NAOC Open IR
Influence of the Choice of Core-Envelope Transition Point on the Binary Merger of Two Main-sequence Components
Chen Xuefei; Han Zhanwen
2005
Source PublicationChinese Journal of Astronomy and Astrophysics
ISSN1009-9271
Volume5Issue:1Pages:65
AbstractWe have studied the influence of different choices of core-envelope transition point on the final merger of contact binaries with two main-sequence components. A binary of 1.00 + 0.90 M⊙ with an initial orbital period of 0.35 d is examined. The mass fraction of the primary mixed with the matter of the secondary, qmix, determined by the chosen core-envelope transition point, ranges from 0.04 to 1.00 in our analysis. If as qmix 0.71, the larger qmix is, the greater the mixing, hence the longer the blue straggler lifetime, tBS, and also the greater the luminosity. For qmix = 1.00, tBS~8.5×10^8 yr. Estimation by ↓△r-↓△a = 0.0 shows that the point at which tBS begins to increase is about qmix = 0.68. In comparison with the homogeneously mixed models, the merger with a helium profile similar to that of the primary is less luminous and has a shorter tBS.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/41559
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
Chen Xuefei,Han Zhanwen. Influence of the Choice of Core-Envelope Transition Point on the Binary Merger of Two Main-sequence Components[J]. Chinese Journal of Astronomy and Astrophysics,2005,5(1):65.
APA Chen Xuefei,&Han Zhanwen.(2005).Influence of the Choice of Core-Envelope Transition Point on the Binary Merger of Two Main-sequence Components.Chinese Journal of Astronomy and Astrophysics,5(1),65.
MLA Chen Xuefei,et al."Influence of the Choice of Core-Envelope Transition Point on the Binary Merger of Two Main-sequence Components".Chinese Journal of Astronomy and Astrophysics 5.1(2005):65.
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