Multiband gravitational-wave event rates and stellar physics
Multiband gravitational-wave event rates and stellar physics
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DOI：
10.1103/physrevd.99.103004
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发表时间：
2019-01
影响因子：
5
通讯作者：
D. Gerosa;Sizheng Ma;Ka-wah Wong;E. Berti;R. O’Shaughnessy;Yanbei Chen;K. Belczynski
中科院分区：
文献类型：
--
作者：
D. Gerosa;Sizheng Ma;Ka-wah Wong;E. Berti;R. O’Shaughnessy;Yanbei Chen;K. Belczynski
地面和空间观测站对恒星质量黑洞双星的联合引力波探测将为基础物理学和天文学提供前所未有的机会。我们提出了一种半分析方法来估计多波段事件率结合地面干涉仪（如LIGO/处女座）和空间任务（如丽莎）的选择效果。我们预测的多波段探测的预期数量，首先使用信息从目前的LIGO/室女座的数据，然后通过人口合成模拟的双星。我们估计，几个到几十个丽莎检测可以用来预测合并检测在地面上。相反，利用地面探测的先验信息，可以从丽莎数据流中提取数百个事件。一般来说，丽莎观测到的双星合并信号足够强，可以被当前和未来的地面探测器明确识别。因此，与LIGO/Virgo相比，第三代探测器不会增加多波段探测的数量。我们使用人口合成模拟孤立的双星探索一些恒星物理，可以约束与多波段事件，我们表明，特定的形成途径可能是多波段事件相比，地面只检测。
Joint gravitational-wave detections of stellar-mass black-hole binaries by ground- and space-based observatories will provide unprecedented opportunities for fundamental physics and astronomy. We present a semianalytic method to estimate multiband event rates by combining selection effects of ground-based interferometers (like LIGO/Virgo) and space missions (like LISA). We forecast the expected number of multiband detections first by using information from current LIGO/Virgo data, and then through population synthesis simulations of binary stars. We estimate that few to tens of LISA detections can be used to predict mergers detectable on the ground. Conversely, hundreds of events could potentially be extracted from the LISA data stream using prior information from ground detections. In general, the merger signal of binaries observable by LISA is strong enough to be unambiguously identified by both current and future ground-based detectors. Therefore third-generation detectors will not increase the number of multiband detections compared to LIGO/Virgo. We use population synthesis simulations of isolated binary stars to explore some of the stellar physics that could be constrained with multiband events, and we show that specific formation pathways might be overrepresented in multiband events compared to ground-only detections.