The beta Cephei instability strip
文献类型：期刊论文
| 作者 | Deng, L; Xiong, DR
|
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2001-11-01 |
| 卷号 | 327期号:3页码:881-887 |
| 关键词 | stars : early-type Hertzsprung-Russell (HR) diagram stars : oscillations stars : variables : other |
| ISSN号 | 0035-8711 |
| 英文摘要 | We carried out a series of linear stability analyses of the radial and low-degree non-radial p modes for stellar models with initial masses of 6-30 M-circle dot. The stellar models were computed by using convective overshoot distance d(over) = 0.10, 0.25 and 0.40 H-p. Our numerical results show that the beta Cephei instability strip forms a horn-shaped region pointing upwards near the main sequence on the Hertzsprung-Russell diagram (HRD). The lower part of the instability strip for the radial modes join the zero-age main-sequence (ZAMS) at M approximate to 8.0-10.5 M-circle dot, while the top of the instability strip extends up to M approximate to 15.5 M-circle dot. The instability strip for the non-radial modes is even wider. The overall instability strip is dominated by the radial and non-radial fundamental modes. The first overtone (the radial-order index n=1) is also pulsationally unstable. We have shown that the beta Cephei stability is almost independent of the overshoot parameter d(over) used for the stellar models, while it depends critically on the metal abundance. With decreasing metal abundance, the instability region shrinks and eventually disappears for Z less than or similar to 0.005. |
| 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] | B-TYPE STARS ; STELLAR ENVELOPES ; PULSATIONAL STABILITY ; TURBULENT CONVECTION ; VARIABLE-STARS ; OSCILLATIONS ; OPACITIES ; EQUATION ; STATE ; MODELS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000172046700018 |
| 公开日期 | 2015-04-20 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/11189]  |
| 专题 | 紫金山天文台_院士文集_熊大闰 |
| 作者单位 | 1.Chinese Acad Sci, Beijing Astron Observ, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Deng, L,Xiong, DR. The beta Cephei instability strip[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2001,327(3):881-887. |
| APA | Deng, L,&Xiong, DR.(2001).The beta Cephei instability strip.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,327(3),881-887. |
| MLA | Deng, L,et al."The beta Cephei instability strip".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 327.3(2001):881-887. |
入库方式： OAI收割
来源：紫金山天文台
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