论文标题
超级质量黑洞附近的二进制中子星合并是否可以检测合并后重力波信号？
Can a binary neutron star merger in the vicinity of a supermassive black hole enable a detection of a post-merger gravitational wave signal?
论文作者
论文摘要
二进制中子星（BNS）合并的后重力波（GW）信号预计将包含有价值的信息，这些信息可能会阐明NSS的状态方程（EOS），合并期间产生的物质的特性，以及任何潜在的中间产品的性质，例如超大型或超质量或超质量或超质量NS。但是，邮递员在于当前Ligo-Virgo检测器不敏感的高频制度（$ \ gtrsim 1000 $ hz）。虽然提出的探测器，例如Nemo，Cosmic Explorer和Einstein望远镜，可能会在$ \ Mathcal {O}（10〜 \ Mathrm {MPC}）$中检测到BNSS的后验证器，但这些事件可能很少见。在这项工作中，我们推测可能从超级质量黑洞（SMBH）附近的BNSS结合的BNSS结合的可能性。 SMBH的重力场产生的红移以及BNS周围的适当运动可以有效地“伸展”后字母信号进入检测器的频带。我们使用现象学模型证明，这样的BNS结合将对邮政信号的峰值构成限制，只要可以独立获取SMBH引起的红色变成程度，否则就无法实现。我们进一步展示了此类合并如何使用Postmerger信号改善EOS模型选择。我们讨论可能提供此类事件的机制以及这项工作的局限性。
The postmerger gravitational-wave (GW) signal of a binary neutron star (BNS) merger is expected to contain valuable information that could shed light on the equation of state (EOS) of NSs, the properties of the matter produced during the merger, as well as the nature of any potential intermediate merger product such as hypermassive or supramassive NSs. However, the postmerger lies in the high frequency regime ($ \gtrsim 1000 $ Hz) where current LIGO-Virgo detectors are insensitive. While proposed detectors such as NEMO, Cosmic Explorer and Einstein Telescope could potentially detect the postmerger for BNSs within $\mathcal{O}(10~\mathrm{Mpc})$, such events are likely to be rare. In this work, we speculate on the possibility of detecting the postmerger from BNSs coalescing in the vicinity of supermassive black holes (SMBH). The redshift produced by the gravitational field of the SMBH, as well as the BNS's proper motion around the SMBH, could effectively "stretch" the postmerger signal into the band of the detectors. We demonstrate, using a phenomenological model, that such BNS coalescences would enable constraints on the peak of the postmerger signal that would otherwise have not been possible, provided the degree of redshifting due to the SMBH can be independently acquired. We further show how such mergers would improve EOS model selection using the postmerger signal. We discuss the mechanisms that might deliver such events, and the limitations of this work.
