Prospects for Measuring Off-axis Spins of Binary Black Holes with Plus-era Gravitational-wave Detectors
Prospects for Measuring Off-axis Spins of Binary Black Holes with Plus-era Gravitational-wave Detectors
复制标题
利用Plus时代引力波探测器测量双黑洞离轴自旋的前景
DOI：
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
M. Cabero
中科院分区：
文献类型：
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作者：
A. Knee;J. McIver;M. Cabero
从引力波特征中推断出的双黑洞（BBH）的质量和自旋性质揭示了这些系统如何形成的重要线索。来自孤立双星演化的BBH预计会优先与它们的轨道角动量对齐，而通过动力学组装形成的双星则没有这种偏好。在不久的将来，引力波探测器可以测量离轴自旋的保真度将对BBH形成通道的研究产生影响。在这项工作中，我们研究了高级LIGO Plus（A+）和高级Virgo Plus（AdV+）干涉探测器可以测量对齐和未对齐自旋的程度。我们比较了LIGO-Virgo网络在A+/AdV+（“Plus”）灵敏度或先进时代设计（“Design”）灵敏度下运行的自旋分辨率，使用模拟的BBH引力波信号注入合成探测器噪声。的信号分布在可能的BBH系统的质量自旋参数空间，占进动和高阶模式的影响。我们发现，加升级产生显着的改善自旋估计不平等的质量和中等或大自旋的系统。使用模拟信号建模后，不同类型的层次BBH合并，我们还得出结论，加检测器网络将产生显着改善的自旋估计为1G+2G二进制相比，设计网络。
The mass and spin properties of binary black holes (BBHs) inferred from their gravitational-wave signatures reveal important clues about how these systems form. BBHs originating from isolated binary evolution are expected to have spins preferentially aligned with their orbital angular momentum, whereas there is no such preference in binaries formed via dynamical assembly. The fidelity with which near-future gravitational-wave detectors can measure off-axis spins will have implications for the study of BBH formation channels. In this work, we examine the degree to which the Advanced LIGO Plus (A+) and Advanced Virgo Plus (AdV+) interferometric detectors can measure both aligned and misaligned spins. We compare spin resolution between the LIGO-Virgo network operating at either A+/AdV+ (“Plus”) sensitivity or Advanced-era design (“Design”) sensitivity using simulated BBH gravitational-wave signals injected into synthetic detector noise. The signals are distributed over the mass-spin parameter space of likely BBH systems, accounting for the effects of precession and higher-order modes. We find that the Plus upgrades yield significant improvements in spin estimation for systems with unequal masses and moderate or large spins. Using simulated signals modeled after different types of hierarchical BBH mergers, we also conclude that the Plus detector network will yield substantially improved spin estimates for 1G+2G binaries compared to the Design network.