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arXiv 1909.05804gr-qcastro-ph.HE
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低质量间隙中的黑洞:对引力波观测的启示

Black holes in the low mass gap: Implications for gravitational wave observations

Pennsylvania State University(宾夕法尼亚州立大学);University of Birmingham(伯明翰大学);Chennai Mathematical Institute(金奈数学研究所);Johns Hopkins University(约翰斯·霍普金斯大学);Cardiff University(卡迪夫大学);Flatiron Institute(平顿研究所);Stony Brook University(石溪大学);The University of Mississippi(密西西比大学)

Anuradha Gupta, Davide Gerosa, K. G. Arun, Emanuele Berti, Will Farr, B. S. Sathyaprakash

AI总结:

本文研究低质量间隙中黑洞的形成及引力波观测特征,提出通过第三代引力波探测器发现该群体,并探讨中子星双高斯质量模型的可能性。

摘要:

双星中子星合并主要会产生质量约为3-4个太阳质量的黑洞残骸,从而填充中子星与恒星级黑洞之间的潜在低质量间隙。如果这些低质量黑洞处于密集的天体环境中,质量分层可能导致在哈勃时间尺度内形成

英文摘要:

Binary neutron-star mergers will predominantly produce black-hole remnants of mass $\sim 3-4\,M_{\odot}$, thus populating the putative \emph{low mass gap} between neutron stars and stellar-mass black holes. If these low-mass black holes are in dense astrophysical environments, mass segregation could lead to "second-generation" compact binaries merging within a Hubble time. In this paper, we investigate possible signatures of such low-mass compact binary mergers in gravitational-wave observations. We show that this unique population of objects, if present, will be uncovered by the third-generation gravitational-wave detectors, such as Cosmic Explorer and Einstein Telescope. Future joint measurements of chirp mass ${\cal M}$ and effective spin $χ_{\rm eff}$ could clarify the formation scenario of compact objects in the low mass gap. As a case study, we show that the recent detection of GW190425 (along with GW170817) favors a double Gaussian mass model for neutron stars, under the assumption that the primary in GW190425 is a black hole formed from a previous binary neutron star merger.

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。

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