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Intermediate-mass black holes (IMBHs) are believed to be the missing link between the supermassive black holes (BHs) found at the centers of massive galaxies and BHs formed through stellar core collapse. One of the proposed mechanisms for…

Astrophysics of Galaxies · Physics 2024-03-14 Rujuta A. Purohit , Giacomo Fragione , Frederic A. Rasio , Grayson C. Petter , Ryan C. Hickox

Establishing or ruling out, either through solid mass measurements or upper limits, the presence of intermediate-mass black holes (IMBHs) at the centers of star clusters would profoundly impact our understanding of problems ranging from the…

Astrophysics of Galaxies · Physics 2015-05-14 Julio Chanamé , Justice Bruursema , Rupali Chandar , Jay Anderson , Roeland van der Marel , Holland Ford

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

Gravitational waves emitted by merging black holes between $\sim 10^4-10^7~M_\odot$ will be detectable by the Laser Interferometer Space Antenna (LISA) with signal-to-noise ratios of several hundred out to redshift 20. Supermassive black…

Astrophysics of Galaxies · Physics 2021-10-04 Fazeel Mahmood Khan , Kelly Holley-Bockelmann

The recent detection of fast-moving stars in the core of Omega Centauri ($\omega$ Cen), the most massive globular cluster (GC) in the Milky Way, has provided strong evidence for the presence of an intermediate-mass black hole (IMBH). As…

High Energy Astrophysical Phenomena · Physics 2025-08-22 Elena González Prieto , Carl L. Rodriguez , Tomás Cabrera

Although their existence is not yet confirmed observationally, intermediate mass black holes (IMBHs) may play a key role in the dynamics of galactic nuclei. In this paper, we neglect the effect of the nuclear star cluster itself and…

Astrophysics of Galaxies · Physics 2020-04-15 Barnabás Deme , Yohai Meiron , Bence Kocsis

With the anticipated launch of space-based gravitational wave detectors, including LISA, TaiJi, TianQin, and DECIGO, expected around 2030, the detection of gravitational waves generated by intermediate-mass black hole binaries (IMBBHs)…

General Relativity and Quantum Cosmology · Physics 2023-12-14 Mengfei Sun , Jin Li

Pulsar timing arrays (PTAs) are designed to detect the predicted gravitational wave (GW) background produced by a cosmological population of supermassive black hole (SMBH) binaries. In this contribution I review the physics of such GW…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 A. Sesana

The detection of intermediate-mass black holes (IMBHs) i.e. those with mass $\sim 100$-$10^5 M_\odot$, is an emerging goal of gravitational-wave (GW) astronomy with wide implications for cosmology and tests of strong-field gravity. Current…

General Relativity and Quantum Cosmology · Physics 2021-08-31 Koustav Chandra , V. Villa-Ortega , T. Dent , C. McIsaac , Archana Pai , I. W. Harry , G. S. Cabourn Davies , K. Soni

Supermassive black hole binary systems (SMBHBs) emitting gravitational waves may be traced by periodic light curves. We assembled a catalog of 149 such periodic light curves, and using their masses, distances, and periods, predicted the…

Astrophysics of Galaxies · Physics 2021-07-15 Chengcheng Xin , Chiara M. F. Mingarelli , Jeffrey S. Hazboun

Astrophysical scenarios for the formation and evolution of intermediate-mass black holes (IMBHs) in the mass range $10^2 M_\odot \lesssim M \lesssim 10^6 M_\odot$ remain uncertain, but future ground-based gravitational-wave (GW)…

General Relativity and Quantum Cosmology · Physics 2024-11-12 Luca Reali , Roberto Cotesta , Andrea Antonelli , Konstantinos Kritos , Vladimir Strokov , Emanuele Berti

Massive young clusters (YCs) are expected to host intermediate-mass black holes (IMBHs) born via runaway collapse. These IMBHs are likely in binaries and can undergo mergers with other compact objects, such as stellar mass black holes (BHs)…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-21 M. Mapelli , C. Huwyler , L. Mayer , Ph. Jetzer , A. Vecchio

Supermassive black holes (SMBHs) found in the centers of many galaxies have been recognized to play a fundamental active role in the cosmological structure formation process. In hierarchical formation scenarios, SMBHs are expected to form…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Pau Amaro-Seoane , Alberto Sesana , Loren Hoffman , Matthew Benacquista , Christoph Eichhorn , Junichiro Makino , Rainer Spurzem

Even though Pulsar Timing Arrays already have the potential to detect the gravitational wave background by finding a quadrupole correlation in the timing residuals, this goal has not yet been achieved. Motivated by some theoretical…

Astrophysics of Galaxies · Physics 2021-11-30 M. Maiorano , F. De Paolis , A. A. Nucita , A. Franco

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

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

Observational evidence has been mounting for the existence of intermediate mass black holes (IMBHs, 10^2-10^5 Msun), but observing them at all, much less constraining their masses, is very challenging. In one theorized formation channel,…

Galactic nuclei are potential hosts for intermediate-mass black holes (IMBHs), whose gravitational field can affect the motion of stars and compact objects. The absence of observable perturbations in our own Galactic Centre has resulted in…

High Energy Astrophysical Phenomena · Physics 2023-07-19 Vladimir Strokov , Giacomo Fragione , Emanuele Berti

Repeated mergers of stellar-mass black holes (BHs) in dense star clusters can produce intermediate-mass black holes (IMBHs). In particular, nuclear star clusters at the centers of galaxies have deep enough potential wells to retain most of…

High Energy Astrophysical Phenomena · Physics 2022-07-20 Giacomo Fragione , Abraham Loeb , Bence Kocsis , Frederic A. Rasio

We have developed a new method for post-Newtonian, high-precision integration of stellar systems containing a super-massive black hole (SMBH), splitting the forces on a particle between a dominant central force and perturbations. We used…

Astrophysics · Physics 2008-04-11 Ulf Löckmann , Holger Baumgardt