Herring: http://arxiv.org/abs/1402.4814
Feb 12 2014 14:00	Big Meeting Room	Ekaterina Karukes (SISSA)	First Results from the Dragonfly Telephoto Array
ABSTRACT: First Results from the Dragonfly Telephoto Array: The Apparent Lack of a Stellar Halo in the Massive Spiral Galaxy M101: http://adsabs.harvard.edu/abs/2014ApJ...782L..24V
Jan 29 2014 14:00	Big Meeting Room	Claudia Mancuso and Sandra Raimundo (SISSA)	The most luminous local infrared galaxy and observing the cosmic web
ABSTRACT: Herschel observations and a model for IRAS 08572+3915: a candidate for the most luminous infrared galaxy in the local (z < 0.2) Universe http://adsabs.harvard.edu/abs/2014MNRAS.437L..16E A cosmic web filament revealed in Lyman-alpha emission around a luminous high-redshift quasar http://arxiv.org/abs/1401.4469
Jan 15 2014 14:00	Library Red Meeting Room	Sandra Raimundo and Juan Manuel Loaiza (SISSA)	AGN obscuration and double peaked AGN
ABSTRACT: The incidence of obscuration in AGN http://adsabs.harvard.edu/abs/2014MNRAS.437.3550M A sub-kpc-scale binary AGN with double narrow-line regions http://arxiv.org/abs/1401.3042
Dec 04 2013 14:00	Library Red Meeting Room	Xiaoting Fu (SISSA)	The mass metallicity relation for dwarf galaxies
ABSTRACT: The Universal Stellar Mass-Stellar Metallicity Relation for Dwarf Galaxies http://arxiv.org/abs/1310.0814
Nov 20 2013 14:00	Library Red Meeting Room	Yang Chen (SISSA)	Metal enrichment in clusters
ABSTRACT: A uniform metal distribution in the intergalactic medium of the Perseus cluster of galaxies http://www.nature.com/nature/journal/v502/n7473/full/nature12646.html
Nov 06 2013 14:00	Big Meeting Room	Juan Manuel Loaiza (SISSA)	The most distant galaxy spectroscopically confirmed
ABSTRACT: A Rapidly Star-forming Galaxy 700 Million Years After the Big Bang at z=7.51 http://arxiv.org/abs/1310.6031v1
Oct 24 2013 14:00	Big Meeting Room	Rossella Aversa, Ranieri Baldi and Sandra Raimundo ()	AGN clustering and a conference summary
ABSTRACT: Clustering Measurements of broad-line AGNs: Review and Future http://arxiv.org/abs/1308.5976 Summary of the AGN IAU symposium in Yerevan New observational Constraints on the Growth of the First Supermassive Black Holes http://adsabs.harvard.edu/abs/2013arXiv1310.2249T
Oct 10 2013 15:00	Library Red Meeting Room	Heng Hao (SISSA)	Spectral energy distributions and Optical Variability
ABSTRACT: Multi-Wavelength SEDs of Herschel Selected Galaxies in the COSMOS Field http://arxiv.org/abs/1310.0474 A Search for Optical Variability of Type 2 Quasars in SDSS Stripe 82 http://arxiv.org/abs/1310.0874
Sep 25 2013 14:00	Library Blue Meeting Room	Veronica Biffi (SISSA)	Baryonic, chemical and dynamical properties of proto-galaxies
ABSTRACT: Statistical properties of mass, star formation, chemical content and rotational patterns in early z > 9 structures http://arxiv.org/abs/1309.2283
Sep 11 2013 14:00	Library Blue Meeting Room	Ranieri Baldi and Sandra Raimundo (SISSA)	Massive Molecular Outflow in a BCG and LINER galaxies
ABSTRACT: A Ten Billion Solar Mass Outflow of Molecular Gas Launched by Radio Bubbles in the Abell 1835 Brightest Cluster Galaxy http://arxiv.org/abs/1309.0013 The nature of LINER galaxies: Ubiquitous hot old stars plus rare accreting black holes http://arxiv.org/abs/1308.4271
Jul 24 2013 14:00	Library Red Meeting Room	Sandra Raimundo (SISSA)	Orbital decay of black hole pairs
ABSTRACT: Massive black hole pairs in clumpy, self-gravitating circumnuclear disks: stochastic orbital decay http://arxiv.org/abs/1307.0822
Jul 10 2013 14:00	Room 135	Ambra Nanni and Sandra Raimundo (SISSA)	The Star Formation Law and the Polar AGN IR emission
ABSTRACT: The Origin of Physical Variations in the Universal Star Formation Law http://arxiv.org/abs/1307.1467 Dust in the polar region as a major contributor to the IR emission of AGN http://arxiv.org/abs/1306.4312
Jun 26 2013 14:00	Library Red Meeting Room	Gianluca Castignani (SISSA)	Estimating redshift distributions with spatial correlations
ABSTRACT: Estimating redshift distributions with spatial correlations: method and application to data http://adsabs.harvard.edu/abs/2013arXiv1303.4722M Recovering redshift distributions with cross-correlations: pushing the boundaries http://adsabs.harvard.edu/abs/2013MNRAS.431.3307S
Jun 13 2013 14:00	Library Blue Meeting Room	Heng Hao and Juan Manuel Loaiza (SISSA)	A high-z dust obscured galaxy; AGN outflows
ABSTRACT: A Dust-Obscured Massive Maximum-Starburst Galaxy at a Redshift of 6.34 http://arxiv.org/abs/1304.4256 AGN outflows trigger starbursts in gas-rich galaxies http://arxiv.org/abs/1306.0684
May 29 2013 14:00	Library Red Meeting Room	Yang Chen and Sandra Raimundo (SISSA)	Dust in nearby galaxies; Cataclysmic variables
ABSTRACT: Mapping dust through emission and absorption in nearby galaxies http://arxiv.org/abs/1305.2923 An accurate geometric distance to the compact binary SS Cygni vindicates accretion disc theory http://arxiv.org/abs/1305.5846
May 17 2013 14:00	Library Red Meeting Room	Juan Manuel Loaiza (SISSA)	Supermassive Black Hole Formation via Direct Collapse
ABSTRACT: Supermassive Black Hole Formation at High Redshifts via Direct Collapse: Physical Processes in the Early Stage http://arxiv.org/abs/1304.1369
May 02 2013 15:30	Library Blue Meeting Room	Rossella Aversa (SISSA)	Black Hole scaling relations
ABSTRACT: The strong environmental dependence of black hole scaling relations http://adsabs.harvard.edu/abs/2013arXiv1302.6237M
Apr 19 2013 14:00	Library Red Meeting Room	Ranieri Baldi and Sandra Raimundo (SISSA)	Local radio AGN and Seyfert/Quiescent galaxies comparison
ABSTRACT: The relation between morphology, accretion modes and environmental factors in local radio AGN http://adsabs.harvard.edu/abs/2013MNRAS.430.3086G Fueling AGN-I: How the Global Characteristics of the Central Kiloparsec of Seyferts differ from Quiescent Galaxies http://arxiv.org/abs/1303.4399
Apr 03 2013 14:30	Library Red Meeting Room	Zhenyi Cai (SISSA)	Simulations of black hole and galaxy growth
ABSTRACT: Black Hole-Galaxy Correlations without Self-Regulation http://arxiv.org/abs/1303.5058
Mar 20 2013 14:30	Library Red Meeting Room	Ambra Nanni and Juan Manuel Loaiza (SISSA)	Dust in the early Universe and Obese Black Holes
ABSTRACT: The Origin of Dust in the Early Universe: Probing the Star Formation History of Galaxies by their Dust Content http://arxiv.org/abs/1011.1303 Unravelling obese black holes in the first galaxies http://arxiv.org/abs/1302.6996
Mar 06 2013 14:30	Library Red Meeting Room	Sandra Raimundo (SISSA)	A recoiling black hole?
ABSTRACT: A Captured Runaway Black Hole in NGC 1277? http://adsabs.harvard.edu/abs/2013arXiv1302.4458S
Feb 20 2013 14:30	Library Red Meeting Room	Heng Hao and Ranieri Baldi (SISSA)	AGN - Infrared, X-ray and Radio properties
ABSTRACT: Infrared and X-ray selection of AGN http://arxiv.org/abs/1302.2920 Star formation and dust in radio galaxies http://adsabs.harvard.edu/abs/2013MNRAS.429.2407H
Feb 06 2013 14:30	Library Red Meeting Room	Gianluca Castignani (SISSA)	Black Hole mass measurements
ABSTRACT: Measuring the black hole mass in quasars: http://adsabs.harvard.edu/abs/2012MNRAS.427.3081T
Jan 22 2013 14:30	Library Red Meeting Room	Eolo di Casola and Sandra Raimundo (SISSA)	Cosmology and an Ultramassive Black Hole
ABSTRACT: An expanding Universe without Dark Matter and Dark Energy: http://arxiv.org/abs/1212.1110 X-ray emission from NGC 1277: an ultramassive black hole http://adsabs.harvard.edu/abs/2013arXiv1301.1800F
Jan 10 2013 14:00	Library Red Meeting Room	Yang Chen (SISSA)	A grand design spiral
ABSTRACT: High velocity dispersion in a rare grand-design spiral galaxy at redshift z = 2.18 http://www.nature.com/nature/journal/v487/n7407/full/nature11256.html
Dec 04 2012 14:00	Library Red Meeting Room	Juan Manuel Loaiza and Sandra Raimundo (SISSA)	Black Hole spin and mass
ABSTRACT: Black hole spin evolution: http://adsabs.harvard.edu/abs/2012arXiv1211.4871D An over-massive black hole: http://adsabs.harvard.edu/abs/2012Natur.491..729V
Nov 21 2012 14:00	Big Meeting Room	Sandra Raimundo, Juan Manuel Loaiza, Ambra Nanni (SISSA)	AGN feedback, star formation and a z=11 galaxy
ABSTRACT: Summary of the conference: Nuclei of Seyfert galaxies and QSOs - Central engine & conditions of star formation. The star formation rate of X-ray selected AGN: http://adsabs.harvard.edu/abs/2012A%26A...545A..45R. Simulations of black hole feedback: http://adsabs.harvard.edu/abs/2010MNRAS.402..789N. NASA press release on z = 11 galaxy candidate: http://adsabs.harvard.edu/abs/2012arXiv1211.3663C.
Nov 06 2012 14:00	Library Red Meeting Room	Rossella Aversa (SISSA)
ABSTRACT:
Oct 23 2012 14:00	Library Red Meeting Room	Ranieri Baldi and Sandra Raimundo (SISSA)	Radio Galaxies and Compton-thick AGN
ABSTRACT: Low luminosity radio galaxies:\r\n\r\nhttp://adsabs.harvard.edu/abs/2012arXiv1210.4540B.\r\n\r\nCompton-thick AGN from the X-ray background:\r\n\r\nhttp://adsabs.harvard.edu/abs/2012A%26A...546A..98A.
Oct 09 2012 14:00	Library Red Meeting Room	Zhenyi Cai and Sandra Raimundo (SISSA)	Measuring the size of an accretion disc
ABSTRACT: Accretion disc sizes in gravitationally lensed quasars:\r\n\r\nhttp://adsabs.harvard.edu/abs/2008A%26A...490..933E.\r\n\r\nAccretion disc size and black hole mass relation:\r\n\r\nhttp://adsabs.harvard.edu/abs/2008A%26A...490..933E.
Sep 25 2012 14:00	Library Red Meeting Room	Ambra Nanni (SISSA)	Detection of dark galaxies
ABSTRACT: Detection of dark galaxies and circum-galactic filaments fluorescently illuminated by a quasar at z = 2.4: http://adsabs.harvard.edu/abs/2012MNRAS.425.1992C.
Sep 11 2012 14:00	Library Red Meeting Room	Heng Hao and Alessandro Bressan (SISSA)	Spectral energy distributions
ABSTRACT: Discussion of SED fitting in AGN and galaxies and stellar evolution modelling.
Jul 04 2012 14:00	Library Red Meeting Room	Sandra Raimundo (SISSA)	Black hole fuelling in obscured quasars
ABSTRACT: Heavily Obscured Quasar Host Galaxies at z~2 are Disks, Not Major Mergers: http://arxiv.org/abs/1206.4063
Jun 19 2012 14:00	Library Red Meeting Room	Sandra Raimundo (SISSA)	Gas and stellar dynamics in NGC 1068
ABSTRACT: 2D mapping of young stars in the inner 180 pc of NGC 1068: correlation with molecular gas ring and stellar kinematics: http://arxiv.org/abs/1206.4014.
Jun 05 2012 14:00	Library Red Meeting Room	Sandra Raimundo and Yang Chen (SISSA)	Outflows and Stellar Initial Mass Function
ABSTRACT: Strong quasar feedback in the early Universe:\r\n\r\nhttp://arxiv.org/abs/1204.2904.\r\n\r\nThe Stellar Initial Mass Function in Early-Type Galaxies:\r\n\r\nhttp://arxiv.org/abs/1205.6471.
May 22 2012 14:00	Big Meeting Room	Gianluca Castignani and Paolo Salucci (SISSA)	High redshift galaxy cluster and dark matter
ABSTRACT: A z = 1.75 galaxy cluster:\r\n\r\nhttp://arxiv.org/abs/1205.3786\r\nhttp://arxiv.org/abs/1205.3787\r\nhttp://arxiv.org/abs/1205.3788\r\n\r\nOn the local dark matter density:\r\n\r\nhttp://arxiv.org/abs/1205.4033.
May 08 2012 14:00	Library Red Meeting Room	Yang Chen and Luigi Danese (SISSA)	A young galaxy and luminosity functions
ABSTRACT: A highly magnified candidate for a young galaxy seen when the Universe was 500 Myrs old:\r\n\r\nhttp://arxiv.org/abs/1204.2305\r\n\r\nDiscussion of luminosity functions and AGN/star formation detected in the X-rays and Infrared
Apr 10 2012 14:00	Big Meeting Room	Sandra Raimundo (SISSA)	AGN evolution
ABSTRACT: A Tale of Two Populations: The Contribution of Merger and Secular Processes to the Evolution of Active Galactic Nuclei:\r\n\r\nhttp://arxiv.org/abs/1203.5117.
Dec 06 2011 14:00	room 135	Nicola Bassan (SISSA)	Cooling of superfluid neutron stars
ABSTRACT: I will discuss three papers* reporting (and discussing) a rapid surface cooling of the Cassiopeia A Neutron Star. The Cas A supernova remnant was discovered by Chandra in 1999 and since then has been well studied. We know that the neutron star is young (330 yr.) and close-by (3.4 kpc). Remarkably Heinke and Ho claim that the surface temperature has dropped by 4% in just 10 years (with 5.4 sigma significance) and this fast cooling is now interpreted as the best available indication for the existence of a superfluid in neutron stars interior. * Heinke and Ho, Astrophys.J.719:L167-L171,2010 - arXiv 1007.4719 * Shternin et al, Mon. Not. Roy. Astron. Soc. 412, L108-L112 (2011) - arXiv 1012.0045 * Page et al, PRL.106:081101,2011 - arXiv 1011.6142
Apr 07 2011 14:00	SISSA, Room 135	Maryam Tavakoli (SISSA)	Diffuse Galactic Gamma Rays at intermediate and high latitudes
ABSTRACT:
Mar 31 2011 14:00	SISSA, Room 135	Riccardo Valdarnini (SISSA)	Turbulence and numerical viscosity in SPH simulations of galaxy clusters
ABSTRACT: A large set of N-body/SPH hydrodynamical cluster simulations is constructed with the aim of studying in SPH simulations the impact of numerical viscosity and the development of turbulence in the ICM of the simulated clusters. The SPH code implements a time-dependent artificial viscosity scheme in which each particle has its own viscosity parameter, whose time evolution is governed by the local shock conditions. The spectral properties of the gas velocity field are investigated at the present epoch by measuring for the simulated clusters the velocity power spectrum E(k). The longitudinal component E_c(k) exhibits over a limited range a Kolgomorov-like scaling k^-5/3, whilst the solenoidal power spectrum component E_s(k) is strongly influenced by numerical resolution effects. Dissipative effects are found to be significant at length scales 100-300 Kpc, with viscous damping of the velocities being less pronounced in those runs with the lowest artificial viscosity. The turbulent energy density radial profile E_turb(r) is strongly affected by the numerical viscosity scheme adopted in the simulations, with the turbulent-to-total energy density ratios being higher in the runs with the lowest artificial viscosity settings and lying in the range between a few percent and ~10%. These values are in accord with the corresponding ratios extracted from previous cluster simulations realized using mesh-based codes. Finally, radiative runs are characterized by the presence in the cluster inner regions of high levels of turbulence, generated by the interaction of the compact cool gas core with the ambient medium.
Mar 24 2011 14:00	SISSA, Room 135	Wolfgang Kastaun (SISSA)	Overview of gravitational waves from isolated neutron stars
ABSTRACT:
Feb 24 2011 14:00	SISSA, Room 135	Rudy Gilmore (SISSA)	Detection of GeV emission from GRBs with Cherenkov telescopes
ABSTRACT:
Jan 20 2011 14:00	SISSA, Room 128	Joaquin Gonzalez-Nuevo (SISSA)	Discussion of the Planck early results
ABSTRACT:
Jan 13 2011 13:30	SISSA, Room 128	Jorge Moreno (SISSA)	Discussion of Callegari et al 2010: "Growing Massive Black Hole Pairs in Minor Mergers of Disk Galaxies
ABSTRACT: http://arxiv.org/abs/1002.1712
Dec 17 2010 14:00	SISSA, room 128	Ilias Cholis (SISSA)	The Fermi haze as a signal of Dark Matter
ABSTRACT: Recent full-sky maps of the Galaxy from the Fermi Gamma-Ray Space Telescope have revealed a diffuse component of emission towards the Galatic centerand extending up to ~50 degrees in latitude. This Fermi 'haze' is the inverse Compton emission generated by the same electrons which generate the microwave synchrotron haze at WMAP wavelengths. The gamma-ray haze has two distinct characteristics: the spectrum is significantly harder than emission elsewhere in the Galaxy and the morphology is elongated in latitude with respect to longitude with an axis ratio of ~1.7. If these electrons are generated through annihilations of dark matter particles in the Galactic halo, this morphology is difficult to realize with a standard spherical halo and isotropic cosmic-ray diffusion. However, I will discuss the possibility that anisotropic diffusion along ordered field lines towards the center of the Galaxy coupled with a prolate dark matter halo can easily yield the required morphology without making unrealistic assumptions about diffusion parameters. Furthermore, a Sommerfeld enhancement to the annihilation cross-section of ~100 yields a good fit to the morphology, amplitude, and spectrum of both the gamma-ray and microwave haze, while explaining the local CR anomalies as well.
Dec 15 2010 13:15	SISSA, room 135	Joaquin Gonzalez-Nuevo (SISSA)	Discussion of Negrello et al 2010: "The Detection of a Population of Submillimeter-Bright, Strongly Lensed Galaxies"
ABSTRACT:
Dec 10 2010 14:00	SISSA, room 128	Nicola Bassan (SISSA)	Discussion of Demorest et al. 2010: "A two-solar-mass neutron star measured using Shapiro delay"
ABSTRACT: See http://www.nature.com/nature/journal/v467/n7319/full/nature09466.html
Mar 31 2010 13:10	SISSA, Room E	Rudy Gilmore (SISSA)	The Extragalactic Background Light and Gamma-ray Attenuation
ABSTRACT: Attenuation of high-energy gamma-rays by pair-production with UV, optical and IR background photons provides a link between the history of galaxy formation and high-energy astrophysics. I will present results from recent semi-analytic models, which are based upon a Lambda-CDM hierarchical structure formation scenario and employ all ingredients thought to be important to galaxy formation and evolution, including reprocessing of starlight by dust to mid- and far-IR wavelengths. These models are successful in reproducing a large variety of observational constraints such as number counts, luminosity and mass functions, and color bi-modality. A closely related undertaking has been to extend these calculations to far-UV wavelengths by accounting for the quasar contribution and processing by the intergalactic medium. These wavelengths are relevant for absorption of the lower energy GeV photons that are being seen by the recently-launched Fermi Gamma-Ray Space Telescope satellite. I will show how background photons affect the observations of high-energy blazars, and also discuss how observations of the highest energy emission from gamma-ray bursts (GRBs) by satellite and ground-based detectors could be a useful, though technically challenging, probe this evolving photon population. Local absorption of the GRB photons within the host galaxy could also affect this emission, and I will show some preliminary results of an attempt to estimate the magnitude of this effect.
Mar 17 2010 13:00	SISSA, Room E	Valeria Pettorino (SISSA)	Coupled dark energy cosmologies and impact on structure formation
ABSTRACT: I will give an overview of coupled dark energy models, in which dark energy interacts with other species in the universe. I will illustrate the effects that coupled dark energy has at the linear and non-linear level, introducing an effective force, stronger than gravity and mediated by dark energy, that modifies structure formation. In particular I will describe the case of growing neutrino quintessence, where dark energy properties are connected to the neutrino mass, predicting the possibility of having stable neutrino lumps at supercluster scales.
Mar 10 2010 13:00	Room E	Eunwha Jeong (SISSA)	Topological defects and cosmic strings: a brief summary
ABSTRACT: We will briefly review the origin of topological defects, and their impact on cosmology and high energy physics. We also discuss cosmic strings, which are the only type of defects that may have left physically observable signals.
Feb 24 2010 13:00	SISSA, Room E	Jason Dick (SISSA)	Large-scale inhomogeneities may improve the cosmic concordance of supernovae
ABSTRACT: http://arxiv.org/abs/1002.1232
Apr 22 2009 14:30	SISSA, Room E	Stefano Finazzi (SISSA)	Analogue Models of Gravity and Superluminal Travel
ABSTRACT: He motivation for studying analogue models of gravity is twofold. Firstly, phenomena as Hawking radiation are very faint in ordinary gravity. The realization of analogue systems as Bose-Einstein condensates can be the only way to probe experimentally some prediction of quantum field theory in curved spacetimes. Secondly, analogue models suggest different theoretical approaches to quantum gravity phenomenology. Furthermore, as a by-product, the instruments developed to study these systems can be used to solve open problems of general relativity and quantum field theory. As an example, I will show this machinery at work to put constraints on the possibility of superluminal travel through the Alcubierre's warp drive.
Feb 25 2009 14:30	SISSA, Room E	Carlo Baccigalupi (SISSA)	"What the small angle CMB really tells us about the curvature of the Universe" Authors: Clifton et al.
ABSTRACT: ArXiv:0902.1313