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Encounters between binaries and neutron starsWe simulated encounters between a neutron star and primordial and tidal-capture binaries. In the case of encounters involving a tidal-capture binary, comprising a white dwarf and a main-sequence star, we find that most exchange encounters will produce a single merged object with the white dwarf and neutron star engulfed in a common envelope of gas donated by the main-sequence primary of the original binary. A small fraction of exchanges induce a merger of the white dwarf and main-sequence star, with this object being unbound to the neutron star, and the two objects having a large relative speed at infinity. For encounters involving a primordial binary, fewer encounters require the inclusion of hydrodynamical effects. Those involving collisions or close encounters tend to produce a binary comprised of the two merged stars (now forming one star) and the third star. The binaries produced typically have large enough separations to prevent the formation of a single merged object until subsequent stellar evolution of one of the components causes it to fill its Roche lobe. Clean exchanges produce binaries with large eccentricities; they are typically sufficiently wide to avoid circularization.
Document ID
19930057630
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Davies, M. B.
(California Inst. of Technology Pasadena, United States)
Benz, W.
(Arizona Univ. Tucson, United States)
Hills, J. G.
(Los Alamos National Lab. NM, United States)
Date Acquired
August 16, 2013
Publication Date
July 1, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 411
Issue: 1
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
93A41627
Funding Number(s)
CONTRACT_GRANT: NAGW-1963
CONTRACT_GRANT: NSF AST-92-06378
Distribution Limits
Public
Copyright
Other

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