Evidence for the evolution of black hole mass function with redshift
arxiv(2023)
摘要
We investigate the joint primary mass, mass ratio, and redshift observed
distribution of astrophysical black holes using the gravitational wave events
detected by the LIGO-Virgo-KAGRA collaboration and included in the third
gravitational wave transient catalogue. We reconstruct this distribution using
Bayesian non-parametric methods, which are data-driven models able to infer
arbitrary probability densities under minimal mathematical assumptions. We find
evidence for the evolution with redshift of both the primary mass and mass
ratio distribution: our analysis shows the presence of two distinct
sub-populations in the primary mass - redshift plane, with the lighter
population, ≲ 20 M_⊙, disappearing at higher redshifts, z >
0.4. The mass ratio distribution shows no support for symmetric binaries. The
observed population of coalescing binary black holes evolves with look-back
time, suggesting a trend in metallicity with redshift and/or the presence of
multiple, redshift-dependent formation channels.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要