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The formation of compact stellar-mass binaries is a difficult, but interesting problem in astrophysics. There are two main formation channels: In the field via binary star evolution, or in dense stellar systems via dynamical interactions.…

高能天体物理现象 · 物理学 2017-06-21 Xian Chen , Pau Amaro-Seoane

Most, if not all, stars in the field are born in binary configurations or higher multiplicity systems. In dense stellar environment such as the Galactic Center (GC), many stars are expected to be in binary configurations as well. These…

太阳与恒星天体物理 · 物理学 2016-05-27 Alexander P. Stephan , Smadar Naoz , Andrea M. Ghez , Gunther Witzel , Breann N. Sitarski , Tuan Do , Bence Kocsis

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

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

The emission of gravitational waves (GWs) during single-single close encounters in galactic nuclei (GNs) leads to the formation and rapid merger of highly eccentric stellar-mass black hole (BH) binaries. The distinct distribution of…

高能天体物理现象 · 物理学 2021-07-14 László Gondán , Bence Kocsis

We outline the eccentricity evolution of sub-parsec massive black hole binaries (MBHBs) forming in galaxy mergers. In both stellar and gaseous environments, MBHBs are expected to grow large orbital eccentricities before they enter the…

宇宙学与河外天体物理 · 物理学 2015-06-03 Constanze Roedig , Alberto Sesana

The current gravitational wave detectors have reached their operational sensitivity and are nearing detection of compact object binaries. In the coming years, we expect that the Advanced LIGO/VIRGO will start taking data. At the same time,…

宇宙学与河外天体物理 · 物理学 2015-05-20 I. Kowalska , T. Bulik , K. Belczynski , M. Dominik , D. Gondek-Rosinska

We derive the probability for a newly formed binary black hole (BBH) to undergo an eccentric gravitational wave (GW) merger during binary-single interactions inside a stellar cluster. By integrating over the hardening interactions such a…

高能天体物理现象 · 物理学 2018-05-30 Johan Samsing

Most stellar evolution models predict that black holes (BHs) should not exist above approximately $50-70$ M$_\odot$, the lower limit of the pair-instability mass gap. However, recent LIGO/Virgo detections indicate the existence of BHs with…

星系天体物理 · 物理学 2022-07-07 Sanaea C. Rose , Smadar Naoz , Re'em Sari , Itai Linial

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

Binary black holes (BBHs) are one of the endpoints of isolated binary evolution, and their mergers a leading channel for gravitational wave events. Here, using the evolutionary code \textsc{StarTrack}, we study the statistical properties of…

高能天体物理现象 · 物理学 2018-04-19 Rosalba Perna , Martyna Chruslinska , Alessandra Corsi , Krzysztof Belczynski

We show that nearly half of all binary black hole (BBH) mergers dynamically assembled in globular clusters have measurable eccentricities ($e>0.01$) in the LISA band ($10^{-2}$ Hz), when General Relativistic corrections are properly…

高能天体物理现象 · 物理学 2018-09-05 Johan Samsing , Daniel J. D'Orazio

Stellar-mass black hole binaries (BHBs) near supermassive black holes (SMBH) in galactic nuclei undergo eccentricity oscillations due to gravitational perturbations from the SMBH. Previous works have shown that this channel can contribute…

高能天体物理现象 · 物理学 2019-04-25 Bao-Minh Hoang , Smadar Naoz , Bence Kocsis , Will Farr , Jess McIver

The predicted rate of binary black hole mergers from galactic fields can vary over several orders of magnitude and is extremely sensitive to the assumptions of stellar evolution. But in dense stellar environments such as globular clusters,…

Stellar-mass black hole binaries (BHBs) in galactic nuclei are gravitationally perturbed by the central supermassive black hole (SMBH) of the host galaxy, potentially inducing strong eccentricity oscillations through the eccentric…

高能天体物理现象 · 物理学 2024-08-21 Alan M. Knee , Jess McIver , Smadar Naoz , Isobel M. Romero-Shaw , Bao-Minh Hoang , Evgeni Grishin

Stellar mass binary black holes of unknown formation mechanism have been observed, motivating new methods for distinguishing distinct black hole populations. This work explores how the orbital eccentricity of stellar mass binary black holes…

广义相对论与量子宇宙学 · 物理学 2024-03-04 Nicholas DePorzio , Lisa Randall , Zhong-Zhi Xianyu

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

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

The orbital eccentricity of a merging binary black hole leaves an imprint on the associated gravitational-wave signal that can reveal whether the binary formed in isolation or in a dynamical environment, such as the core of a dense star…

高能天体物理现象 · 物理学 2021-11-17 Isobel M. Romero-Shaw , Paul D. Lasky , Eric Thrane

It remains an open question whether the binary black hole mergers observed with gravitational-wave detectors originate from the evolution of isolated massive binary stars or were dynamically driven by perturbations from the environment.…

高能天体物理现象 · 物理学 2026-01-23 Jakob Stegmann , Davide Gerosa , Isobel Romero-Shaw , Giulia Fumagalli , Hiromichi Tagawa , Lorenz Zwick