Computational modeling of electron-capture supernovae

by Dr Shuai Zha (Stockholm University, Sweden)

Wednesday 2 Dec 2020, 10:00 → 11:00 Asia/Shanghai

TDLI Meeting Room 202

Abstract

Stars with ~8–10 M ⊙ evolve to form a strongly degenerate ONeMg core. When the core mass becomes close to the Chandrasekhar mass, the core undergoes electron captures on 24Mg and 20Ne that induce an electron-capture supernova (ECSN). Previous results suggested that the ONeMg core in ECSN will collapse into a neutron star (NS). However, this scenario is not unambiguously justified. Alternatively, the oxygen deflagration initialized by the heating due to electron capture on 20Ne may lead to a partial thermonuclear explosion.
In this talk, I will present our new results of ECSN progenitor evolution based on MESA and 2D flame-capturing hydrodynamics simulations. 

Biography

I did my phD at the Chinese University of Hong Kong and I am currently a post-doc at The Oskar Klein Centre and Department of Astronomy in Stockholm University, Sweden. 
I majorly work on computer simulations of stellar evolution and supernovae and their multi-messenger (gravitational-wave and neutrino) signals. For more information, visit joshuashzha.github.io. Now I am visiting TDLI institute and wish to talk and collaborate with TDLI researchers.

Chair

Prof. Fabo Feng

Division

Astronomy and Astrophysics

Other information

Video record is available within SJTU: https://vshare.sjtu.edu.cn/play/b112279d5e7527fbb4ef23725991f158