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Motivated by the recent detection of gravitational waves from the black hole binary merger GW150914, we study the dynamical evolution of black holes in galactic nuclei where massive star clusters reside. With masses of ~10^7M_Sun and sizes…

高能天体物理现象 · 物理学 2016-11-15 Fabio Antonini , Frederic A. Rasio

Coalescing black hole (BH) binaries forming in the dense core of globular clusters (GCs) are expected to be one the brightest sources of gravitational wave (GW) radiation for the next generation of ground-based laser interferometers.…

高能天体物理现象 · 物理学 2015-06-16 Fabio Antonini , Norman Murray , Seppo Mikkola

We explore the effects of long term secular perturbations on the distribution of dark matter particles around Supermassive Black Hole (BH) binaries. We show that in the hierarchical (in separation) three-body problem, one of the BHs and a…

星系天体物理 · 物理学 2015-06-22 Smadar Naoz , Joseph Silk

Recent theoretical studies suggest that stellar-mass binary black holes (BBHs) would merge more efficiently due to the Kozai-Lidov mechanism if these binaries form in the vicinity of supermassive black holes (SMBHs). Since SMBHs are likely…

高能天体物理现象 · 物理学 2020-01-08 Yun Fang , Xian Chen , Qing-Guo Huang

Globular clusters (GCs) may harbour intermediate-mass black holes (IMBHs) at their centres. In these dynamically active environments stellar-mass black holes (SBHs) sink to the center soon after formation, due to dynamical friction and…

星系天体物理 · 物理学 2019-07-31 Giacomo Fragione , Omer Bromberg

We consider the formation of binary black hole mergers through the evolution of field massive triple stars. In this scenario, favorable conditions for the inspiral of a black hole binary are initiated by its gravitational interaction with a…

星系天体物理 · 物理学 2017-05-31 Fabio Antonini , Silvia Toonen , Adrian S. Hamers

Galactic nuclei are expected to be one of the main sites for formations of eccentric binary black holes (EBBHs), with an estimated detection rate of $\mathcal{O}(1-100$ yr$^{-1})$ with Advanced LIGO (aLIGO) detectors operating at design…

高能天体物理现象 · 物理学 2019-07-09 János Takátsy , Bence Bécsy , Peter Raffai

The observed binary black hole (BBH) mergers indicate a large Galactic progenitor population continuously evolving from large orbital separations and low gravitational wave (GW) frequencies to the final merger phase. We investigate the…

高能天体物理现象 · 物理学 2019-04-19 Xiao Fang , Todd A. Thompson , Christopher M. Hirata

Observations have shown that the majority of massive stars, progenitors of black holes (BHs), have on average more than one stellar companion. In triple systems, wide inner binaries can be driven to a merger by the third body due to…

太阳与恒星天体物理 · 物理学 2022-10-12 Miguel A. S. Martinez , Carl L. Rodriguez , Giacomo Fragione

Black hole (BH) triples represent one of the astrophysical pathways for BH mergers in the Universe detectable by LIGO and VIRGO. We study the formation of BH triples via binary-binary encounters in dense clusters, showing that one-third of…

高能天体物理现象 · 物理学 2021-07-21 Manuel Arca-Sedda , Gongjie Li , Bence Kocsis

Many stellar-mass Black Holes (sBHs) are expected to orbit supermassive black holes at galactic centers. For galaxies with Active Galactic Nuclei (AGN), it is likely that the sBHs reside in a disk. We study the formation of sBH binaries via…

高能天体物理现象 · 物理学 2024-03-15 Barak Rom , Re'em Sari , Dong Lai

The astrophysical origin of gravitational wave (GW) transients is a timely open question in the wake of discoveries by LIGO/Virgo. In active galactic nuclei (AGNs), binaries form and evolve efficiently by interaction with a dense population…

高能天体物理现象 · 物理学 2021-01-27 Hiromichi Tagawa , Bence Kocsis , Zoltan Haiman , Imre Bartos , Kazuyuki Omukai , Johan Samsing

An enhanced rate of stellar tidal disruption events (TDEs) may be an important characteristic of supermassive black hole (SMBH) binaries at close separations. Here we study the evolution of the distribution of stars around a SMBH binary due…

星系天体物理 · 物理学 2015-05-25 Gongjie Li , Smadar Naoz , Bence Kocsis , Abraham Loeb

Galactic nuclei are often found to contain young stellar populations and, in most cases, a central supermassive black hole (SMBH). Most known massive stars are found in binaries or higher-multiplicity systems, and in a galactic nucleus the…

星系天体物理 · 物理学 2019-07-10 Giacomo Fragione , Fabio Antonini

Stellar mass black holes (BHs) are expected to segregate and form a steep density cusp around supermassive black holes (SMBHs) in galactic nuclei. We follow the evolution of a multi-mass system of BHs and stars by numerically integrating…

天体物理学 · 物理学 2009-11-13 Ryan M. O'Leary , Bence Kocsis , Abraham Loeb

With hydrodynamical simulations we examine the evolution of a highly misaligned circumbinary disc around a black hole binary including the effects of general relativity. We show that a disc mass of just a few percent of the binary mass can…

高能天体物理现象 · 物理学 2023-11-20 Rebecca G. Martin , Stephen Lepp , Bing Zhang , C. J. Nixon , Anna C. Childs

High-density cusps of compact remnants are expected to form around supermassive black holes (SMBHs) in galactic nuclei via dynamical friction and two-body relaxation. Due to the high density, binaries in orbit around the SMBH can frequently…

高能天体物理现象 · 物理学 2020-03-18 Alessandro Alberto Trani

Nuclear star clusters that surround supermassive black holes (SMBHs) in galactic nuclei are among the densest systems in the Universe, harbouring millions of stars and compact objects (COs). Within a few parsecs from the SMBH, stars can…

高能天体物理现象 · 物理学 2019-11-06 Giacomo Fragione , Idan Ginsburg , Abraham Loeb

We explore the masses, merger rates, eccentricities, and spins for field binary black holes driven to merger by a third companion through the Lidov-Kozai mechanism. Using a population synthesis approach, we model the creation of…

高能天体物理现象 · 物理学 2018-08-07 Carl L. Rodriguez , Fabio Antonini

There is a high level of interest in black hole-neutron star binaries, not only because their mergers may be detected by gravitational wave observatories in the coming years, but also because of the possibility that they could explain a…

高能天体物理现象 · 物理学 2012-06-06 William E. East , Frans Pretorius , Branson C. Stephens