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arXiv 0809.4789astro-ph
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热大质量恒星的质量损失和演化

Mass loss and evolution of hot massive stars

Jorick S. Vink

摘要:

我们讨论了质量损失的作用,最大质量的恒星的演化,突出的作用,预测的双稳定性跳跃,可能是相关的旋转速度的演变过程中或之后的主要序列。这一机制也被提出来解释从亮蓝变星(LBV)的风中看到的质量损失变化。这些可能与最近在一些过渡超新星(SNe)中看到的准正弦调制有关,也与最近在SN 2005 gj的H α线中发现的双穿透吸收剖面有关。最后,我们讨论了金属丰度的作用,通过Z-依赖的字符,他们的风,在初始和最终(沃尔夫-拉叶)阶段的演变,长伽马射线暴(GRB)的祖星的角动量演化的影响。

英文摘要:

We discuss the role of mass loss for the evolution of the most massive stars, highlighting the role of the predicted bi-stability jump that might be relevant for the evolution of rotational velocities during or just after the main sequence. This mechanism is also proposed as an explanation for the mass-loss variations seen in the winds from Luminous Blue Variables (LBVs). These might be relevant for the quasi-sinusoidal modulations seen in a number of recent transitional supernovae (SNe), as well as for the double-throughed absorption profile recently discovered in the Halpha line of SN 2005gj. Finally, we discuss the role of metallicity via the Z-dependent character of their winds, during both the initial and final (Wolf-Rayet) phases of evolution, with implications for the angular momentum evolution of the progenitor stars of long gamma-ray bursts (GRBs).

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