Conditions for accretion-induced collapse of white dwarfs

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185922· OSTI ID:5976792

Nomoto, Kenichi; Kondo, Yoji ^[1]

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1. Tokyo Univ. (Japan) NASA, Goddard Space Flight Center, Greenbelt, MD (USA)

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. 42 refs.

• OSTI ID: 5976792
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 367; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BINARY STARS
COSMIC RADIO SOURCES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
DENSITY
DWARF STARS
EXPLOSIONS
GRAVITATIONAL COLLAPSE
MASS
MATHEMATICAL MODELS
NEUTRON STARS
ORIGIN
PHYSICAL PROPERTIES
PULSARS
STAR ACCRETION
STAR CLUSTERS
STAR EVOLUTION
STAR MODELS
STARS
WHITE DWARF STARS