Astrophysics Journal Club

An Extragalactic Astrophysics Journal Club takes place every two weeks. The main goal is to have an informal meeting to discuss the recently published papers in the area of Extragalactic Astrophysics (e.g. Galaxy Formation and Evolution, Star Formation, Active Galactic Nuclei). The papers can be discussed by anyone (students, post-docs or members of staff). The main aim and results of each paper are discussed in 10-15 min and in general there are 2-3 papers presented per session. Everyone is welcome to attend, please contact Elias Kammoun to be included in the mailing list.

You can find the list of seminars scheduled in the week in the calendar and Journal Club history.

Next Journal Club

Quasilocal energy made practical
Valerio Faraoni
(Bishop\'s University, Sherbrooke, Canada)

Thu, Jun 29 2017, 0:00

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.

Below you find the calendar of the next Journal Clubs.

Calendar
Date Speaker Title
Jun 29 2017
0:00
Valerio Faraoni
(Bishop\'s University, Sherbrooke, Canada)
Quasilocal energy made practical