ASTEROSEISMIC ANALYSIS OF THE CoRoT TARGET HD 49933
文献类型：期刊论文
| 作者 | Liu, Zhie1; Yang, Wuming1,2; Bi, Shaolan1; Tian, Zhijia1; Liu, Kang1; Ge, Zhishuai1; Yu, Jie1; Li, Tanda3 ; Tan, Xiaoyan2; He, Xin1
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2014-01-10 |
| 卷号 | 780期号:2 |
| 关键词 | stars: evolution stars: interiors stars: oscillations (including pulsations) |
| 英文摘要 | The frequency ratios r(10) and r(01) of HD 49933 exhibit an increase at high frequencies. This behavior also exists in the ratios of other stars, which is considered to result from the low signal-to-noise ratio and the larger linewidth at the high-frequency end and could not be predicted by stellar models in previous work. Our calculations show that the behavior not only can be reproduced by stellar models, but can be predicted by asymptotic formulas of the ratios. The frequency ratios of the Sun, too, can be reproduced well by the asymptotic formulas. The increased behavior derives from the fact that the gradient of mean molecular weight at the bottom of the radiative region hinders the propagation of p-modes, while the hindrance does not exist in the convective core. This behavior should exist in the ratios of stars with a large convective core. The characteristic of the ratios at high frequencies provides a strict constraint on stellar models and aids in determining the size of the convective core and the extent of overshooting. Observational constraints point to a star with M = 1.28 +/- 0.01 M-circle dot, R = 1.458 +/- 0.005 R-circle dot, t = 1.83 +/- 0.1 Gyr, r(cc) = 0.16 +/- 0.02 R-circle dot, alpha = 1.85 +/- 0.05, and delta(ov) = 0.6 +/- 0.2 for HD 49933. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000329097100039 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6504]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 2.Henan Polytech Univ, Sch Phys & Chem, Jiaozuo 454000, Henan, Peoples R China 3.Chinese Acad Sci, Key Lab Solar Activ, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Zhie,Yang, Wuming,Bi, Shaolan,et al. ASTEROSEISMIC ANALYSIS OF THE CoRoT TARGET HD 49933[J]. ASTROPHYSICAL JOURNAL,2014,780(2). |
| APA | Liu, Zhie.,Yang, Wuming.,Bi, Shaolan.,Tian, Zhijia.,Liu, Kang.,...&Chintarungruangchai, P..(2014).ASTEROSEISMIC ANALYSIS OF THE CoRoT TARGET HD 49933.ASTROPHYSICAL JOURNAL,780(2). |
| MLA | Liu, Zhie,et al."ASTEROSEISMIC ANALYSIS OF THE CoRoT TARGET HD 49933".ASTROPHYSICAL JOURNAL 780.2(2014). |
入库方式： OAI收割
来源：国家天文台
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