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Title:
Type II supernovae from 8-10 solar mass asymptotic giant branch stars
Authors:
Hashimoto, Masaaki; Iwamoto, Kohichi; Nomoto, Ken'ichi
Affiliation:
AA(Kyushu Univ., Fukuoka, Japan), AB(Tokyo Univ., Japan), AC(Tokyo Univ., Japan)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 414, no. 2, p. L105-L108. (ApJL Homepage)
Publication Date:
09/1993
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Asymptotic Giant Branch Stars, Stellar Evolution, Supernovae, Light Curve, Stellar Composition, Stellar Cores, Stellar Mass, Wave Functions
DOI:
10.1086/187007
Bibliographic Code:
1993ApJ...414L.105H

Abstract

The final evolution of 8-10-solar mass stars in the AGB phase is recalculated to clarify whether these stars undergo collapse or thermonuclear explosion. New electron capture rates based on the shell model wave functions are employed for the evolution of the degenerate O + Ne + Mg core. It is found that the difference between the old and new rates are too small to alter the earlier conclusion that the O + Ne + Mg core collapses. The optical appearance of the resultant supernova explosion of AGB stars are discussed for observational diagnostics. In particular, a possible connection of the AGB star model with SN 1993J is examined.

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