Dec 11 – 15, 2023
Tsung-Dao Lee Institute
Asia/Shanghai timezone

Simulating Super-Eddington Accretion and Outflow Around Stellar-Mass Black Holes

Dec 14, 2023, 4:15 PM
Hall # 10

Hall # 10

Contributed talk in mini symposium Accretion Processes


Tom Man Kwan (The University of Hong Kong)


Super-Eddington accretion happens in various astrophysical systems. For example, it is currently believed that super-Eddington accretion onto neutron stars and stellar-mass black holes power 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 highly 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 gas accretion rate crucially determines the outflow-inflow ratio for such accretion flows, while both the gas accretion rate and the black hole spin control the energy output. Our results shed light on understanding super-Eddington systems such as ULXs. We address several questions, such as how luminous the X-ray sources can be, how beamed their emissions are, what determines the power of their winds and jets, etc.

Primary author

Tom Man Kwan (The University of Hong Kong)


Jane Dai (The University of Hong Kong)

Presentation materials