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Eclipsing binary statistics - Theory and observation

Söderhjelm, Staffan LU and Dischler, Johann LU (2005) In Astronomy & Astrophysics 442(3). p.1003-1013
Abstract
The expected distributions of eclipse-depth versus period for eclipsing binaries of different luminosities are derived from large-scale population synthesis experiments. Using the rapid Hurley et al. BSE binary evolution code, we have evolved several hundred million binaries, starting from various simple input distributions of masses and orbit-sizes. Eclipse probabilities and predicted distributions over period and eclipse-depth (P/Delta m) are given in a number of main-sequence intervals, from O-stars to brown dwarfs. The comparison between theory and Hipparcos observations shows that a standard (Duquennoy & Mayor) input distribution of orbit-sizes ( a) gives reasonable numbers and P/Delta m-distributions, as long as the mass-ratio... (More)
The expected distributions of eclipse-depth versus period for eclipsing binaries of different luminosities are derived from large-scale population synthesis experiments. Using the rapid Hurley et al. BSE binary evolution code, we have evolved several hundred million binaries, starting from various simple input distributions of masses and orbit-sizes. Eclipse probabilities and predicted distributions over period and eclipse-depth (P/Delta m) are given in a number of main-sequence intervals, from O-stars to brown dwarfs. The comparison between theory and Hipparcos observations shows that a standard (Duquennoy & Mayor) input distribution of orbit-sizes ( a) gives reasonable numbers and P/Delta m-distributions, as long as the mass-ratio distribution is also close to the observed flat ones. A random pairing model, where the primary and secondary are drawn independently from the same IMF, gives more than an order of magnitude too few eclipsing binaries on the upper main sequence. For a set of eclipsing OB-systems in the LMC, the observed period-distribution is different from the theoretical one, and the input orbit distributions and/or the evolutionary environment in LMC has to be different compared with the Galaxy. A natural application of these methods are estimates of the numbers and properties of eclipsing binaries observed by large-scale surveys like Gaia. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
stars : evolution, stars : formation, binaries : eclipsing, methods : miscellaneous, binaries : general, stars : statistics
in
Astronomy & Astrophysics
volume
442
issue
3
pages
1003 - 1013
publisher
EDP Sciences
external identifiers
  • wos:000232562700027
  • scopus:27344446181
ISSN
0004-6361
DOI
10.1051/0004-6361:20042541
language
English
LU publication?
yes
id
3ebdfbbd-4a13-446f-bbc5-137b07b1ee42 (old id 218913)
date added to LUP
2007-08-13 09:30:36
date last changed
2017-07-09 04:30:36
@article{3ebdfbbd-4a13-446f-bbc5-137b07b1ee42,
  abstract     = {The expected distributions of eclipse-depth versus period for eclipsing binaries of different luminosities are derived from large-scale population synthesis experiments. Using the rapid Hurley et al. BSE binary evolution code, we have evolved several hundred million binaries, starting from various simple input distributions of masses and orbit-sizes. Eclipse probabilities and predicted distributions over period and eclipse-depth (P/Delta m) are given in a number of main-sequence intervals, from O-stars to brown dwarfs. The comparison between theory and Hipparcos observations shows that a standard (Duquennoy & Mayor) input distribution of orbit-sizes ( a) gives reasonable numbers and P/Delta m-distributions, as long as the mass-ratio distribution is also close to the observed flat ones. A random pairing model, where the primary and secondary are drawn independently from the same IMF, gives more than an order of magnitude too few eclipsing binaries on the upper main sequence. For a set of eclipsing OB-systems in the LMC, the observed period-distribution is different from the theoretical one, and the input orbit distributions and/or the evolutionary environment in LMC has to be different compared with the Galaxy. A natural application of these methods are estimates of the numbers and properties of eclipsing binaries observed by large-scale surveys like Gaia.},
  author       = {Söderhjelm, Staffan and Dischler, Johann},
  issn         = {0004-6361},
  keyword      = {stars : evolution,stars : formation,binaries : eclipsing,methods : miscellaneous,binaries : general,stars : statistics},
  language     = {eng},
  number       = {3},
  pages        = {1003--1013},
  publisher    = {EDP Sciences},
  series       = {Astronomy & Astrophysics},
  title        = {Eclipsing binary statistics - Theory and observation},
  url          = {http://dx.doi.org/10.1051/0004-6361:20042541},
  volume       = {442},
  year         = {2005},
}