Abstract
The accretion of gas onto black holes powers luminous emission and energetic outflows. Recent studies reveal that super-Eddington accretion happens in various astrophysical systems, in which gas accretes onto black holes at mass rates which are much higher than the prediction from classical theory. I focus on studying these extreme accretion events by conducting novel numerical simulations, which can capture the complexity brought by plasma hydrodynamics, magnetic fields, radiation, and general relativity. In this seminar, I present some ongoing projects: 1) I have conducted a series of 3D general relativistic radiation magnetohydrodynamics (GRRMHD) simulations of highly magnetized accretion flows around stellar-mass black holes, which can be used to model ultraluminous X-ray sources (ULXs). 2) I have modelled quasi-periodic eruptions (QPEs), a new type of astronomical phenomenon, using super-Eddington accretion flows around supermassive black holes combined with Lense-Thirring precession. I will also present some future plan of projects to be carried out.
Anyone interested is welcome to attend.