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Recent numerical simulations of globular clusters (GCs) have shown that stellar-mass black holes (BHs) play a fundamental role in driving cluster evolution and shaping their present-day structure. Rapidly mass-segregating to the center of…

Solar and Stellar Astrophysics · Physics 2020-08-12 Newlin C. Weatherford , Sourav Chatterjee , Kyle Kremer , Frederic A. Rasio

Populations of stellar-mass black holes (BHs) in globular clusters (GCs) influence their dynamical evolution and have important implications on one of the main formation channels for gravitational wave sources. Inferring the size of these…

Astrophysics of Galaxies · Physics 2024-02-14 Nolan Dickson , Peter J. Smith , Vincent Hénault-Brunet , Mark Gieles , Holger Baumgardt

Sizeable number of stellar-mass black holes (BHs) in globular clusters (GCs) can strongly influence the dynamical evolution and observational properties of their host cluster. Using results from a large set of numerical simulations, we…

Astrophysics of Galaxies · Physics 2020-03-18 Abbas Askar , Mirek Giersz , Manuel Arca Sedda , Ammar Askar , Mario Pasquato , Agostino Leveque

We study the long term dynamical evolution of stellar mass black holes (BHs) at the Galactic center (GC) and put constraints on their number and central mass distribution. Models of the GC are considered that have not yet achieved a steady…

Astrophysics of Galaxies · Physics 2015-06-18 Fabio Antonini

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

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

Machine learning is a powerful technique, becoming increasingly popular in astrophysics. In this paper, we apply machine learning to more than a thousand globular cluster (GC) models simulated as part of the 'MOCCA-Survey Database I'…

Astrophysics of Galaxies · Physics 2019-03-13 Ammar Askar , Abbas Askar , Mario Pasquato , Mirek Giersz

Globular clusters should be born with significant numbers of stellar-mass black holes (BHs). It has been thought for two decades that very few of these BHs could be retained through the cluster lifetime. With masses ~10 MSun, BHs are ~20…

Astrophysics of Galaxies · Physics 2015-06-12 Meagan Morscher , Stefan Umbreit , Will M. Farr , Frederic A. Rasio

In this paper, we discuss how globular clusters (GCs) structural and observational properties can be used to infer the presence of a black hole system (BHS) inhabiting their inner regions. We propose a novel way to identify the BHS size,…

Astrophysics of Galaxies · Physics 2018-08-01 Manuel Arca Sedda , Abbas Askar , Mirek Giersz

We have performed N-body simulations of globular clusters (GCs) in order to estimate a detection rate of mergers of Binary stellar-mass Black Holes (BBHs) by means of gravitational wave (GW) observatories. For our estimate, we have only…

Astrophysics of Galaxies · Physics 2015-06-16 Ataru Tanikawa

Context. Globular clusters (GCs) are suggested to host many stellar-mass black holes (BHs) at their centers, thus resulting in ideal testbeds for BH formation and retention theories. BHs are expected to play a major role in GC structural…

Astrophysics of Galaxies · Physics 2024-09-04 A. Della Croce , F. I. Aros , E. Vesperini , E. Dalessandro , B. Lanzoni , F. R. Ferraro , B. Bhat

Supermassive Black Holes (BHs) residing in brightest cluster galaxies (BCGs) are overly massive when considering the local relationships between the BH mass and stellar bulge mass or velocity dispersion. Due to the location of these BHs…

Astrophysics of Galaxies · Physics 2019-05-01 Frederika Phipps , Akos Bogdan , Lorenzo Lovisari , Orsolya E. Kovacs , Marta Volonteri , Yohan Dubois

Stellar black hole (BH) binaries are one of the most promising gravitational wave (GW) sources for GW detection by the ground-based detectors. Nuclear star clusters (NCs) located at the centre of galaxies are known to harbour massive black…

Astrophysics of Galaxies · Physics 2015-02-13 Jongsuk Hong , Hyung Mok Lee

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

There have been increasing theoretical speculations and observational indications that certain globular clusters (GCs) could contain a sizeable population of stellar mass black holes (BHs). In this paper, we shortlist at least 29 Galactic…

Astrophysics of Galaxies · Physics 2018-05-16 Abbas Askar , Manuel Arca Sedda , Mirek Giersz

Black holes (BHs) play a major role in the structural and dynamical evolutions of Globular Clusters (GCs). Several recent works searched for BHs in Galactic GCs using scaling relations derived from numerical simulations. However, the…

Astrophysics of Galaxies · Physics 2025-10-20 Alessandro Della Croce

This paper presents an analysis of the correlation between the number of globular clusters (N_GC) in giant galaxies and the mass of the galaxies' central supermassive black hole (M_SMBH). I construct a sample of 20 elliptical, spiral, and…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Katherine L. Rhode

In this work, we investigate the black hole (BH) population of globular clusters (GCs) in Milky Way- (MW) and Andromeda- (M31) like galaxies. We combine the population synthesis code MASinGa and the MOCCA-Survey Database I to infer the…

Astrophysics of Galaxies · Physics 2023-02-01 A. Leveque , M. Giersz , A. Askar , M. Arca-Sedda , A. Olejak

In this paper, we address the question: What is the probability of stellar-mass black hole (BH) binaries co-existing in a globular cluster with an intermediate-mass black hole (IMBH)? Our results suggest that the detection of one or more BH…

Solar and Stellar Astrophysics · Physics 2015-06-22 Nathan W. C. Leigh , Nora Luetzgendorf , Aaron M. Geller , Thomas J. Maccarone , Craig O. Heinke , Alberto Sesana

A large fraction of galactic nuclei is expected to host supermassive black hole binaries (BHB), likely formed during the early phase of galaxies assembly and merging. In this paper, we use a large set of state-of-art numerical models to…

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