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Long-term photometry of the near-contact detached binary GR Tauri
Zhang, XB; Zhang, RX; Fang, MJ
2002-11-01
Source PublicationASTRONOMY & ASTROPHYSICS
Volume395Issue:2Pages:587-593
AbstractWe present photometric observations of the eclipsing binary GR Tau made in 1985, 1993, 1998, 2000 and 2001. New times of minima and ephemerides are given. Based on a statistical analysis of the times of minima obtained by photoelectric and CCD photometry, the orbital period of the system is found to be decreasing with a rate of DeltaP/P = 3.27 x 10(-10) during the past decades. An assumed hot spot on the trailing hemisphere of the secondary enables us to reconstruct the peculiar asymmetry of the distorted light curves. The photometric solution with the Wilson-Devinney code reveals that GR Tau is a near-contact detached system with the two components almost filling their respective critical Roche lobes. The photometric mass ratio turns out to be q = 0.22, and the masses and radii are derived for the components as M(1) = 1.42 +/- 0.18 M(circle dot), M(2) = 0.31 +/- 0.04 M(circle dot), R(1) = 1.47 +/- 0.19 R(circle dot) and R(2) = 0.70 +/- 0.09 R(circle dot). The authors discuss the possible evolutionary status of the component stars and the probable nature of the assumed hot spot.
KeywordStars : Binaries : Eclipsing Stars : Individual : Gr Tau
DOI10.1051/0004-6361:20021317
Indexed BySCI
Language英语
WOS IDWOS:000179291000028
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8512
Collection光学天文研究部
AffiliationChinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Zhang, XB,Zhang, RX,Fang, MJ. Long-term photometry of the near-contact detached binary GR Tauri[J]. ASTRONOMY & ASTROPHYSICS,2002,395(2):587-593.
APA Zhang, XB,Zhang, RX,&Fang, MJ.(2002).Long-term photometry of the near-contact detached binary GR Tauri.ASTRONOMY & ASTROPHYSICS,395(2),587-593.
MLA Zhang, XB,et al."Long-term photometry of the near-contact detached binary GR Tauri".ASTRONOMY & ASTROPHYSICS 395.2(2002):587-593.
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