Pulsations in hot supergiants
Pulsations in hot supergiants
复制标题
热超巨星中的脉动
DOI：
10.1017/s1743921313014518
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
-A.
中科院分区：
文献类型：
--
作者：
Godart;M.;Grotsch-Noels;A. & Dupret;M;-A.
大质量恒星是塑造和驱动我们宇宙的宇宙引擎。许多问题，如它们的形成、稳定性和质量损失效应，还远未完全了解。最近的地面和空间观测表明，质量较大的MS和后MS恒星中存在脉动，例如由κ机制激发的声学和重力模式，甚至是类似太阳的振荡。理论研究强调了大质量模型中奇异模式的存在，最近的理论分析表明，热超巨星可以在振荡对流模式中脉动。我们回顾了大质量恒星的不稳定性区域及其激发机制，并给出了最新的结果。
Massive stars are the cosmic engines that shape and drive our Universe. Many issues such as their formation, their stability and the mass loss effects, are far from being completely understood. Recent ground-based and space observations have shown pulsations in massive MS and post-MS stars, such as acoustic and gravity modes excited by the κ-mechanism and even solar-like oscillations. Theoretical studies emphasized the presence of strange modes in massive models, and recent theoretical analyses have shown that hot supergiants can pulsate in oscillatory convective modes. We review the instability domains of massive stars as well as their excitation mechanisms and present the latest results.