BISYSTEM OSCILLATION-THEORY OF STARS .2. EXCITATION MECHANISMS
文献类型：期刊论文
| 作者 | Li Y(李焱)
|
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 1992-04 |
| 卷号 | 257期号:1页码:145-152 |
| 关键词 | OSCILLATIONS OF STARS EXCITATION MECHANISMS |
| ISSN号 | 0004-6361 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | LI, Y (reprint author), CHINESE ACAD SCI, YUNNAN OBSERV, POB 110, KUNMING 650011, PEOPLES R CHINA. |
| 英文摘要 | The excitation mechanisms of the stellar oscillation due to the interaction of the gas with the radiation are investigated according to the bisystem oscillation theory. The equation for the temporal variation in the kinetic energy of the oscillation and the expression for the work integral valid in the nonequilibrium diffusion are derived. It is found that the excitation mechanisms, which transform the radiation energy into the oscillation one, are of two types, i.e. the "modulation" mechanism and "frozen temperature" mechanism, which result from the nonequilibrium between the gas and radiation. The former is due to the modulation of the process that the gas absorbs or emits the radiation in the unperturbed state by the opacity perturbation, and the latter is due to the nonequilibrium of the gas and radiation produced by the oscillation. Through the careful examination of some previously proposed excitation mechanisms, it is found that the kappa-mechanism and gamma-mechanism belong to the frozen temperature mechanism, and the convective blocking mechanism belongs to the modulation mechanism, though their operating processes were not correctly understood before. However, no mechanism has been found in the bisystem oscillation theory which corresponds to the r-mechanism or bump mechanism, which indicates that these two kinds of excitation mechanism are not real. |
| 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] | WHITE-DWARFS ; AP STARS ; PULSATIONS ; CONVECTION |
| 收录类别 | SCI |
| 原文出处 | http://adsabs.harvard.edu/abs/1992A%26A...257..145L |
| 语种 | 英语 |
| WOS记录号 | WOS:A1992HM10600015 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9370]  |
| 专题 | 云南天文台_恒星物理研究组 |
| 作者单位 | Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Li Y. BISYSTEM OSCILLATION-THEORY OF STARS .2. EXCITATION MECHANISMS[J]. ASTRONOMY & ASTROPHYSICS,1992,257(1):145-152. |
| APA | 李焱.(1992).BISYSTEM OSCILLATION-THEORY OF STARS .2. EXCITATION MECHANISMS.ASTRONOMY & ASTROPHYSICS,257(1),145-152. |
| MLA | 李焱."BISYSTEM OSCILLATION-THEORY OF STARS .2. EXCITATION MECHANISMS".ASTRONOMY & ASTROPHYSICS 257.1(1992):145-152. |
入库方式： OAI收割
来源：云南天文台
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