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Title:
Conditions for accretion-induced collapse of white dwarfs
Authors:
Nomoto, Ken'ichi; Kondo, Yoji
Affiliation:
AA(Tokyo, University, Japan), AB(NASA, Goddard Space Flight Center, Greenbelt, MD)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 367, Jan. 20, 1991, p. L19-L22. (ApJL Homepage)
Publication Date:
01/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Globular Clusters, Gravitational Collapse, Pulsars, Stellar Evolution, Stellar Mass Accretion, White Dwarf Stars, Binary Stars, Neutron Stars, Stellar Models, X Ray Binaries
DOI:
10.1086/185922
Bibliographic Code:
1991ApJ...367L..19N

Abstract

Recent discovery of an unexpectedly large number of low-mass binary pulsars (LMBPs) in globular clusters has instigated active discussions on the evolutionary origin of binary pulsars. Prompted by the possibility that at least some of LMBPs originate from accretion-induced collapse (AIC) of white dwarfs, a reexamination is conducted as to whether or not AIC occurs for the new models of O + Ne + Mg white dwarfs and solid C + O white dwarfs that can ignite explosive nuclear burning at significantly lower central densities than in the previous models. Even with low critical densities, AIC is still much more likely than explosion for both types of white dwarfs. Possible regions for AIC are presented in a diagram of mass accretion rate vs initial mass of the white dwarfs.

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