Astrophysics News & Events

Oleg Tsupko, an expert in several strong gravity topics including lensing and black hole shadows, joins Gr@v as a CEEC researcher from April 2026. Welcome Oleg!

I will discuss the first 3D-general relativistic magnetohydrodynamic (GRMHD) simulation of sustained accretion onto a horizonless singularity in which matter falls onto the central object rather than being accumulated outside of it or expelled in outflows.

Equilibrium accretion tori are used as initial conditions for GRMHD simulations to study accretion onto compact objects. In this talk, I present the construction of magnetized Komissarov-type discs within hairy black hole spacetimes. I show that equilibrium configurations can be consistently obtained in these backgrounds, as in the standard Kerr case.

Astrophysical environments provide an arena to test vacuum General Relativity with gravitational waves. In this talk, I will discuss what binary black hole observations can probe beyond the vacuum paradigm, and where fundamental limitations arise.

Our understanding of the cosmos is shaped by what we are able to observe in the sky. Resolving progressively smaller astrophysical structures requires instruments with increasingly high angular resolution. However, even an ideal telescope is limited by nature through diffraction, which ties its resolving power to the diameter of its collecting aperture.