论文标题
研究从核星簇中的黑洞之间的单二元相遇引力辐射的可检测性：双曲线蝇的情况
Study on the detectability of gravitational radiation from single-binary encounters between black holes in nuclear star cluster: the case of hyperbolic flybys
论文作者
论文摘要
随着第三重力波瞬态目录的释放（GWTC-3），通过处女座和Ligo探测器对紧凑型二元合并的90次观察得出。这些合并中的一些被怀疑是在星团中发生的。这些簇的岩心的黑洞密度如此之高，以至于合并可以通过几代人形成越来越大的黑洞发生。这些条件还使三个黑洞可以通过单双二元相遇进行相互作用。在本文中，我们提出了第一个研究，即在核星团（NSC）中可能发生这种相遇的频率是红移的函数，以及这些相遇是否可以通过重力波（GW）探测器观察到。这项研究着重于有效的双曲线遭遇，忽略了谐振遇到的相遇。我们发现，在NSC中，与二进制合并相比很少发生，并且双曲线的相遇最有可能在陆地GW探测器的观察带以下产生最强的GW发射。虽然预计其中几个在丽莎频带中每年发生，但它们的幅度很低，而丽莎的检测似乎不可能。
With the release of the third Gravitational-Wave Transient Catalogue (GWTC-3), 90 observations of compact-binary mergers by Virgo and LIGO detectors are confirmed. Some of these mergers are suspected to have occurred in star clusters. The density of black holes at the cores of these clusters is so high that mergers can occur through a few generations forming increasingly massive black holes. These conditions also make it possible for three black holes to interact, most likely via single-binary encounters. In this paper, we present a first study of how often such encounters can happen in nuclear star clusters (NSCs) as a function of redshift, and whether these encounters are observable by gravitational-wave (GW) detectors. This study focuses on effectively hyperbolic encounters leaving out the resonant encounters. We find that in NSCs single-binary encounters occur rarely compared to binary mergers, and that hyperbolic encounters most likely produce the strongest GW emission below the observation band of terrestrial GW detectors. While several of them can be expected to occur per year with peak energy in the LISA band, their amplitude is low, and detection by LISA seems improbable.
