Session:- Simulations of accretion and outflow near black holes - 1
Theoretical and observational studies of astrophysical black holes have been in rapid development in recent decades. This conference will present major breakthroughs and key remaining questions concerning our fundamental understanding of astrophysical black holes, such as the formation and collimation of relativistic jets, the accretion and growth of black holes, the measurement of black hole spin, the merger of black holes, the first images of black hole shadow, the particle acceleration mechanisms and transient phenomena around black holes, and the feedback from massive black holes to galaxies.
◎Radiation MHD simulations of super-/near-Eddington accretion flows and outflows
By performing the radiation-MHD simulations, the speaker and his team reveal the global inflow and outflow structures around black holes. The optically and geometrically thick disks supported by the radiation pressure form, and the powerful outflows are driven by the radiation force for electron scattering in the super-Eddington phase. A part of the outflows fragments into numerous gas clouds, and the outflow generated near the trapping radius falls to the disk surface. It is also found that, for the case of the rotating black holes, the energy conversion efficiency increases, and the precession motion of the disk occurs. In the near-Eddington case, the radiation force for spectral lines is responsible for the disk winds, which is thought to be the origin of the ultrafast outflows.
時間：2023.06.24(六) 09:30~10:05
講者：Prof. Ken Ohsuga
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◎Numerical study of AGN feedback at galactic scale
The speaker will review wind launched from black holes, including their theoretical and observational evidences, main properties, driving mechanism, and its comparison with jet. While the talk will mainly focus on wind from a hot accretion flow, the cases of wind production from a standard thin disk and a super-Eddington accretion flow and the roles of wind played in AGN feedback will also be breifly introduced.
時間：2023.06.24(六) 10:05~10:40
講者：Prof. Feng Yuan
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地點：香港大學 百週年校園 CPD 3.04 Centennial Campus
語言：英語
是會議作坊，參加者必須登記，2023.04.30 截止
【此屬轉載訊息，以主事單位發佈為準】
此活動由香港大學物理系主辦。
https://astrobh.physics.hku.hk/event/3/timetable/#all.detailed
