Collapse Velocity and Prompt Explosion for the Presupernova Model Ws15M

For the presupernova modelWs15M⊙, we re-calculate the electron capture （EC） timescale and hydrodynamical （HD） timescale. We found that the EC timescale can be smaller than the HD timescale in the inner region of the collapse iron core at the moment immediately before the shock wave bounce. The chang...

Full description

Saved in:
Bibliographic Details
Published in:Chinese journal of astronomy and astrophysics 2006-08, Vol.6 (4), p.455-460
Main Authors: Luo, Zhi-Quan, Liu, Men-Quan, Peng, Qiu-He, Xie, Zuo-Heng
Format: Article
Language:English
Subjects:
核反应
核合成
超新星
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:For the presupernova modelWs15M⊙, we re-calculate the electron capture （EC） timescale and hydrodynamical （HD） timescale. We found that the EC timescale can be smaller than the HD timescale in the inner region of the collapse iron core at the moment immediately before the shock wave bounce. The change in these two timescales at the late stage of core collapse is expected to affect the collapse velocity. If the late-time collapse velocity is artificially increased by a small quantity, then prompt explosion of the supernova may happen. Further calculations are still needed to check the plausibility of the acceleration mechanism caused by the faster EC process.
ISSN:1009-9271
DOI:10.1088/1009-9271/6/4/08