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CALIBRATING THE UPDATED OVERSHOOT MIXING MODEL ON ECLIPSING BINARY STARS: HY Vir, YZ Cas, chi(2) Hya, and VV Crv
Meng Y(蒙盈)1,2; Zhang QS(张钱生)1,3; Meng, Y (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2014-06-01
卷号787期号:2
DOI10.1088/0004-637X/787/2/127
产权排序第1完成单位
收录类别SCI
关键词Binaries: Eclipsing Convection Stars: Evolution
摘要Detached eclipsing binary stars with convective cores provide a good tool to investigate convective core overshoot. It has been performed on some binary stars to restrict the classical overshoot model which simply extends the boundary of the fully mixed region. However, the classical overshoot model is physically unreasonable and inconsistent with helioseismic investigations. An updated model of overshoot mixing was established recently. There is a key parameter in the model. In this paper, we use observations of four eclipsing binary stars, i.e., HY Vir, YZ Cas, chi(2) Hya, and VV Crv, to investigate a suitable value for the parameter. It is found that the value suggested by calibrations on eclipsing binary stars is the same as the value recommended by other methods. In addition, we have studied the effects of the updated overshoot model on the stellar structure. The diffusion coefficient of convective/overshoot mixing is very high in the convection zone, then quickly decreases near the convective boundary, and exponentially decreases in the overshoot region. The low value of the diffusion coefficient in the overshoot region leads to weak mixing and a partially mixed overshoot region. Semi-convection, which appears in the standard stellar models of low-mass stars with convective cores, is removed by partial overshoot mixing.
项目资助者Program 973 [2011CB811403] ; National Natural Science Foundation of China (NSFC) [11303087, 11273055, 11333007] ; CAS [Y1ZX011007, Y3CZ051005] ; West Light Foundation of the Chinese Academy of Sciences
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
归档日期2014-05-19
WOS记录号WOS:000336246700032
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]TURBULENT CONVECTION MODEL ; MASSIVE STARS ; ABSOLUTE PROPERTIES ; STELLAR EVOLUTION ; NONLOCAL CONVECTION ; HELIOSEISMOLOGY ; CONSTRAINTS ; SERPENTIS ; OPACITIES ; INTERIOR
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被引频次:13[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6251
专题太阳物理研究组
中国科学院天体结构与演化重点实验室
通讯作者Meng, Y (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China
2.University of Chinese Academy of Sciences, Beijing 100039, China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
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Meng Y,Zhang QS,Meng, Y . CALIBRATING THE UPDATED OVERSHOOT MIXING MODEL ON ECLIPSING BINARY STARS: HY Vir, YZ Cas, chi(2) Hya, and VV Crv[J]. ASTROPHYSICAL JOURNAL,2014,787(2).
APA Meng Y,Zhang QS,&Meng, Y .(2014).CALIBRATING THE UPDATED OVERSHOOT MIXING MODEL ON ECLIPSING BINARY STARS: HY Vir, YZ Cas, chi(2) Hya, and VV Crv.ASTROPHYSICAL JOURNAL,787(2).
MLA Meng Y,et al."CALIBRATING THE UPDATED OVERSHOOT MIXING MODEL ON ECLIPSING BINARY STARS: HY Vir, YZ Cas, chi(2) Hya, and VV Crv".ASTROPHYSICAL JOURNAL 787.2(2014).
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