NAOC Open IR
恒星类太阳和类长周期变星脉动激发机制的理论探讨
熊大闰1; 邓李才2
2013
Source Publication天文学报
ISSN0001-5245
Volume54Issue:1Pages:20
Abstract利用一种非局部和非定常的恒星对流理论,计算了0.6~3.0 M⊙恒星演化模型的线性非绝热脉动.结果表明,赫罗图上脉动不稳定带右方的脉动不稳定的低温恒星可以分成2大类(群).一类由主序矮星、亚巨星和中低光度红巨星组成的类太阳振荡恒星,它们的中高阶(径向阶n_r≥12)p模是脉动不稳定的,而低阶(n_r≤5)模是脉动稳定的;另一类是由亮的红巨星和渐近巨星支星(AGB)组成的类长周期变星,它们的低阶模(n_r≤5)是脉动不稳定的,而高阶模(n_r≥12)却是脉动稳定的.能利用对流与脉动的耦合统一解释造父变星脉动不稳定带红边界、类太阳和类长周期变星脉动.对赫罗图右方的低温恒星的中低阶P模振荡,对流与脉动的耦合是主要的脉动激发和阻尼机制,而湍流的随机激发机制仅对类太阳振荡高阶p模重要.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/45098
Collection中国科学院国家天文台
Affiliation1.中国科学院紫金山天文台
2.中国科学院国家天文台
Recommended Citation
GB/T 7714
熊大闰,邓李才. 恒星类太阳和类长周期变星脉动激发机制的理论探讨[J]. 天文学报,2013,54(1):20.
APA 熊大闰,&邓李才.(2013).恒星类太阳和类长周期变星脉动激发机制的理论探讨.天文学报,54(1),20.
MLA 熊大闰,et al."恒星类太阳和类长周期变星脉动激发机制的理论探讨".天文学报 54.1(2013):20.
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