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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

This study investigates the detectability of intermediate-mass black holes (IMBHs) within the mass range $10^2-10^5$ solar masses in the globular star clusters of NGC 1399 at a frequency of 300.00 MHz. Employing the theoretical Bondi…

Astrophysics of Galaxies · Physics 2024-09-10 B. Karimi , P. Barmby , S. Abbassi

The formation of supermassive black holes at high redshift still remains a puzzle to astronomers. Their growth becomes reasonable only when starting from a massive seed black hole with mass of the order of 10^2 - 10^5 M_SUN.…

Intermediate mass black holes (IMBHs), with masses between 100 to 10^5 M_\odot, represent the link between stellar mass black holes and the supermassive black holes that reside in galaxy centers. While IMBHs are crucial to our understanding…

Astrophysics of Galaxies · Physics 2018-07-25 Jenna M. Cann , Shobita Satyapal , Nicholas P. Abel , Claudio Ricci , Nathan J. Secrest , Laura Blecha , Mario Gliozzi

A galaxy halo may contain a large number of intermediate mass black holes (IMBHs) with masses in the range of 10^{2-6} solar mass. We propose to directly detect these IMBHs by observing multiply imaged QSO-galaxy or galaxy-galaxy strong…

Cosmology and Nongalactic Astrophysics · Physics 2014-09-08 Kaiki Taro Inoue , Valery Rashkov , Joseph Silk , Piero Madau

Intermediate mass black holes (IMBHs) with expected masses M_BH ~ 10^4 M_sun are thought to bridge the gap between stellar mass black holes (M_BH ~ 3 - 100 M_sun) and supermassive black holes found at the centre of galaxies (M_BH > 10^6…

Astrophysics of Galaxies · Physics 2015-06-04 F. Kirsten , W. H. T. Vlemmings

We have followed the evolution of multi-mass star clusters containing massive central black holes by N-body simulations on the GRAPE6 computers of Tokyo University. We find a strong cluster expansion and significant structural changes of…

Intermediate mass black holes (IMBHs) have masses between the $10^2\!-\!10^6$ M$_\odot$ and are key to our understanding of the formation of massive black holes. The known population of IMBH remains small, with a few hundred candidates and…

Astrophysics of Galaxies · Physics 2020-02-12 Jorge Martínez-Palomera , Paulina Lira , India Bhalla-Ladd , Francisco Förster , Richard M. Plotkin

The detection of intermediate mass black holes (IMBHs) in globular clusters has been hotly debated, with different observational methods delivering different outcomes for the same object. In order to understand these discrepancies, we…

Astrophysics of Galaxies · Physics 2017-08-23 Paolo Bianchini , Mark Norris , Glenn van de Ven , Eva Schinnerer

Intermediate-mass black holes (IMBHs), with masses in the range $100-10^{6}$ M$_{\odot}$, are the link between stellar-mass BHs and supermassive BHs (SMBHs). They are thought to be the seeds from which SMBHs grow, which would explain the…

Astrophysics of Galaxies · Physics 2017-05-30 Mar Mezcua

We have used the Very Large Array (VLA) to search for radio emission from the globular cluster G1 (Mayall-II) in M31. G1 has been reported by Gebhardt et al. to contain an intermediate-mass black hole (IMBH) with a mass of ~2 x 10^4 solar…

Astrophysics · Physics 2009-11-13 James S. Ulvestad , Jenny E. Greene , Luis C. Ho

There is both theoretical expectation and some observational clues that intermediate mass black holes reside in nuclei of globular clusters. In order to find an independent indicator for their existence, we investigate in this paper how an…

Astrophysics of Galaxies · Physics 2019-01-18 L. Subr , G. Fragione , J. Dabringhausen

The dynamical formation of black hole binaries in globular clusters that merge due to gravitational waves occurs more frequently in higher stellar density. Meanwhile, the probability to form intermediate mass black holes (IMBHs) also…

High Energy Astrophysical Phenomena · Physics 2020-09-09 Jongsuk Hong , Abbas Askar , Mirek Giersz , Arkadiusz Hypki , Suk-Jin Yoon

Black holes are usually observed to be of stellar-mass or supermassive. By natural extension, there should be a population of Intermediate-Mass Black Holes (IMBHs: with mass between $100$ to $10^6 M_{\odot}$) in the Universe; which has…

Astrophysics of Galaxies · Physics 2020-06-24 Paramita Barai , Elisabete M. de Gouveia Dal Pino

Intermediate-mass black holes (IMBHs) could form via runaway merging of massive stars in a young massive star cluster (YMC). We combine a suite of numerical simulations of YMC formation with a semi-analytic model for dynamical friction and…

Astrophysics of Galaxies · Physics 2021-05-27 Yanlong Shi , Michael Y. Grudić , Philip F. Hopkins

We discuss the potential of the gravitational microlensing method as a unique tool to detect unambiguous signals caused by intermediate-mass black holes in globular clusters. We select clusters near the line of sight to the Galactic Bulge…

Astrophysics of Galaxies · Physics 2016-06-15 N. Kains , D. M. Bramich , K. C. Sahu , A. Calamida

Intermediate-mass black holes (IMBHs) of mass $M_{\bullet} \approx 10^{2} - 10^{5}$ solar masses, $M_{\odot}$, are the long-sought missing link between stellar black holes, born of supernovae, and massive black holes, tied to galaxy…

Astrophysics of Galaxies · Physics 2017-09-21 Tal Alexander , Ben Bar-Or

Current theoretical models predict a mass gap with a dearth of stellar black holes (BHs) between roughly $50\,M_\odot$ and $100\,M_\odot$, while, above the range accessible through massive star evolution, intermediate-mass BHs (IMBHs) still…

Astrophysics of Galaxies · Physics 2022-03-30 Giacomo Fragione , Bence Kocsis , Frederic A. Rasio , Joseph Silk

Intermediate mass black holes (IMBHs) with a mass between $10^{2}$ and $10^{5}$ times that of the sun, which bridges the {mass gap between the} stellar-mass black holes and the supermassive black holes, are crucial in understanding the…

High Energy Astrophysical Phenomena · Physics 2017-05-05 Yun-Feng Liang , Yuan-Zhu Wang , Hao Wang , Xiang Li , Yi-Ming Hu , Zhi-Ping Jin , Yi-Zhong Fan , En-Wei Liang , Da-Ming Wei

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