CALIBRATING THE UPDATED OVERSHOOT MIXING MODEL ON ECLIPSING BINARY STARS: HY Vir, YZ Cas, chi(2) Hya, and VV Crv
文献类型：期刊论文
| 作者 | Meng Y(蒙盈)1,2 ; Zhang QS(张钱生)1,3
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2014-06-01 |
| 卷号 | 787期号:2 |
| 关键词 | binaries: eclipsing convection stars: evolution |
| ISSN号 | 0004-637X |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Meng, Y (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | TURBULENT CONVECTION MODEL ; MASSIVE STARS ; ABSOLUTE PROPERTIES ; STELLAR EVOLUTION ; NONLOCAL CONVECTION ; HELIOSEISMOLOGY ; CONSTRAINTS ; SERPENTIS ; OPACITIES ; INTERIOR |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-637X/787/2/127/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000336246700032 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/6251]  |
| 专题 | 云南天文台_太阳物理研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 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 |
| 推荐引用方式 GB/T 7714 | Meng Y,Zhang QS. 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.(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). |
入库方式： OAI收割
来源：云南天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。