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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

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

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

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

Numerical simulations have shown that black holes (BHs) can strongly influence the evolution and present-day observational properties of globular clusters (GCs). Using a Monte Carlo code, we construct GC models that match the Milky Way (MW)…

High Energy Astrophysical Phenomena · Physics 2018-03-21 Kyle Kremer , Claire S. Ye , Sourav Chatterjee , Carl L. Rodriguez , Frederic A. Rasio

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

Recently, rapid observational and theoretical progress has established that black holes (BHs) play a decisive role in the formation and evolution of individual galaxies as well as galaxy groups and clusters. In particular, there is…

Astrophysics · Physics 2008-11-20 Ewald Puchwein , Debora Sijacki , Volker Springel

The dynamical evidence for black holes (BHs) in galactic nuclei is reviewed, with emphasis on recent improvements in spatial resolution, methods for analyzing galaxy spectra and dynamical modeling. M31, M32 and M87 are discussed in some…

Astrophysics · Physics 2007-05-23 Roeland P. van der Marel

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

We explore the possibility that massive black holes comprise a significant fraction of the dark matter of our galaxy by studying the dissolution of galactic globular clusters bombarded by them. In our simulations, we evolve the clusters…

Astrophysics · Physics 2009-10-31 Phil Arras , Ira Wasserman

There is compelling evidence that black holes (BHs) in cluster centers vigorously interact with their surroundings, indicating that any realistic model of cluster formation needs to account for these processes. Here we use high-resolution…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Ewald Puchwein , Debora Sijacki , Volker Springel

Recent N-body simulations predict that large numbers of stellar black holes (BHs) could remain bound to globular clusters (GCs) at present, and merging BH--BH binaries are produced dynamically in significant numbers. We systematically vary…

Astrophysics of Galaxies · Physics 2017-01-11 Sourav Chatterjee , Carl L. Rodriguez , 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 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

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 contributed paper I review our current knowledge of the local Black Hole (BH) scaling relations, and their impact on the determination of the local BH mass function. I particularly emphasize the remaining systematic uncertainties…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 Francesco Shankar

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

The dynamical evolution of globular clusters (GCs) is tied to their binary population, as binaries segregate to the cluster centre, leading to an increased binary fraction in the core. This central overabundance of mainly hard binaries can…

The hydrodynamic formation of massive black holes (BHs) in globular clusters is considered. In particular, we examine the possibility of the BH formation induced by the radiation drag that is exerted on the interstellar matter by stellar…

Astrophysics · Physics 2009-11-11 Nozomu Kawakatu , Masayuki Umemura
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