Neutron star-black hole mergers in next generation gravitational-wave observatories
Neutron star-black hole mergers in next generation gravitational-wave observatories
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DOI：
10.1103/physrevd.107.124007
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发表时间：
2023-01
影响因子：
5
通讯作者：
I. Gupta;S. Borhanian;A. Dhani;D. Chattopadhyay;R. Kashyap;V. Villar;B. Sathyaprakash
中科院分区：
文献类型：
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作者：
I. Gupta;S. Borhanian;A. Dhani;D. Chattopadhyay;R. Kashyap;V. Villar;B. Sathyaprakash
当前一代引力波探测器的观测在扩大我们对宇宙的理解方面起到了关键作用。尽管已经观测到数十个令人兴奋的紧凑双星合并，但中子星-黑洞（NSBH）合并一直难以捉摸，直到2020年它们首次被自信地探测到。随着现有探测器灵敏度的提高和未来十年新天文台的建设，预计非黑洞探测的数量将会增加。在这项工作中，我们通过以下指标来探索这些升级后的探测器和新天文台的NSBH探测和测量能力：网络检测效率和检测率作为红移的函数，信噪比的分布，内在和外在参数的测量精度，天空位置测量精度，以及可以发送的预警警报数量，以方便电磁跟踪。此外，我们通过报告Vera C. Rubin天文台和Nancy Grace Roman太空望远镜预期的千新星探测数量，评估了对nshb系统进行多信使观测的前景。我们发现这两个望远镜每年可以探测到多达$\mathcal{O}(10)$千新星，这取决于非黑洞系统的人口和中子星的状态方程。
Observations by the current generation of gravitational-wave detectors have been pivotal in expanding our understanding of the universe. Although tens of exciting compact binary mergers have been observed, neutron star-black hole (NSBH) mergers remained elusive until they were first confidently detected in 2020. The number of NSBH detections is expected to increase with sensitivity improvements of the current detectors and the proposed construction of new observatories over the next decade. In this work, we explore the NSBH detection and measurement capabilities of these upgraded detectors and new observatories using the following metrics: network detection efficiency and detection rate as a function of redshift, distributions of the signal-to-noise ratios, the measurement accuracy of intrinsic and extrinsic parameters, the accuracy of sky position measurement, and the number of early-warning alerts that can be sent to facilitate the electromagnetic follow-up. Additionally, we evaluate the prospects of performing multi-messenger observations of NSBH systems by reporting the number of expected kilonova detections with the Vera C. Rubin Observatory and the Nancy Grace Roman Space Telescope. We find that as many as $\mathcal{O}(10)$ kilonovae can be detected by these two telescopes every year, depending on the population of the NSBH systems and the equation of state of neutron stars.