上部主序星非径向脉动不稳定模

摘要

根据非局部和非定常恒星对流理论,计算了质量3～30 M⊙恒星演化模型低球谐阶(l=1～4)p4～g39非径向模的线性非绝热脉动,研究了对流对非径向脉动的影响.结果表明,对流对恒星非径向脉动稳定性有不可忽略的影响.然而假若不关注单个恒星和单个振动模的细节,从总体上粗略地看,理论的脉动不稳定区的大致位置和范围并未受到对流的明显影响.%Using a non-local and time-dependent theory of convection, the linear stability of p4 ～ g39 modes in the upper MS (main sequence) for e = 1 ～ 4 is analyzed. The influences of convection on the pulsation stability of nonradial modes are studied. The results show that the influences of convection are not negligible. However, in general, convection has no significant influence on the location and scope of instability strip if the details of the single stellar model and oscillation mode are not concerned.