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arXiv 0711.3079astro-ph
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大质量双星对恒星星族和超新星祖先的影响

The effect of massive binaries on stellar populations and supernova progenitors

John J. Eldridge, Robert G. Izzard, Christopher A. Tout

摘要:

我们比较我们最新的单星和双星模型的结果,从剑桥星代码的几组观测。我们研究了四个恒星星族比,蓝红超巨星的数量,沃尔夫-拉叶星的数量O超巨星,红超巨星的数量沃尔夫-拉叶星和沃尔夫-拉叶亚型,WC到WN星的相对数量。这四个比率提供了一个定量的测量核燃烧寿命和质量损失的重要性,在不同阶段的恒星的生命。此外,我们将我们的模型与Ib/c型超新星和II型超新星的相对速率进行比较,以测量所有恒星在整个生命周期中的质量损失量。我们发现合理的观测推断值和我们的预测值之间的协议,通过混合单,双星人口。然而,有证据表明,需要额外的质量损失来进一步改善协议,以减少红超巨星的数量并增加沃尔夫-拉叶星的数量。

英文摘要:

We compare our latest single and binary stellar model results from the Cambridge STARS code to several sets of observations. We examine four stellar population ratios, the number of blue to red supergiants, the number of Wolf-Rayet stars to O supergiants, the number of red supergiants to Wolf-Rayet stars and the relative number of Wolf-Rayet subtypes, WC to WN stars. These four ratios provide a quantitative measure of nuclear burning lifetimes and the importance of mass loss during various stages of the stars' lifetimes. In addition we compare our models to the relative rate of type Ib/c to type II supernovae to measure the amount of mass lost over the entire lives of all stars. We find reasonable agreement between the observationally inferred values and our predicted values by mixing single and binary star populations. However there is evidence that extra mass loss is required to improve the agreement further, to reduce the number of red supergiants and increase the number of Wolf-Rayet stars.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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