论文标题
用Ligo-Virgo黑洞限制大型二进制恒星的积聚效率
Constraining accretion efficiency in massive binary stars with LIGO-Virgo black holes
论文作者
论文摘要
Ligo-virgo黑洞（BHS）的样本不断增长，为大规模二元进化的研究提供了新的观点。在这里，我们通过种群合成模拟研究了质量积聚效率和共同包膜对二元BH（BBH）合并性质的影响。我们用参数$ f _ {\ rm mt} \在[0.05,1] $中对质量积聚效率进行建模，这代表了供体损失的质量部分，而供体有效地被伴侣积聚。 $ f _ {\ rm mt} $的较低值会导致BBH合并率密度较低，并产生质谱偏向较低的BH质量。 Our hierarchical Bayesian analysis, applied to BBH mergers in the first and second gravitational wave transient catalogue, yields zero support for values of $f_{\rm MT}\lesssim{}0.6$, with a lower boundary of the 99\% credible intervals equal to $f_{\rm MT}= 0.59$.该结果适用于我们在[1,10] $中考虑的所有公共 - 内玻璃效率参数的值$α_ {\ rm ce} \。这证实重力波数据可用于对几个不确定的二进制演化过程进行约束。
The growing sample of LIGO--Virgo black holes (BHs) opens new perspectives for the study of massive binary evolution. Here, we study the impact of mass accretion efficiency and common envelope on the properties of binary BH (BBH) mergers, by means of population synthesis simulations. We model mass accretion efficiency with the parameter $f_{\rm MT}\in[0.05,1]$, which represents the fraction of mass lost from the donor which is effectively accreted by the companion. Lower values of $f_{\rm MT}$ result in lower BBH merger rate densities and produce mass spectra skewed towards lower BH masses. Our hierarchical Bayesian analysis, applied to BBH mergers in the first and second gravitational wave transient catalogue, yields zero support for values of $f_{\rm MT}\lesssim{}0.6$, with a lower boundary of the 99\% credible intervals equal to $f_{\rm MT}= 0.59$. This result holds for all the values of the common-envelope efficiency parameter we considered in this study $α_{\rm CE} \in [1,10]$. This confirms that gravitational-wave data can be used to put constraints on several uncertain binary evolution processes.
