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Intermediate-mass black holes (IMBHs) occupy the $ 10^2 - 10^5\,M_\odot $ range, but their existence remains poorly constrained. Only a few candidates have been suggested in dwarf galaxies, globular clusters, and LIGO-Virgo-Kagra…

Astrophysics of Galaxies · Physics 2025-10-10 Cristiano Ugolini

By means of a multimass isotropic and spherical model that includes the self-consistent treatment of a central intermediate-mass black hole (IMBH), the influence of this black hole on the morphological and physical properties of globular…

Astrophysics · Physics 2008-11-26 P. Miocchi

Whether intermediate-mass black holes reside in nearby star clusters has remained contested for decades. We address this question by training neural network and random forest regressors on synthetic catalogs generated with the {\sc Rapster}…

Astrophysics of Galaxies · Physics 2026-05-22 Konstantinos Kritos , Digvijay Wadekar , Emanuele Berti

Intermediate-mass black holes (IMBHs), with masses between roughly $10^2\,M_\odot$ and $10^5\,M_\odot$, represent a largely uncharted component of the black-hole (BH) population. They are theoretically predicted to form in several…

Astrophysics of Galaxies · Physics 2025-12-17 R. Pascale , G. Battaglia

We very briefly discuss proposed in the literature possible scenarios for intermediate mass black holes (IMBH) formation in globular clusters. We also discuss the results of the MOCCA simulations of about 2000 models (BigSurvey) regarding…

Astrophysics of Galaxies · Physics 2016-07-29 Mirek Giersz , Nathan Leigh , Arkadiusz Hypki , Abbas Askar , Nora Lützgendorf

Intermediate-mass black holes (IMBHs) with masses below ($2 \times 10^5 M_{\odot}$) are pivotal in understanding the origin and growth mechanisms of supermassive black holes (SMBHs) in galactic nuclei. This study focuses on the search and…

Astrophysics of Galaxies · Physics 2024-10-03 V. Goradzhanov , I. Chilingarian , M. Demianenko , I. Katkov , K. Grishin , V. Toptun , E. Rubtsov , D. Gasymov , I. Kuzmin

Intermediate-mass black holes (IMBHs) have not been detected beyond any reasonable doubt, despite their potential role as massive seeds for quasars and sources of tidal disruption events, ultra-luminous X-ray sources, dwarf galaxy feedback,…

Astrophysics of Galaxies · Physics 2020-07-08 Giacomo Fragione , Abraham Loeb , Kyle Kremer , Frederic A. Rasio

Globular clusters may host intermediate mass black holes (IMBHs) at their centres. Here we propose a new method for their identification using millisecond pulsars (MSPs) as probes. We show that measuring the first (jerk) and second (jounce)…

High Energy Astrophysical Phenomena · Physics 2019-05-22 Federico Abbate , Mario Spera , Monica Colpi

In this work, we address the following question: ``can we use the current cosmological simulations to identify intermediate-mass black holes (IMBHs) and quantify a putative population of wandering IMBHs?''. We compare wandering-IMBH counts…

Astrophysics of Galaxies · Physics 2025-04-30 Floor van Donkelaar , Lucio Mayer , Pedro R. Capelo , Tomas Tamfal

There is growing evidence that intermediate-mass black holes (IMBHs), defined here as having a mass in the range M=500-10^5 Msun, are present in the dense centers of certain globular clusters (GCs). Gravitational waves (GWs) from their…

High Energy Astrophysical Phenomena · Physics 2018-06-20 Ely D. Kovetz , Ilias Cholis , Marc Kamionkowski , Joseph Silk

A galaxy-sized halo may contain a large number of intermediate mass (10^{2-4} solar mass) compact objects (IMCOs), which can be intermediate mass black holes (IMBHs) or the CDM subhalos. We propose to directly detect the IMBHs by observing…

Astrophysics · Physics 2015-06-24 Kaiki Taro Inoue , Masashi Chiba

Empirical evidence for both stellar mass black holes M_bh<10^2 M_sun) and supermassive black holes (SMBHs, M_bh>10^5 M_sun) is well established. Moreover, every galaxy with a bulge appears to host a SMBH, whose mass is correlated with the…

Astrophysics of Galaxies · Physics 2014-11-20 Margarita Safonova , Prajval Shastri

Here we investigate the possibility that some globular clusters (GCs) harbor intermediate mass black holes (BH) in their centers and are also embedded in a low-mass dark matter (DM) halo. Up to date, there is no evidence on whether or not…

High Energy Astrophysical Phenomena · Physics 2020-08-19 Elaine C. F. S. Fortes , Oswaldo D. Miranda , Floyd W. Stecker , Carlos A. Wuensche

The processes that govern the formation of intermediate-mass black holes (IMBHs) in dense stellar clusters are still unclear. Here, we discuss the role of stellar mergers, star-BH interactions and accretion, as well as BH binary (BBH)…

An intermediate mass black hole (IMBH) may have a dark matter (DM) mini-halo around it and develop a spiky structure within less than a parsec from the IMBH. When a stellar mass object is captured by the mini-halo, it eventually infalls…

General Relativity and Quantum Cosmology · Physics 2013-06-03 Kazunari Eda , Yousuke Itoh , Sachiko Kuroyanagi , Joseph Silk

We estimated the sensitivity of the upcoming advanced, ground-based gravitational-wave observatories (the upgraded LIGO and Virgo and the KAGRA interferometers) to coalescing intermediate mass black hole binaries (IMBHB). We added waveforms…

General Relativity and Quantum Cosmology · Physics 2014-09-17 G. Mazzolo , F. Salemi , M. Drago , V. Necula , C. Pankow , G. A. Prodi , V. Re , V. Tiwari , G. Vedovato , I. Yakushin , S. Klimenko

Intermediate-mass black holes (IMBHs) are the missing link in the cosmic hierarchy of black holes, bridging the gap between stellar-mass black holes and supermassive ones. They also serve as unique laboratories for testing strong-field…

High Energy Astrophysical Phenomena · Physics 2026-05-20 Huan Zhou , Zhengxiang Li , Cheng-Gang Shao , Xi-Jing Wang , Kai Liao , He Gao , Zong-Hong Zhu

Black holes (BHs) with masses between 100 to 100,000 times the mass of the Sun ($\rm{M}_{\odot}$) are classified as intermediate-mass black holes (IMBHs), potentially representing a crucial link between stellar-mass and supermassive BHs.…

Astrophysics of Galaxies · Physics 2024-02-29 Abbas Askar , Vivienne F. Baldassare , Mar Mezcua

The direct measurement of gravitational waves is a powerful tool for surveying the population of black holes across the universe. The first gravitational wave catalog from LIGO has detected black holes as heavy as $\sim50~M_\odot$,…

General Relativity and Quantum Cosmology · Physics 2020-06-09 Karan Jani , Deirdre Shoemaker , Curt Cutler

Black hole (BH) thermodynamics is one of the most fascinating aspects of BH physics. While its direct proof is challenging to observe for astrophysical BHs, gravitational waves (GWs) have recently offered a new indirect powerful method to…

High Energy Astrophysical Phenomena · Physics 2022-04-04 Giacomo Fragione