Anisotropies in the astrophysical gravitational-wave background: Predictions for the detection of compact binaries by LIGO and Virgo
Anisotropies in the astrophysical gravitational-wave background: Predictions for the detection of compact binaries by LIGO and Virgo
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天体物理引力波背景中的各向异性：LIGO 和 Virgo 探测致密双星的预测
DOI：
10.1103/physrevd.98.063501
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发表时间：
2018
影响因子：
5
通讯作者：
É. Slezak
中科院分区：
文献类型：
--
作者：
A. Jenkins;M. Sakellariadou;T. Regimbau;É. Slezak
我们建立了一个关于天体物理引力波背景(AGWB)的详细的各向异性模型，包括两个恒星质量黑洞(BBH)、两个中子星(BNS)或每个中子星(BHNS)的双星合并，它们有望成为LIGO-Virgo频带上最强的贡献。各向异性的角谱由$C_\ell$分量量化，使用两种互补的方法计算：(I)简单的封闭形式的解析表达式；(Ii)使用千禧年模拟的全天模拟光锥星系星表进行详细的数值研究。这两种方法在大角度尺度上非常一致，而在较小尺度上的不同之处在于顺序统一因子。这些各向异性的幅度比宇宙微波背景(CMB)温度下的各向异性大得多，证实了对这些各向异性进行建模是很重要的，并表明这是未来理论和观测工作的一个很有前途的途径。
We develop a detailed anisotropic model for the astrophysical gravitational-wave background (AGWB), including binary mergers of two stellar-mass black holes (BBH), two neutron stars (BNS), or one of each (BHNS), which are expected to be the strongest contributions in the LIGO-Virgo frequency band. The angular spectrum of the anisotropies, quantified by the $C_\ell$ components, is calculated using two complementary approaches: (i) a simple, closed-form analytical expression, and (ii) a detailed numerical study using an all-sky mock lightcone galaxy catalogue from the Millennium simulation. The two approaches are in excellent agreement at large angular scales, and differ by a factor of order unity at smaller scales. These anisotropies are considerably larger in amplitude than e.g. those in the temperature of the cosmic microwave background (CMB), confirming that it is important to model these anisotropies, and indicating that this is a promising avenue for future theoretical and observational work.
影响因子：
5
作者：
Abbott B
通讯作者：
Abbott B
影响因子：
8.6
作者：
Ajith, P.;Hannam, M.;Seiler, J.
通讯作者：
Seiler, J.