Absolute properties of the binary system BB pegasi
Küçük Resim Yok
Tarih
2007
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
University of Chicago Press
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
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. © 2007. The American Astronomical Society. All rights reserved.
Açıklama
Anahtar Kelimeler
Binaries: close, Binaries: eclipsing, Stars: individual (BB Pegasi), Stars: late-type
Kaynak
Astronomical Journal
WoS Q Değeri
Scopus Q Değeri
Q1
Cilt
134
Sayı
2
