论文标题
超级质量黑洞周围的黑洞二进制文件的出生，生命和死亡：引力波源的动态演变
Birth, life, and death of black hole binaries around supermassive black holes: dynamical evolution of gravitational wave sources
论文作者
论文摘要
在本文中，我们探讨了调节超级黑洞（SMBHS）周围恒星黑洞二进制（BHB）的形成和演变的机制。我们表明，如果SMBH被大规模的核簇（NC）包围，那么动态相互作用可以有效地驱动“原位” BHB形成，而轨道隔离的恒星簇可以在SMBH为主的核中补充BHB储层。我们讨论了恒星硬化和质量分离的综合作用如何雕刻BHB轨道特性。我们使用直接的N体模拟，包括最多2.5顺序的Newtonian校正来研究BHB-SMBH相互作用，表明Kozai-Lidov机制在缩短二进制寿命中起着至关重要的作用。我们发现，合并概率弱取决于$ 10^6-10^9 {\ rm〜m} _ \ odot $质量范围，从而导致合并速率$γ\ simeq 3-8 $ yr $^{ - 1} $ gpc $ gpc $^{ - gpc $^{ - 3} $以redshift零。将近$ 40 \％的合并中有“ BH质量差距”中的质量，$ 50-140 {\ rm〜m} _ \ odot $，因此表明银河系是在此质量范围内形成BHS的理想场所。我们认为，带有组件质量的重力波（GW）源$ m_1> 40 {\ rm〜m} _ \ odot $和$ m_2 <30 {\ rm〜m} _ \ odot $将代表一个有力的银河系核。这些合并中的大多数可能是本地宇宙中的多频道GW来源：Lisa可能会看到近40美元\％$作为怪异来源，几年后，Ligo和Einstein望远镜的圆形来源，Einstein望远镜的圆形来源，使Decihertz Observoratories在Bride bride brick of the Binary Inspriment binary Inspriment brindy Instruments brade bride binary binary simels of binary simels of binary simels of binary simels of binary simels of binary simperal shimbinary simels inservations of。
In this paper, we explore the mechanisms that regulate the formation and evolution of stellar black hole binaries (BHBs) around supermassive black holes (SMBHs). We show that dynamical interactions can efficiently drive "in-situ" BHB formation if the SMBH is surrounded by a massive nuclear cluster (NC), while orbitally segregated star clusters can replenish the BHB reservoir in SMBH-dominated nuclei. We discuss how the combined action of stellar hardening and mass segregation sculpts the BHB orbital properties. We use direct N-body simulations including post-Newtonian corrections up to 2.5 order to study the BHB-SMBH interplay, showing that the Kozai-Lidov mechanism plays a crucial role in shortening binaries lifetime. We find that the merging probability weakly depends on the SMBH mass in the $10^6-10^9{\rm ~M}_\odot$ mass range, leading to a merger rate $Γ\simeq 3-8$ yr$^{-1}$ Gpc$^{-3}$ at redshift zero. Nearly $40\%$ of the mergers have masses in the "BH mass gap", $50-140{\rm ~M}_\odot$, thus indicating that galactic nuclei are ideal places to form BHs in this mass range. We argue that gravitational wave (GW) sources with components mass $m_1>40{\rm ~M}_\odot$ and $m_2<30{\rm ~M}_\odot$ would represent a strong indicator of a galactic nuclei origin. The majority of these mergers could be multiband GW sources in the local Universe: nearly $40\%$ might be seen by LISA as eccentric sources and, a few years later, as circular sources by LIGO and the Einstein Telescope, making decihertz observatories like DECIGO unique instruments to bridge the observations during the binary inspiral.
