Progenitors of Gamma-ray Bursts and Black hole Hyperaccretion

by Dr Cuiying Song (李政道研究所)

Thursday 12 Nov 2020, 10:00 → 11:00 Asia/Shanghai

TDLI Meeting Room 200

Abstract

Gamma-ray bursts are the strongest and brightest explosions in the universe. In this talk, one of the leading central engine models of GRBs, a rotating stellar-mass black hole (BH) surrounded by neutrino-dominated accretion flow (NDAF) are introduced. We test the ability of NDAF to explain observational GRB data. The structure, luminosity, MeV neutrinos, and gravitational waves of magnetized NDAFs are present. Outflows play important roles in the BH accretion processes, we proposed BH hyperaccretion inflow-outflow model and place the constraint on properties of GRB progenitor stars, including their masses and metallicities through a combination of observation and progenitor models. In the last, I will talk about the simulation of massive star evolution by MESA code and my research prospect.

Biography

 I join TDLI as a postdoc this October, and just graduated with a PhD from the department of Astronomy in Xiamen University.  At the last year of my PhD, I visit Professor Alexander Heger group at Monash University in Australia. 

Chair

Dr. Zhi Li

Division

Astronomy and Astrophysics