Published in Physical Review Letters, the research opens new directions in the study of ultracompact stars
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A new kind of star comes up from a study by SISSA’s postdoctoral researcher Raúl Carballo-Rubio. In a piece of research recently published in Physical Review Letters, Carballo-Rubio has developed a novel mathematical model that combines general relativity with the repulsive effect of quantum vacuum polarization. The inclusion of this repulsive force allows describing ultracompact configurations of stars, which were previously considered by scientists not to exist in equilibrium.