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arXiv 1903.04069astro-ph.HEgr-qc
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从黑洞双星的多波段观测中我们可以学到什么

What we can learn from multi-band observations of black hole binaries

Curt Cutler, Emanuele Berti, Karan Jani, Ely D. Kovetz, Lisa Randall, Salvatore Vitale, Kaze W. K. Wong, Kelly Holley-Bockelmann, Shane L. Larson, Tyson Littenb… 展开作者

Curt Cutler, Emanuele Berti, Karan Jani, Ely D. Kovetz, Lisa Randall, Salvatore Vitale, Kaze W. K. Wong, Kelly Holley-Bockelmann, Shane L. Larson, Tyson Littenberg, Sean T. McWilliams, Guido Mueller, Jeremy D. Schnittman, David H. Shoemaker, Michele Vallisneri

摘要:

LIGO/Virgo引力波(GW)干涉仪迄今已探测到10个合并的黑洞(BH)双星,其中一些质量比预期大得多。处于观测质量范围高端的恒星质量BH双星(具有“啁啾质量”${\cal M} \gtrsim 25 M_{\odot}$)应该在这些双星被地面GW探测器发现之前数年就可以被空间GW观测站探测到。本白皮书讨论了当空间和地面上的仪器观测到相同的双星时所产生的一些协同效应。我们考虑中等质量的黑洞双星(总质量$M \sim 10^2 -10^4 M_{\odot}$)以及恒星质量的黑洞双星。我们说明如何结合空间和地面的数据集可以打破简并,从而提高我们的理解二进制的物理参数。虽然早期的工作主要集中在天基观测站如何准确预测何时在地面上观察到一些合并,但反过来也很重要:陆基探测将使我们能够“更深入地挖掘”存档的天基数据,以自信地识别信噪比最初低于阈值的黑洞螺旋,从而使在两个波段中观察到的双星数量增加$\sim 4 - 7$。

英文摘要:

The LIGO/Virgo gravitational-wave (GW) interferometers have to-date detected ten merging black hole (BH) binaries, some with masses considerably larger than had been anticipated. Stellar-mass BH binaries at the high end of the observed mass range (with "chirp mass" ${\cal M} \gtrsim 25 M_{\odot}$) should be detectable by a space-based GW observatory years before those binaries become visible to ground-based GW detectors. This white paper discusses some of the synergies that result when the same binaries are observed by instruments in space and on the ground. We consider intermediate-mass black hole binaries (with total mass $M \sim 10^2 -10^4 M_{\odot}$) as well as stellar-mass black hole binaries. We illustrate how combining space-based and ground-based data sets can break degeneracies and thereby improve our understanding of the binary's physical parameters. While early work focused on how space-based observatories can forecast precisely when some mergers will be observed on the ground, the reverse is also important: ground-based detections will allow us to "dig deeper" into archived, space-based data to confidently identify black hole inspirals whose signal-to-noise ratios were originally sub-threshold, increasing the number of binaries observed in both bands by a factor of $\sim 4 - 7$.

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