论文标题
寻找二进制黑洞的宿主星系组和限制哈勃常数的应用
Hunting for the host galaxy groups of binary black holes and the application in constraining Hubble constant
论文作者
论文摘要
恒星质量二进制黑洞（SBBHS）共同产生的引力波（GW）信号的发现，为研究天体物理的起源和紧凑型二进制动力学发展的新窗口打开了一个新窗口。此外，这些GW事件可以视为限制各种宇宙参数的标准警报器。这两个问题都需要在GW探测器网络的空间分辨率的帮助下，对这些GW事件进行主机识别。在本文中，我们研究了各种检测器网络识别SBBHS宿主星系组的功能，而不是其宿主星系，这可以克服星系在暗物质中的适当运动在暗物质中的影响，以测量宇宙学参数。在我们的分析中，（0.01,0.1）$的SDSS DR7的组目录被视为应用程序的示例。我们发现，对于第二代（2G）检测器网络，可以确定$（0.7-6.9）$ SBBH的主机星系组，假设所有来源均为$ 30-30 \ M _ {\ odot} $ binaries，并且该网络中的所有五个检测器均在该网络中的100 \％\％\％。对于3G检测器网络，此数字变为$（3.9-40.0）$ yr $^{ - 1} $。如果这些GW事件是从主机Galaxy组的候选人中提取的，我们还会研究这些GW事件对Hubble常数$ H_0 $的潜在限制。我们发现，通过五年的全职观察，2G检测器网络有望给出$ΔH_0/h_0 \ sim（1 \％，4 \％）$的约束，如果考虑3G检测器网络，则可以较小两个订单。
The discovery of gravitational-wave (GW) signals, produced by the coalescence of stellar-mass binary black holes (SBBHs), opens a new window to study the astrophysical origins and dynamical evolutions of compact binaries. In addition, these GW events can be treated as the standard sirens to constrain various cosmological parameters. Both issues require the host identification for these GW events, with help of the spatial resolution of GW detector networks. In this paper, we investigate the capabilities of various detector networks for identifying the SBBHs' host galaxy groups, rather than their host galaxies, which can overcome the influence of galaxies' proper motions in dark matter halos for measuring the cosmological parameters. In our analysis, the group catalog of SDSS DR7 with redshift $z\in(0.01,0.1)$ is considered as an example of the application. We find that for the second-generation (2G) detector network, the host galaxy groups of around $(0.7-6.9)$ SBBHs can be identified per year assuming all sources are $30-30\ M_{\odot}$ binaries, and that all five detectors in the network are in lock 100\% of the time. For the 3G detector network, this number becomes $(3.9-40.0)$ yr$^{-1}$. We also investigate the potential constraint on the Hubble constant $H_0$ by these GW events, if their redshift information is extracted from the candidates of host galaxy groups. We find that, by five-year's full time observations, 2G detector network is expected to give a constraint of $ΔH_0/H_0\sim (1\%,4\%)$, which can be more than two order smaller if considering the 3G detector network.
