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arXiv:astro-ph/0011248 (astro-ph)
[Submitted on 13 Nov 2000]

Title:The population of close double white dwarfs in the Galaxy

Authors:Lev Yungelson (1), Gijs Nelemans (2), Simon. F. Portegies Zwart (3), Frank Verbunt (4) ((1) Institute of Astronomy of the RAS, Moscow, Russia, (2) Astronomical Institute "Anton Pannekoek", Amsterdam, the Netherlands, (3) MIT, Cambridge, USA, (4) Astronomical Institute, Utrecht University, Utrecht, the Netherlands)
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Abstract: We present a new model for the Galactic population of close double white dwarfs. The model accounts for the suggestion of the avoidance of a substantial spiral-in during mass transfer between a giant and a main-sequence star of comparable mass and for detailed cooling models. It agrees well with the observations of the local sample of white dwarfs if the initial binary fraction is close to 50% and an ad hoc assumption is made that white dwarfs with mass less than about 0.3 solar mass cool faster than the models suggest. About 1000 white dwarfs brighter than V=15 have to be surveyed for detection of a pair which has total mass greater than the Chandrasekhar mass and will merge within 10 Gyr.
Comments: 15 pages, 7 figures, to appear in Proc. ``The influence of binaries on stellar population studies'', Brussels, August 2000 (Kluwer, D. Vanbeveren ed.)
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0011248
  (or arXiv:astro-ph/0011248v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0011248
Related DOI: https://doi.org/10.1007/978-94-015-9723-4_25

Submission history

From: Lev Yungelson [view email]
[v1] Mon, 13 Nov 2000 14:13:52 UTC (116 KB)
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