Results 11 to 20 of about 205,282 (201)

An Intermediate-mass Black Hole Hidden behind Thick Obscuration

The Astrophysical Journal
Recent models suggest approximately half of all accreting supermassive black holes (SMBHs; M _BH ≳ 10 ^5 M _⊙ ) are expected to undergo intense growth phases behind Compton-thick ( N _H > 1.5 × 10 ^24 cm ^−2 ) veils of obscuring gas.
Peter G. Boorman, Daniel Stern, Roberto J. Assef, Abhijeet Borkar, Murray Brightman, Johannes Buchner, Chien-Ting Chen, Hannah P. Earnshaw, Fiona A. Harrison, Gabriele A. Matzeu, Ryan W. Pfeifle, Claudio Ricci, Jiří Svoboda, Núria Torres-Albà, Ingyin Zaw   +14 more
doaj   +5 more sources

Intermediate-Mass Black Holes [PDF]

Annual Review of Astronomy and Astrophysics, 2020
We describe ongoing searches for intermediate-mass black holes with MBH≈ 10–105M⊙. We review a range of search mechanisms, both dynamical and those that rely on accretion signatures. We find the following conclusions: ▪  Dynamical and accretion signatures alike point to a high fraction of 109–1010M⊙galaxies hosting black holes with MBH∼ 105M⊙.
Greene, Jenny E., Strader, Jay, Ho, Luis C.   +2 more
openaire   +2 more sources

Fast-moving stars around an intermediate-mass black hole in ω Centauri. [PDF]

Nature
Häberle M, Neumayer N, Seth A, Bellini A, Libralato M, Baumgardt H, Whitaker M, Dumont A, Alfaro-Cuello M, Anderson J, Clontz C, Kacharov N, Kamann S, Feldmeier-Krause A, Milone A, Nitschai MS, Pechetti R, van de Ven G.   +17 more
europepmc   +2 more sources

INTERMEDIATE-MASS BLACK HOLES [PDF]

International Journal of Modern Physics D, 2004
The mathematical simplicity of black holes, combined with their links to some of the most energetic events in the universe, means that black holes are key objects for fundamental physics and astrophysics. Until recently, it was generally believed that black holes in nature appear in two broad mass ranges: stellar-mass (M~3–20 M⊙), which are produced ...
Miller, M. Coleman, Colbert, E. J. M.
openaire   +2 more sources

Intermediate-mass black holes in galactic nuclei [PDF]

Proceedings of the International Astronomical Union, 2004
We present the first homogeneous sample of intermediate-mass black hole candidates in active galactic nuclei. Starting with broad-line active nuclei from the Sloan Digital Sky Survey, we use the linewidth-luminosity-mass scaling relation to select a sample of 19 galaxies in the mass range M_BH ~ 8 x 10^4 - 10^6 solar masses.
Greene, Jenny E., Ho, Luis C., Barth, Aaron J.   +2 more
openaire   +3 more sources

Constraints on Galactic intermediate mass black holes [PDF]

Monthly Notices of the Royal Astronomical Society, 2006
Intermediate Mass Black Holes (IMBHs; 10^1.3-5 M_sun) are thought to form as relics of Population III stars or from the runaway collapse of stars in young clusters; their number and very existence are uncertain. We ran N-body simulations of Galactic IMBHs, modelling them as a halo population distributed according to a Navarro, Frenk & White (NFW ...
Mapelli, M., FERRARA, ANDREA, Rea, N.
openaire   +2 more sources

Intermediate-mass black holes in globular clusters [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2012
Abstract There have been reports of possible detections of intermediate-mass black holes (IMBHs) in globular clusters (GCs). Empirically, there exists a tight correlation between the central supermassive black hole (SMBH) mass and the mean velocity dispersion of elliptical galaxies, ‘pseudo-bulges’ and classical bulges of spiral galaxies.
Lou, Yu-Qing, Wu, Yi-Hong
openaire   +2 more sources

Hypervelocity Stars from a Supermassive Black Hole–Intermediate-mass Black Hole Binary [PDF]

The Astrophysical Journal, 2019
Abstract In this paper we consider a scenario in which the currently observed hypervelocity stars in our Galaxy have been ejected from the Galactic center as a result of dynamical interactions with an intermediate-mass black hole (IMBH) orbiting the central supermassive black hole (SMBH).
Alexander Rasskazov, Giacomo Fragione, Nathan W. C. Leigh, Hiromichi Tagawa, Alberto Sesana, Adrian Price-Whelan, Elena Maria Rossi   +6 more
openaire   +3 more sources

Features of globular cluster’s dynamics with an intermediate-mass black hole

Open Astronomy, 2018
In this paper, we address the question of how a central intermediate-mass black hole (IMBH) in a globular cluster (GC) affects dynamics, core collapse, and formation of the binary population.
Ryabova Marina V., Gorban Alena S., Shchekinov Yuri A., Vasiliev Evgenii O.   +3 more
doaj   +1 more source

Star Clusters with Primordial Binaries: III. Dynamical Interaction between Binaries and an Intermediate Mass Black Hole [PDF]

, 2006
We present the first study of the dynamical evolution of an isolated star cluster that combines a significant population of primordial binaries with the presence of a central black hole.
Ardi, E., Hut, P., Mineshige, S., Trenti, M.   +3 more
core   +2 more sources