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Black hole accretion powers luminous astronomical phenomena and produces feedback to the surrounding environment. The physics of the accretion disk, outflow and emission depend on parameters such as the accretion rate, the disk angular momentum, the magnetic field strength, etc. In this talk, I will mainly discuss our recent works on using general relativistic magnetohydrodynamic simulations to understand 1) Bond-like accretion flows with very low specific angular momenta and 2) super-Eddington accretion flows. I will show interesting results such as how the specific angular momentum of the accretion disk determines whether powerful jets can be launched from the system, and how super-Eddington accretion can produce emissions which sensitively depend on the viewing-angle.
Prof. Jane Lixin Dai is an assistant professor at the Department of Physics of The University of Hong Kong. Her work focuses on black hole astrophysics, including tidal disruption events, black hole accretion, jets, and X-ray reverberation. She received her PhD degree at the Stanford University. Before working in Hong Kong, she worked at the University of Copenhagen as an assistant professor, where she currently holds the Sophie and Tycho Brahe Visiting Professorship. She has received various awards, including the Block Award from the Aspen Physics Center and the NSFC National Excellent Young Scientist program.