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A Model for Contact Binary Systems
Han FengSong; Run QianHuang; Shao LanBi
2007
Source PublicationChinese Journal of Astronomy and Astrophysics
ISSN1009-9271
Volume7Issue:4Pages:539
AbstractA model for contact binary systems is presented, which incorporates the following special features: a) The energy exchange between the components is based on the understanding that the energy exchange is due to the release of potential, kinetic and thermal energies of the exchanged mass. b) A special form of mass and angular momentum loss occurring in contact binaries is losses via the outer Lagrangian point. c) The effects of spin, orbital rotation and tidal action on the stellar structure as well as the effect of meridian circulation on the mixing of the chemical elements are considered. d) The model is valid not only for low-mass contact binaries but also for high-mass contact binaries. For illustration, we used the model to trace the evolution of a massive binary system consisting of one 12M⊙ and one 5M⊙ star. The result shows that the start and end of the contact stage fall within the semi-detached phase during which the primary continually transfers mass to the secondary. The time span of the contact stage is short and the mass transfer rate is very large. Therefore, the contact stage can be regarded as a special part of the semi-detached phase with a large mass transfer rate. Both mass loss through the outer Lagrangian point and oscillation between contact and semi-contact states can occur during the contact phase, and the effective temperatures of the primary and the secondary are almost equal.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/44563
Collection中国科学院国家天文台
Affiliation中国科学院国家天文台
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Han FengSong,Run QianHuang,Shao LanBi. A Model for Contact Binary Systems[J]. Chinese Journal of Astronomy and Astrophysics,2007,7(4):539.
APA Han FengSong,Run QianHuang,&Shao LanBi.(2007).A Model for Contact Binary Systems.Chinese Journal of Astronomy and Astrophysics,7(4),539.
MLA Han FengSong,et al."A Model for Contact Binary Systems".Chinese Journal of Astronomy and Astrophysics 7.4(2007):539.
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