论文标题
应用宇宙学原理更好地探测二进制黑洞合并率的红移演变
Applying Cosmological Principle to Better Probe the Redshift Evolution of Binary Black Hole Merger Rate
论文作者
论文摘要
重力波告诉观察到的信号起源的可能距离。当对多个观测值组合进行合并时，将使用此信息进行合并速率的红移演变的建模。这是二进制黑洞人口分析的重要方面，预计将与宇宙的星形形成历史或星形簇的动态演变有着密切的联系。至少，它可以探测恒星形成与残余合并之间的时间延迟。但是，由于二进制的倾斜角和光度距离之间的脱落性，测得的光度距离具有很大的不确定性，这限制了我们精确测量合并红移分布的能力。在这封信中，我们表明，通过施加宇宙学原理，可以抑制这种不确定性，并更好地区分不同分布，以建模二进制黑洞合并率的红移演变。此外，我们表明，通过与不引起这种强加的分析进行比较，我们可以探测宇宙学原理。
Gravitational waves inform about the probable distances at which an observed signal originated. This information when combined over multiple observations is used in the modeling of the redshift evolution of the merger rate. This is an important aspect of binary black hole population analysis which is expected to have close ties with the star formation history of the universe or dynamical evolution of star clusters. At the least, it can probe the time delay between the star formation and merger of remnants. However, due to the degeneracy between the inclination angle of the binary and the luminosity distance, the measured luminosity distance has large uncertainty that limits our ability to precisely measure the redshift distribution of mergers. In this letter, we show that by imposing the cosmological principle it is possible to suppress this uncertainty and better discriminate between different distributions modeling the redshift evolution of binary black hole merger rate. Additionally, we show that by making a comparison with an analysis that does not make such imposition we can probe the cosmological principle.
