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arXiv 2404.03328astro-ph.COgr-qchep-ph
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亚太阳质量引力波候选体SSM200308的原初黑洞解释

Primordial Black Hole Interpretation in Subsolar Mass Gravitational Wave Candidate SSM200308

Chen Yuan, Qing-Guo Huang

AI总结:

本研究通过贝叶斯分析探讨原初黑洞能否解释亚太阳质量引力波候选体SSM200308,发现其并合率可与观测相符,但标量诱导引力波超出脉冲星计时阵列约束,挑战了该模型。

摘要:

在LIGO-Virgo-KAGRA合作组织的第三次观测运行的第二部分中,报告了一个具有亚太阳质量分量的候选体,我们将其标记为SSM200308。本研究探讨了由高斯扰动坍缩产生的原初黑洞(PBHs)能够解释SSM200308的前提。通过贝叶斯分析,我们获得了原初曲率功率谱,该功率谱使得PBH的并合率与观测数据一致,只要它们构成暗物质的$f_{\mathrm{PBH}}=5.66^{+58.68}_{-5.44}\times 10^{-2}$。然而,虽然来自双PBH并合的引力波(GW)背景在当前观测限制之内,但与PBH形成相关的标量诱导引力波超过了脉冲星计时阵列施加的约束,这对高斯扰动坍缩PBH模型作为SSM200308的来源提出了挑战。

英文摘要:

In the recent second part of the third observation run by the LIGO-Virgo-KAGRA collaboration, a candidate with sub-solar mass components was reported, which we labelled as SSM200308. This study investigates the premise that primordial black holes (PBHs), arising from Gaussian perturbation collapses, could explain SSM200308. Through Bayesian analysis, we obtain the primordial curvature power spectrum that leads to the merger rate of PBHs aligning with observational data as long as they constitute {$f_{\mathrm{PBH}}=5.66^{+58.68}_{-5.44}\times 10^{-2}$ } of the dark matter. However, while the gravitational wave (GW) background from binary PBH mergers is within current observational limits, the scalar-induced GWs associated with PBH formation exceed the constraints imposed by pulsar timing arrays, challenging the Gaussian perturbation collapse PBH model as the source of SSM200308.

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