论文标题
已解决的恒星种群和超新星类型比率的二元分数指标
Binary Fraction Indicators in Resolved Stellar Populations and Supernova Type Ratios
论文作者
论文摘要
恒星种群的二元分数可能会对其性质产生明显的影响，尤其是不同大型恒星类型的数量计数，以及结束生命的超新星的相对亚型率。在这里，我们使用具有二元分数的二元种群合成模型，该模型随初始质量而变化，以测试对解决的恒星种群和超新星的影响，并询问这些对不同的质量和金属性方案中知名的二元分数是否可以约束。我们表明，Wolf-Rayet Star子类型比率是有价值的二进制诊断，但需要大量样品来区分模型。探索了恒星模型将被归类为狼射线星的不确定性。热核，剥离的包膜和其他核心折叠超新星的比率可能证明更容易获得的测试，即将进行的调查足以限制Z <1星系群中高质量和低质量分数。
The binary fraction of a stellar population can have pronounced effects on its properties, and in particular the number counts of different massive star types, and the relative subtype rates of the supernovae which end their lives. Here we use binary population synthesis models with a binary fraction that varies with initial mass to test the effects on resolved stellar populations and supernovae, and ask whether these can constrain the poorly-known binary fraction in different mass and metallicity regimes. We show that Wolf-Rayet star subtype ratios are valuable binary diagnostics, but require large samples to distinguish by models. Uncertainties in which stellar models would be spectroscopically classified as Wolf-Rayet stars are explored. The ratio of thermonuclear, stripped envelope and other core-collapse supernovae may prove a more accessible test and upcoming surveys will be sufficient to constrain both the high mass and low mass binary fraction in the z < 1 galaxy population.
