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脉动稳定性对恒星对流包层氦丰度的依赖
熊大闰; 邓李才; 王坤
2014
Source Publication天文学报
ISSN0001-5245
Volume55Issue:4Pages:279-287
Abstract捅姜利用一种非局部和非定常的恒星对流理论,计算了3种不同氦丰度(Y=0.28,0.13,0.00)、太阳金属丰度(Z=0.02)、质量1.4~3.0 M_☉恒星演化模型的径向和低球谐阶F-p8模的线性非绝热脉动.数值计算结果表明,理论的δScuti变星脉动不稳定区红边界几乎不随氦丰度变化而改变.随着氦丰度降低,δScuti变星脉动不稳定区蓝边界向低温方向推移,脉动不稳定区中热方的高温星变得脉动更稳定;而冷方的低温星则变得脉动更不稳定.这似乎表明不大可能用氦弥散去解释δScuti脉动不稳定带中的不变星.然而脉动不稳定带热方和冷方中的不变星与变星的比例可能作为是否存在氦弥散的一种观测证据.
Keyword恒星 变星 δ Scuti型星 恒星 脉动 恒星 丰度 对流
Subject Area天文和天体物理
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/11226
Collection院士文集_熊大闰
Recommended Citation
GB/T 7714
熊大闰,邓李才,王坤. 脉动稳定性对恒星对流包层氦丰度的依赖[J]. 天文学报,2014,55(4):279-287.
APA 熊大闰,邓李才,&王坤.(2014).脉动稳定性对恒星对流包层氦丰度的依赖.天文学报,55(4),279-287.
MLA 熊大闰,et al."脉动稳定性对恒星对流包层氦丰度的依赖".天文学报 55.4(2014):279-287.
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