论文标题
放置锚：了解具有随机和对齐旋转方向的二进制黑洞的种群
Dropping Anchor: Understanding the Populations of Binary Black Holes with Random and Aligned Spin Orientations
论文作者
论文摘要
二进制文件中黑洞（BHS）的相对自旋取向编码其进化史：动态组装的BHS应该具有各向异性分布的旋转，而源自田间的BHS的自旋应与轨道角动量对齐。在本文中，我们介绍了这些动力学和场二进制文件的简单种群模型，该模型使用旋转方向作为锚定，以解开这两个进化通道。然后，我们分析了第三个重力波瞬态目录（GWTC-3）中的二进制BH合并，并询问来自各向同性旋转种群的BHS是否具有不同的质量比，自旋幅度或从优先纠纷的Spin群体的质量比，自旋幅度或重新缩短的分布。我们没有发现令人信服的证据表明，GWTC-3中的二进制BHS取决于它们的自旋对齐，具有不同的源质体分布，但是我们确实发现动力学和野外通道不能均具有强烈支持相等质量的质量比率分布。我们举例说明了如何使用它来提供有关驱动这些BHS合并的各种过程的见解。我们还发现，当前的检测不足以提取各向同性和对齐旋转群体的自旋幅度或红移分布的差异。
The relative spin orientations of black holes (BHs) in binaries encode their evolutionary history: BHs assembled dynamically should have isotropically distributed spins, while spins of the BHs originating in the field should be aligned with the orbital angular momentum. In this article, we introduce a simple population model for these dynamical and field binaries that uses spin orientations as an anchor to disentangle these two evolutionary channels. We then analyze binary BH mergers in the Third Gravitational-Wave Transient Catalog (GWTC-3) and ask whether BHs from the isotropic-spin population possess different distributions of mass ratio, spin magnitudes, or redshifts from the preferentially-aligned-spin population. We find no compelling evidence that binary BHs in GWTC-3 have different source-property distributions depending on their spin alignment, but we do find that the dynamical and field channels cannot both have mass-ratio distributions that strongly favor equal masses. We give an example of how this can be used to provide insights into the various processes that drive these BHs to merge. We also find that the current detections are insufficient in extracting differences in spin magnitude or redshift distributions of isotropic and aligned spin populations.
