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arXiv 2201.00369astro-ph.HEgr-qc
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致密星内原初黑洞的引力波发射:致密物质状态方程的新探索

Gravitational-wave Emission from a Primordial Black Hole Inspiraling inside a Compact Star: a Novel Probe for Dense Matter Equation of State

Ze-Cheng Zou, Yong-Feng Huang

摘要:

被致密恒星捕获的行星质量的原始黑洞被广泛研究,以限制它们的暗物质组成分数。这种捕获可能导致一个螺旋过程,并通过引力波信号被检测到。在这封信中,我们通过考虑两种不同类型的致密星,即,奇异星和中子星。对动力学方程进行了数值求解,计算了引力波发射。研究发现,先进的LIGO可以检测到$10^{-5}$太阳质量的原始黑洞在10千秒差距的距离,而木星质量的情况下,甚至可以检测到兆秒差距。有希望的是,下一代引力波探测器可以探测到$10^{-5}$太阳质量的原始黑洞,最高可达${\sim}1$ Mpc,并且可以探测到数百兆秒差距的木星质量的黑洞。此外,千赫兹引力波信号显示出奇异星和中子星的显著差异,这可能使其成为致密物质状态方程的新探测器。

英文摘要:

Primordial black holes of planetary masses captured by compact stars are widely studied to constrain their composition fraction of dark matter. Such a capture may lead to an inspiral process and be detected through gravitational wave signals. In this Letter, we study the post-capture inspiral process by considering two different kinds of compact stars, i.e., strange stars and neutron stars. The dynamical equations are numerically solved and the gravitational wave emission is calculated. It is found that the Advanced LIGO can detect the inspiraling of a $10^{-5}$ solar mass primordial black hole at a distance of 10 kpc, while a Jovian-mass case can even be detected at megaparsecs. Promisingly, the next generation gravitational wave detectors can detect the cases of $10^{-5}$ solar mass primordial black holes up to ${\sim}1$ Mpc, and can detect Jovian-mass cases at several hundred megaparsecs. Moreover, the kilohertz gravitational wave signal shows significant differences for strange stars and neutron stars, potentially making it a novel probe to the dense matter equation of state.

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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