论文标题
直接确定来自周围恒星质量黑洞二进制的超级质量黑洞特性
Direct determination of supermassive black hole properties with gravitational-wave radiation from surrounding stellar-mass black hole binaries
论文作者
论文摘要
大量的恒星质量黑洞（BH）二进制物可能在银河核或周围的气盘中合并。使用有目的的太空引力波观测器，我们可以将这样的二进制用作信号载体作为探测由中央超级BH（SMBH）引起的调制，这进一步使我们能够对SMBH的性质放置约束。我们特别显示了内部恒星二进制二进制轨道角动量（AM）周围AM周围AM周围的Sitter进动，如果进液期与观察持续时间相当，通常是几年。一旦检测到，可以将进动与由外轨道运动产生的多普勒移位组合，以分别确定SMBH和外轨道分离的质量，并且每个分离都具有百分比级别的精度。如果我们进一步假设由太空培养和地面检测器进行联合检测，则可以将可检测性阈值扩展到约100年的进动期。
A significant number of stellar-mass black-hole (BH) binaries may merge in galactic nuclei or in the surrounding gas disks. With purposed space-borne gravitational-wave observatories, we may use such a binary as a signal carrier to probe modulations induced by a central supermassive BH (SMBH), which further allows us to place constraints on the SMBH's properties. We show in particular the de Sitter precession of the inner stellar-mass binary's orbital angular momentum (AM) around the AM of the outer orbit will be detectable if the precession period is comparable to the duration of observation, typically a few years. Once detected, the precession can be combined with the Doppler shift arising from the outer orbital motion to determine the mass of the SMBH and the outer orbital separation individually and each with percent-level accuracy. If we further assume a joint detection by space-borne and ground-based detectors, the detectability threshold could be extended to a precession period of ~100 yr.
