论文标题
用深色中子星空孔合并测量哈勃常数
Measuring Hubble Constant with Dark Neutron Star-Black Hole Mergers
论文作者
论文摘要
Detection of gravitational waves (GWs) from neutron star-black hole (NSBH) standard sirens can provide local measurements of the Hubble constant ($H_0$), regardless of the detection of an electromagnetic (EM) counterpart: The presence of matter terms in GWs breaks the degeneracy between mass parameters and redshift, allowing simultaneous measurement of both the luminosity distance and redshift.尽管潮汐破坏的NSBH系统可能会产生EM排放，但在下一代GW检测器时代，EM对应物的检测前景将限制为$ z <0.8 $。但是，潮汐中断的NSBH的独特合并形态和高红移可检测性使它们成为这种方法的有希望的标准警报候选者。通过对NSS的最新限制NSS的限制，从MICER和LIGO/VIRGO/KAGRA的多通间观察结果中，我们显示了$ H_ {0} $的前景，仅从GW观察到NSBH系统，Einstein Telescope（Enscope（Et）和Cosmic Explorer（CE）（CE）CE（CE）。我们首先分析单个事件，以量化高频（$ \ ge $ 500 Hz）潮汐扭曲对NS潮汐变形参数推断（$λ$）的影响，因此对$ H_0 $。我们发现，颠覆性合并可以比非干扰性限制$λ$最高$ \ MATHCAL {O}（60 \％）$更精确。但是，此精度不足以在单个事件的$ H_0上放置严格的约束。通过对ET+CE检测器中的不同模拟NSBH数据进行贝叶斯分析（最高$ n = 100美元的事件，对应于从几个小时到每天观察的时间表），我们发现NSBH系统启用了无偏见的4 \％-13 \％的精度，估计为$ H__0 $ $ H__0 $ $（68 $ $ h_0 \％\％\％\％\％\％）。这是在分析LVKC O5时代与EM对应物的NSBH合并种群的研究中发现的类似测量精度。
Detection of gravitational waves (GWs) from neutron star-black hole (NSBH) standard sirens can provide local measurements of the Hubble constant ($H_0$), regardless of the detection of an electromagnetic (EM) counterpart: The presence of matter terms in GWs breaks the degeneracy between mass parameters and redshift, allowing simultaneous measurement of both the luminosity distance and redshift. Although the tidally disrupted NSBH systems can have EM emission, the detection prospects of an EM counterpart will be limited to $z < 0.8$ in the optical, in the era of the next generation GW detectors. However, the distinctive merger morphology and the high redshift detectability of tidally-disrupted NSBH makes them promising standard siren candidates for this method. Using recent constraints on the equation-of-state of NSs from multi-messenger observations of NICER and LIGO/Virgo/KAGRA, we show the prospects of measuring $H_{0}$ solely from GW observation of NSBH systems, achievable by Einstein Telescope (ET) and Cosmic Explorer (CE) detectors. We first analyze individual events to quantify the effect of high-frequency ($\ge$ 500 Hz) tidal distortions on the inference of NS tidal deformability parameter ($Λ$) and hence on $H_0$. We find that disruptive mergers can constrain $Λ$ up to $\mathcal{O}(60\%)$ more precisely than non-disruptive ones. However, this precision is not sufficient to place stringent constraints on the $H_0$ for individual events. By performing Bayesian analysis on different sets of simulated NSBH data (up to $N=100$ events, corresponding to a timescale from several hours to a day observation) in the ET+CE detectors, we find that NSBH systems enable unbiased 4\% - 13\% precision on the estimate of $H_0$ (68\% credible interval). This is a similar measurement precision found in studies analyzing populations of NSBH mergers with EM counterparts in the LVKC O5 era.
