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BISYSTEM OSCILLATION-THEORY OF STARS .2. EXCITATION MECHANISMS
Li Y(李焱); LI, Y (reprint author), CHINESE ACAD SCI, YUNNAN OBSERV, POB 110, KUNMING 650011, PEOPLES R CHINA.
发表期刊ASTRONOMY & ASTROPHYSICS
1992-04
卷号257期号:1页码:145-152
产权排序第1完成单位
收录类别SCI
关键词Oscillations Of Stars Excitation Mechanisms
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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6361
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WOS记录号WOS:A1992HM10600015
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]WHITE-DWARFS ; AP STARS ; PULSATIONS ; CONVECTION
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9370
专题恒星物理研究组
通讯作者LI, Y (reprint author), CHINESE ACAD SCI, YUNNAN OBSERV, POB 110, KUNMING 650011, PEOPLES R CHINA.
作者单位Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, People's Republic of China
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GB/T 7714
Li Y,LI, Y . BISYSTEM OSCILLATION-THEORY OF STARS .2. EXCITATION MECHANISMS[J]. ASTRONOMY & ASTROPHYSICS,1992,257(1):145-152.
APA 李焱,&LI, Y .(1992).BISYSTEM OSCILLATION-THEORY OF STARS .2. EXCITATION MECHANISMS.ASTRONOMY & ASTROPHYSICS,257(1),145-152.
MLA 李焱,et al."BISYSTEM OSCILLATION-THEORY OF STARS .2. EXCITATION MECHANISMS".ASTRONOMY & ASTROPHYSICS 257.1(1992):145-152.
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