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Title: Absolute properties of the binary system BB pegasi
Authors: Kalomeni, Belinda
Yakut, Kadri
Keskin, Varol
Değirmenci, Ömer Lütfi
Ulaş, B.
Köse, O.
Keywords: Binaries
BB pegasi
Issue Date: Aug-2007
Publisher: IOP Publishing Ltd.
Source: Kalomeni, B., Yakut, K., Keskin, V., Değirmenci, Ö. L., Ulaş, B., and Köse, O. (2007). Absolute properties of the binary system BB pegasi. Astronomical Journal, 134(2), 642-647.
Abstract: We present ground-based photometry of the low-temperature contact binary BB Peg. We collected all the times of mid-eclipse available in the literature and combined them with those obtained in this study. Analyses of the data indicate a period increase of (3.0 ± 0.1) × 10-8 days yr -1. This period increase of BB Peg can be interpreted in terms of the mass transfer 2.4 × 10-8 M⊙ yr-1 from the less massive to the more massive component. The physical parameters have been determined as Mc = 1.42M⊙, Mh = 0.53 M⊙, Rc = 1.29 R⊙, Rh, = 0.83 R⊙, Lc = 1.86 L⊙, and L h = 0.94 L⊙ through simultaneous solutions of light and of the radial velocity curves. The orbital parameters of the third body, which orbits the contact system in an eccentric orbit, were obtained from the period variation analysis. The system is compared to the similar binaries in the Hertzsprung-Russell and mass-radius diagrams.
ISSN: 0004-6256
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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