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We demonstrate that the perturbations of strongly lensed images by low-mass dark matter subhalos are significantly impacted by the concentration of the perturbing subhalo. For subhalo concentrations expected in $\Lambda$CDM, significant…

Cosmology and Nongalactic Astrophysics · Physics 2021-08-11 Quinn E. Minor , Manoj Kaplinghat , Tony H. Chan , Emily Simon

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

Intermediate-mass black holes (IMBHs), with masses of hundreds to thousands of solar masses, will be unique sources of gravitational waves for LISA. Here we discuss their context as well as specific characteristics of IMBH-IMBH and…

Astrophysics · Physics 2010-04-21 M. Coleman Miller

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

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) 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

The high velocity gradient observed in the compact cloud CO-0.40-0.22, at a projected distance of 60 pc from the centre of the Milky Way, has led its discoverers to identify the closeby mm continuum emitter, CO-0.40-0.22*, with an…

Astrophysics of Galaxies · Physics 2018-09-12 Alessandro Ballone , Michela Mapelli , Mario Pasquato

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

The different methods of determination of black holes (BHs) masses are presented for three classes of BHs observed in the Universe: stellar mass BHs, intermediate mass BHs (IMBHs) and supermassive BHs (SBHs). The results of these…

Astrophysics · Physics 2008-08-05 Janusz Ziolkowski

The existence of a population of wandering Intermediate Mass Black Holes (IMBHs) is a generic prediction of scenarios that seek to explain the formation of Supermassive Black Holes in terms of growth from massive seeds. The growth of IMBHs…

Astrophysics · Physics 2008-11-26 Mattia Fornasa , Marco Taoso , Gianfranco Bertone

Intermediate-mass black holes (IMBH) are expected to exist in globular clusters (GCs) and compact stellar systems (CSS) in general, but none have been conclusively detected. Tidal disruption events (TDEs), where a star is tidally disrupted…

Astrophysics of Galaxies · Physics 2025-06-04 Richard T. Pomeroy , Mark A. Norris

Intermediate mass ratio inspirals (IMRIs) of binary black holes with mass ratios $10^{-4}\lesssim q \lesssim 0.1$ are astrophysically interesting sources of gravitational waves. Mergers of intermediate-mass black holes (IMBHs) with…

Forbes et al. recently used the Hubble Space Telescope to localize hundreds of candidate star clusters in NGC 1023, an early-type galaxy at a distance of 11.1 Mpc. Old stars dominate the light of 92% of the clusters and intermediate-age…

Astrophysics of Galaxies · Physics 2015-09-30 J. M. Wrobel , K. E. Nyland , J. C. A. Miller-Jones

Intermediate-mass black holes (IMBHs) are those between 100 and 10$^5$ solar masses ($M_{\odot}$); their formation process is debated. One possible origin is the growth of less massive black holes (BHs) via mergers with stars and compact…

Astrophysics of Galaxies · Physics 2024-06-12 Michiko S. Fujii , Long Wang , Ataru Tanikawa , Yutaka Hirai , Takayuki R. Saitoh

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

Intermediate Mass Black Holes (IMBHs) with a mass range between $100 \, \text{M}_\odot$ and $10^6 \, \text{M}_\odot$ are expected to be surrounded by high dark matter densities, so-called dark matter spikes. The high density of…

High Energy Astrophysical Phenomena · Physics 2024-09-10 J. Aschersleben , G. Bertone , D. Horns , E. Moulin , R. F. Peletier , M. Vecchi

In a number of the most luminous ULXs (L ~ 1 E+40 erg/s) in nearby galaxies, observations with XMM-Newton and Chandra are revealing evidence which suggests that these ULXs may harbor intermediate-mass black holes (IMBHs). The detection of…

Astrophysics · Physics 2009-11-10 J. M. Miller

Chandra and XMM-Newton observations of the Cartwheel galaxy show ~17 bright X-ray sources (>~5x10^38 erg s^-1), all within the gas-rich outer ring. We explore the hypothesis that these X-ray sources are powered by intermediate-mass black…

Astrophysics · Physics 2009-11-13 M. Mapelli , B. Moore , L. Giordano , L. Mayer , M. Colpi , E. Ripamonti , S. Callegari

The population of intermediate-mass black holes (IMBHs) in nearby dwarf galaxies plays an important "ground truth" role in exploring black hole formation and growth in the early Universe. In the dwarf elliptical galaxy SDSS…

High Energy Astrophysical Phenomena · Physics 2020-07-07 Jun Yang , Leonid I. Gurvits , Zsolt Paragi , Sandor Frey , John E. Conway , Xiang Liu , Lang Cui

The paper presents a catalog of supermassive black holes (SMBH) shapened for the interferometric observations in millimeter and submillimeter wavelength ranges and based on the open sources. The catalog includes the name of the object,…

Astrophysics of Galaxies · Physics 2019-04-24 E. V. Mikheeva , V. N. Lukash , S. V. Repin , A. M. Malinovsky
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