High-Resolution Three-Dimensional Simulations of Core-Collapse Supernovae in Multiple Progenitors

Дата и время публикации : 2013-10-21T21:07:09Z

Авторы публикации и институты :
Sean M. Couch
Evan P. O’Connor

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 21 pages, 16 figures, submitted to ApJ
Первичная категория: astro-ph.HE

Все категории : astro-ph.HE

Краткий обзор статьи: Three-dimensional simulations of core-collapse supernovae are granting new insight into the as-yet uncertain mechanism that drives successful explosions. While there is still debate about whether explosions are obtained more easily in 3D than in 2D, it is undeniable that there exist qualitative and quantitative differences between the results of 3D and 2D simulations. We present an extensive set of high-resolution one-, two-, and three-dimensional core-collapse supernova simulations with multispecies neutrino leakage carried out in two different progenitors. Our simulations confirm the results of Couch (2013a) indicating that 2D explodes more readily than 3D. We argue that this is due to the inadequacies of 2D to accurately capture important aspects of the three-dimensional dynamics. We examine the development of neutrino-driven convection and the standing accretion shock instability and find that, in separate regimes, either instability can dominate. We find evidence for growth of the standing accretion shock instability for both 15-Msun and 27-Msun progenitors, however, it is weak in exploding models. The growth rate of both instabilities is artificially enhanced along the symmetry axis in 2D as compared with our axis-free 3D Cartesian simulations. Our work highlights the growing consensus that core-collapse supernovae must be studied in 3D if we hope to solve the mystery of how the explosions are powered.

Category: Physics