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GR: Fachverband Gravitation, Relativistische Astrophysik und Kosmologie

GR 14: Relativistic Astrophysics IV

GR 14.3: Vortrag

Donnerstag, 19. März 2026, 16:45–17:00, KH 01.016

Hot Dark Stars: Mass-Radius Curves of an Interacting Fermi Gas at Finite Temperatures and Their Collapse to Black Holes — •Adil-Mir Zia, Ishfaq Ahmad Rather, Selina Kunkel, Sarah Pitz, and Jürgen Schaffner-Bielich — Institute for Theoretical Physics, Goethe University, Frankfurt am Main

We investigate the mass-radius relations of dark stars using a temperature-dependent equation of state for interacting Fermi gases. Varying the entropy per baryon and the interaction strength allows us to quantify how finite-temperature effects and the underlying couplings influence the structure and stability of hot dark stars. We also compute the particle number along constant-entropy sequences to examine the possibility of a delayed collapse during the early evolution. These results clarify how thermal and interaction effects shape the properties of newly formed dark stars.

Keywords: Dark stars; Equation of state; Finite-temperature effects; Interacting Fermi gases; Mass–radius relation