Speaker
Description
Super-Eddington accretion happens in various astrophysical systems. For example, it is currently believed that super-Eddington accretion onto black holes powers tidal disruption events (TDEs), little red dots (LRDs) and a large fraction of ultra-luminous X-ray sources (ULXs). In this work, we conduct a series of 3D general relativistic radiation magnetohydrodynamics (GRRMHD) simulations of strongly magnetized accretion flows around stellar-mass black holes. While similar simulations have been performed previously, a systematic investigation of how various physical parameters affect the properties of the disk and outflow has been lacking. Our results disclose that the mass accretion rate and the black hole spin control the energy output and the outflow-inflow ratio for such accretion flows, which shed light on understanding super-Eddington systems such as LRDs. We address several questions, such as how luminous the emission sources can be, how beamed the emissions are, and what determines the power of their winds and jets.