Results 141 to 150 of about 163,876 (250)

High-energy signatures of binary supermassive black holes

EPJ Web of Conferences, 2013
Some active galactic nuclei are supposed to harbor binary systems of supermassive black holes. They are an attractive target for gravitational wave experiments.
Vila Gabriela S., Pérez Daniela, Romero Gustavo E.   +2 more
doaj   +1 more source

Primordial black holes in cosmological simulations: growth prospects for supermassive black holes

The Open Journal of Astrophysics
It has long been suggested that a fraction of the dark matter in the Universe could exist in the form of primordial black holes (PBHs) that have existed since the radiation dominated era.
Lewis R Prole, John A Regan, Daxal Mehta, Peter Coles, Pratika Dayal   +4 more
doaj   +1 more source

Growing Supermassive Black Holes in Cosmological Simulations of Structure Formation [PDF]

, 2009
Debora Sijacki, Volker Springel, Martin G. Haehnelt   +2 more
openalex   +1 more source

Super-Eddington Accretion in Quasars

Universe
This review provides an observational perspective on the fundamental properties of super-Eddington accretion onto supermassive black holes in quasars.
Paola Marziani, Karla Garnica Luna, Alberto Floris, Ascensión del Olmo, Alice Deconto-Machado, Tania M. Buendia-Rios, C. Alenka Negrete, Deborah Dultzin   +7 more
doaj   +1 more source

Tidal disruption of stars by supermassive black holes: The X-ray view

EPJ Web of Conferences, 2012
The tidal disruption of stars by supermassive black holes produces luminous soft X-ray accretion flares in otherwise inactive galaxies. First events have been discovered in X-rays with the ROSAT observatory, and have more recently been detected with XMM ...
Komossa S.
doaj   +1 more source

Emergence of cHz Quasiperiodic Oscillations from a Low-angular-momentum Flow onto a Supermassive Black Hole

The Astrophysical Journal Letters
Quasiperiodic oscillations (QPOs) are very common in black hole accretion systems that are seen from the modulations in luminosity. Many supermassive black hole sources (e.g., RE J1034+396, 1H 0707-495, MCG-6-30-15, 1ES 1927+654, Sgr A*) have been ...
Indu K. Dihingia, Yosuke Mizuno
doaj   +1 more source

New Estimates of the Spin and Accretion Rate of the Black Hole M87*

The Astrophysical Journal Letters
In this Letter, we use the imaging results of M87* from the Event Horizon Telescope (EHT) to calculate the rotational velocity of the inner edge of the accretion disk and find a value of ∼0.14 c .
Michael Drew, Joshua S. Stanway, Brett A. Patterson, Timothy J. Walton, Derek Ward-Thompson   +4 more
doaj   +1 more source

Star Clusters and Super Massive Black Holes: High Velocity Stars Production

, 2016
One possible origin of high velocity stars in the Galaxy is that they are the product of the interaction of binary systems and supermassive black holes.
Capuzzo-Dolcetta, Roberto, Fragione, Giacomo   +1 more
core  

Stellar Collisions in Galactic Nuclei: Impact on Destructive Events Near a Supermassive Black Hole [PDF]

, 2023
Shmuel Balberg, Gilad Yassur
openalex   +1 more source

Connecting Cores and Black Hole Dynamics across Scales: From Globular Clusters to Massive Ellipticals

The Astrophysical Journal Letters
The centers of massive elliptical galaxies exhibit a wide range in density profiles, from central cusps to resolved cores with order kiloparsec sizes.
Kyle Kremer, Newlin C. Weatherford, Philip F. Hopkins, Nicholas Z. Rui, Claire S. Ye   +4 more
doaj   +1 more source