黑洞的引力波反冲振荡：对活动星系核统一模型的启示
Gravitational Wave Recoil Oscillations of Black Holes: Implications for Unified Models of Active Galactic Nuclei
摘要：
本文讨论了活动星系核统一模型中引力波反冲的结果。引力波反冲后星系核周围的超大质量黑洞的空间振荡意味着超大质量黑洞在远离核的时间中有很大一部分时间是在分子遮蔽环面之外的尺度上度过的。假设反冲速度的合理分布，我们计算了（本质上2型）类星体的离核时标。我们发现，大约有一半的主要合并的结果在SMBH被取代超过环面的时间为30万年或更长，可比类星体活动的时间尺度。由于主要的合并是最强烈的影响GW反冲，我们的研究结果意味着不足的2型类星体相比，塞弗特2星系。本文还讨论了反冲振荡对活动星系核可观测性质的其它影响。
英文摘要：
We consider the consequences of gravitational wave recoil for unified models of active galactic nuclei (AGNs). Spatial oscillations of supermassive black holes (SMBHs) around the cores of galaxies following gravitational wave (GW) recoil imply that the SMBHs spend a significant fraction of time off-nucleus, at scales beyond that of the molecular obscuring torus. Assuming reasonable distributions of recoil velocities, we compute the off-core timescale of (intrinsically type-2) quasars. We find that roughly one-half of major mergers result in a SMBH being displaced beyond the torus for a time of 30 Myr or more, comparable to quasar activity timescales. Since major mergers are most strongly affected by GW recoil, our results imply a deficiency of type 2 quasars in comparison to Seyfert 2 galaxies. Other consequences of the recoil oscillations for the observable properties of AGNs are also discussed.
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