论文标题
化学均匀的进化：种群快速合成方法
Chemically Homogeneous Evolution: A rapid population synthesis approach
论文作者
论文摘要
我们探索化学均匀的进化（CHE），作为大规模合并二进制黑洞（BBHS）的形成通道。我们开发了将CHE包括在快速二元种群合成代码，紧凑的对象合并中的方法：人口天体物理学和统计（Compas），将二元进化的现实模型与宇宙恒星形成历史的宇宙学模型相结合。我们第一次同时在相同的假设下同时探索常规的孤立二元星星进化。这种方法使我们能够限制人口特性，并同时预测CHE和常规形成通道的BBH合并的重力波检测率。可检测到的BBHS的总体质量分布与现有的重力波观测一致。我们发现，CHE通道可能会产生来自孤立二进制进化的BBH合并的所有重力波检测的约70％。
We explore chemically homogeneous evolution (CHE) as a formation channel for massive merging binary black holes (BBHs). We develop methods to include CHE in a rapid binary population synthesis code, Compact Object Mergers: Population Astrophysics and Statistics (COMPAS), which combines realistic models of binary evolution with cosmological models of the star-formation history of the Universe. For the first time, we simultaneously explore conventional isolated binary star evolution under the same set of assumptions. This approach allows us to constrain population properties and make simultaneous predictions about the gravitational-wave detection rates of BBH mergers for the CHE and conventional formation channels. The overall mass distribution of detectable BBHs is consistent with existing gravitational-wave observations. We find that the CHE channel may yield up to ~70% of all gravitational-wave detections of BBH mergers coming from isolated binary evolution.
