arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2105.03349gr-qcastro-ph.COastro-ph.HEhep-ph
收藏

在LIGO/Virgo引力波数据中寻找原始黑洞的子种群

Searching for a subpopulation of primordial black holes in LIGO/Virgo gravitational-wave data

Gabriele Franciolini, Vishal Baibhav, Valerio De Luca, Ken K. Y. Ng, Kaze W. K. Wong, Emanuele Berti, Paolo Pani, Antonio Riotto, Salvatore Vitale

摘要:

迄今为止,LIGO/Virgo探测到了几十个双黑洞事件,预计未来几年还会有更多的双黑洞事件,引力波天文学正在从单个事件分析转向群体研究。使用GWTC-2目录,我们进行了分层贝叶斯分析,第一次结合了几个国家的最先进的天体物理形成模型与人口的原始黑洞(PBH)和约束的一个假定的子人口PBH的数据的分数。我们发现,这一部分显着依赖于一套假设的天体物理模型。虽然原始人口统计上有利于某些竞争性的天体物理通道,如球状星团和核星团,一个占主导地位的贡献,从稳定的质量转移孤立的形成通道大大减少了对PBH的需要,除了解释像GW 190521的质量间隙事件的速率。膨胀后形成的黑洞对LIGO/Virgo观测有贡献的诱人可能性只能通过进一步减少天体物理和原始形成模型的不确定性来验证,并且最终可能由第三代干涉仪证实。

英文摘要:

With several dozen binary black hole events detected by LIGO/Virgo to date and many more expected in the next few years, gravitational-wave astronomy is shifting from individual-event analyses to population studies. Using the GWTC-2 catalog, we perform a hierarchical Bayesian analysis that for the first time combines several state-of-the-art astrophysical formation models with a population of primordial black holes (PBHs) and constrains the fraction of a putative subpopulation of PBHs in the data. We find that this fraction depends significantly on the set of assumed astrophysical models. While a primordial population is statistically favored against certain competitive astrophysical channels, such as globular clusters and nuclear stellar clusters, a dominant contribution from the stable-mass-transfer isolated formation channel drastically reduces the need for PBHs, except for explaining the rate of mass-gap events like GW190521. The tantalizing possibility that black holes formed after inflation are contributing to LIGO/Virgo observations could only be verified by further reducing uncertainties in astrophysical and primordial formation models, and it may ultimately be confirmed by third-generation interferometers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑