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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…

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…

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

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

Black holes formed in dense star clusters, where dynamical interactions are frequent, may have fundamentally different properties than those formed through isolated stellar evolution. Theoretical models for single star evolution predict a…

Theoretical modeling of massive stars predicts a gap in the black hole (BH) mass function above $\sim 40-50\,M_{\odot}$ for BHs formed through single star evolution, arising from (pulsational) pair-instability supernovae. However, in dense…

The study of stellar-remnant black holes (BH) in dense stellar clusters is now in the spotlight, especially due to their intrinsic ability to form binary black holes (BBH) through dynamical encounters, that potentially coalesce via…

High Energy Astrophysical Phenomena · Physics 2017-11-08 Sambaran Banerjee

Young star clusters are likely the most common birthplace of massive stars across cosmic time and influence the formation of compact binaries in several ways. Here, we simulate the formation of black hole -- neutron star binaries (BHNSs) in…

High Energy Astrophysical Phenomena · Physics 2020-07-22 Sara Rastello , Michela Mapelli , Ugo N. Di Carlo , Nicola Giacobbo , Filippo Santoliquido , Mario Spera , Alessandro Ballone , Giuliano Iorio

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

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

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

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

Searching for distinctive signatures, which characterize different formation channels of binary black holes (BBHs), is a crucial step towards the interpretation of current and future gravitational wave detections. Here, we investigate the…

High Energy Astrophysical Phenomena · Physics 2019-06-26 Ugo N. Di Carlo , Nicola Giacobbo , Michela Mapelli , Mario Pasquato , Mario Spera , Long Wang , Francesco Haardt

These are exciting times for binary black hole (BBH) research. LIGO and Virgo detections are progressively drawing a spectacular fresco of BBH masses, spins and merger rates. In this review, we discuss the main formation channels of BBHs…

High Energy Astrophysical Phenomena · Physics 2022-02-11 Michela Mapelli

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

We present theoretical models of black hole (BH) populations in young stellar environments, such as starbursts and young star clusters. Using a population synthesis approach we compute the formation rates and characteristic properties of…

Astrophysics · Physics 2009-11-10 Krzysztof Belczynski , Aleksander Sadowski , Frederic A. Rasio

Binary black holes (BBHs) born from the evolution of Population III (Pop. III) stars are one of the main high-redshift targets for next-generation ground-based gravitational-wave (GW) detectors. Their predicted initial mass function and…

The detection of over a hundred gravitational wave signals from double compacts objects have confirmed the existence of such binaries with tight orbits. Two main formation channels are generally considered to explain the formation of these…

Astrophysics of Galaxies · Physics 2025-09-24 Tristan Bruel , Astrid Lamberts , Carl L. Rodriguez , Robert Feldmann , Michael Y. Grudic , Jorge Moreno

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 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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