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AV hydrae: A near-contact semi-detached binary with possible mass and angular momentum loss
Qian SB(钱声帮)1,2,3; Qian, SB
Source PublicationASTROPHYSICS AND SPACE SCIENCE
2000
Volume274Issue:4Pages:711-718
DOI10.1023/A:1026595602632
Contribution Rank第1完成单位
Indexed BySCI
AbstractThe photoelectric observations of the neglected binary AV Hya published by Srivastava and Kandpal (1980) have been re-analyzed using Wilson-Devinney's synthetic light-curve program. The binary turns out to be a near-contact semi-detached system. The primary, more massive, more luminous and greater component, eclipsed at primary minimum, is detached from its Roche lobe (85%). The secondary fills its Roche lobe and has a temperature difference of DeltaT = -3414 K. As with other semi-detached binaries, the secondary is more evolved than that of the primary. The times of light minima of the eclipsing have been analyzed, showing that the orbital period of AV Hya undergoes a continuous decrease with a rate of dP/dE = -8.26 x 10(-8) day/year. The mass transfer between the two components can not explain the present orbital period variation since the secondary component is filling the Roche lobe. The orbital period change demonstrates that the system may undergo a secular mass and angular momentum loss and the system may evolve from the present short-period near-contact system into an A-type contact binary.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-640X
URL查看原文
Archive Date2000-12-31
WOS IDWOS:000165811300004
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5737
Collection双星与变星研究组
Corresponding AuthorQian, SB
Affiliation1.Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011, Kunming, P.R. China
2.National Astronomical Observatories, Chinese Academy of Sciences(NAOCAS), P.R. China
3.United Laboratory of Optical Astronomy, Chinese Academy of Sciences(ULOAC), P.R. China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qian SB,Qian, SB. AV hydrae: A near-contact semi-detached binary with possible mass and angular momentum loss[J]. ASTROPHYSICS AND SPACE SCIENCE,2000,274(4):711-718.
APA Qian SB,&Qian, SB.(2000).AV hydrae: A near-contact semi-detached binary with possible mass and angular momentum loss.ASTROPHYSICS AND SPACE SCIENCE,274(4),711-718.
MLA Qian SB,et al."AV hydrae: A near-contact semi-detached binary with possible mass and angular momentum loss".ASTROPHYSICS AND SPACE SCIENCE 274.4(2000):711-718.
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