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We investigate the dynamics of stellar-mass black holes (BH) in star clusters focusing on the dynamical formation of BH-BH binaries, which are very important sources of gravitational waves (GW). We examine the properties of these BH-BH…

Astrophysics of Galaxies · Physics 2011-02-24 Sambaran Banerjee

Young star clusters are the most common birth-place of massive stars and are dynamically active environments. Here, we study the formation of black holes (BHs) and binary black holes (BBHs) in young star clusters, by means of 6000 N-body…

We present theoretical models for stellar black hole (BH) properties in young, massive star clusters. Using a Monte Carlo code for stellar dynamics, we model realistic star clusters with $N\simeq 5\times10^5$ stars and significant binary…

Astrophysics of Galaxies · Physics 2015-06-17 S. Goswami , P. Kiel , F. A. Rasio

We investigate properties of black hole (BH) binaries formed in globular clusters via dynamical processes, using direct N-body simulations. We pay attention to effects of BH mass function on the total mass and mass ratio distributions of BH…

High Energy Astrophysical Phenomena · Physics 2017-05-12 Dawoo Park , Chunglee Kim , Hyung Mok Lee , Yeong-Bok Bae , Chris Belczynski

Dense stellar clusters are expected to house the ideal conditions for binary black hole (BBH) formation, both through binary stellar evolution and through dynamical encounters. We use theoretical arguments as well as $N$-body simulations to…

Astrophysics of Galaxies · Physics 2023-11-21 Jordan Barber , Debatri Chattopadhyay , Fabio Antonini

Young star clusters are dynamically active stellar systems and are a common birthplace for massive stars. Low-mass star clusters ($\sim{}300-10^3$ M$_\odot$) are more numerous than massive systems and are characterized by a two-body…

Understanding binary black hole (BBH) dynamics in dense star clusters is key to interpreting the gravitational wave detections by LIGO and Virgo. Here, we perform $N$-body simulations of star clusters, focusing on BBH formation mechanisms,…

Astrophysics of Galaxies · Physics 2025-02-14 Jordan Barber , Fabio Antonini

The dynamical processes involving stellar-remnant black holes (BH) in stellar clusters has always drawn attention due to the BHs' potential in a number of astrophysical phenomena, especially the dynamical formation of binary black holes…

High Energy Astrophysical Phenomena · Physics 2017-01-18 Sambaran Banerjee

I investigate the roles of cluster dynamics and massive binary evolution in producing stellar-remnant binary black hole (BBH) mergers over the cosmic time. To that end, dynamical BBH mergers are obtained from long-term direct N-body…

High Energy Astrophysical Phenomena · Physics 2022-01-19 Sambaran Banerjee

We model the dynamical evolution of primordial black holes (BHs) in dense star clusters using a simplified treatment of stellar dynamics in which the BHs are assumed to remain concentrated in an inner core, completely decoupled from the…

Dynamical interactions in dense star clusters are considered one of the most effective formation channels of binary black holes (BBHs). Here, we present direct $N-$body simulations of two different star cluster families: low-mass…

Astrophysics of Galaxies · Physics 2022-10-12 Stefano Torniamenti , Sara Rastello , Michela Mapelli , Ugo N. Di Carlo , Alessandro Ballone , Mario Pasquato

Dense star clusters are thought to contribute significantly to the merger rates of stellar-mass binary black holes (BBHs) detected by the LIGO-Virgo-KAGRA collaboration. We combine $N$-body dynamic models of realistic dense star clusters…

High Energy Astrophysical Phenomena · Physics 2026-04-07 Claire S. Ye , Maya Fishbach , Kyle Kremer , Marta Reina-Campos

The dense environment of globular clusters (GCs) can facilitate the formation of binary black holes (BBHs), some of which can merge with gravitational waves (GW) within the age of the Universe. We have performed a survey of Monte-Carlo…

High Energy Astrophysical Phenomena · Physics 2018-08-22 Jongsuk Hong , Enrico Vesperini , Abbas Askar , Mirek Giersz , Magdalena Szkudlarek , Tomasz Bulik

Black hole (BH) binary mergers formed through dynamical interactions in dense star clusters are believed to be one of the main sources of gravitational waves for Advanced LIGO and Virgo. Here we present a fast numerical method for…

High Energy Astrophysical Phenomena · Physics 2020-04-02 Fabio Antonini , Mark Gieles

Several binary black holes (BBHs) have been observed using gravitational wave detectors. For the formation mechanism of BBHs, two main mechanisms, isolated binary evolution and dynamical formation in dense star clusters, have been…

High Energy Astrophysical Phenomena · Physics 2020-06-03 Jun Kumamoto , Michiko S. Fujii , Ataru Tanikawa

We study the dynamics of stellar-mass black holes (BH) in star clusters with particular attention to the formation of BH-BH binaries, which are interesting as sources of gravitational waves (GW). We examine the properties of these BH-BH…

Solar and Stellar Astrophysics · Physics 2015-05-14 Sambaran Banerjee , Holger Baumgardt , Pavel Kroupa

In this paper, we study the formation and dynamical evolution of black hole-black hole (BH-BH) binaries in young star clusters (YSCs), by means of N-body simulations. The simulations include metallicity-dependent recipes for stellar…

Astrophysics of Galaxies · Physics 2015-06-19 Brunetto Marco Ziosi , Michela Mapelli , Marica Branchesi , Giuseppe Tormen

Star clusters can interact and merge in galactic discs, halos, or centers. We present direct N-body simulations of binary mergers of star clusters with $M_{\star} = 2.7 \times 10^4 \: \mathrm{M_{\odot}}$ each, using the N-body code BIFROST…

Astrophysics of Galaxies · Physics 2025-03-18 Lazaros Souvaitzis , Antti Rantala , Thorsten Naab

We explore hierarchical black hole (BH) mergers in nuclear star clusters (NSCs), globular clusters (GCs) and young star clusters (YSCs), accounting for both original and dynamically assembled binary BHs (BBHs). We find that the median mass…

The growing number of black hole binary (BHB) mergers detected by the Laser Interferometer Gravitational-Wave Observatory (LIGO) have the potential to enable an unprecedented characterization of the physical processes and astrophysical…

High Energy Astrophysical Phenomena · Physics 2020-10-21 Oliver Anagnostou , Michele Trenti , Andrew Melatos
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