Results 41 to 50 of about 8,827 (222)

Key Science Goals for the Next-Generation Event Horizon Telescope

open access: yesGalaxies, 2023
The Event Horizon Telescope (EHT) has led to the first images of a supermassive black hole, revealing the central compact objects in the elliptical galaxy M87 and the Milky Way.
Michael D. Johnson   +44 more
doaj   +1 more source

A NEARLY NAKED SUPERMASSIVE BLACK HOLE [PDF]

open access: yesThe Astrophysical Journal, 2017
ABSTRACT During a systematic search for supermassive black holes (SMBHs) not in galactic nuclei, we identified the compact, symmetric radio source B3 1715+425 with an emission-line galaxy offset ≈ 8.5
J. J. Condon   +3 more
openaire   +4 more sources

The Black Hole Mass Function: From Stellar to Supermassive [PDF]

open access: yes, 2023
The overall purpose of this thesis is to establish the black hole (BH) mass function, from stellar to supermassive. We divide this work into two: 1) the stellar black hole mass function covering the mass range $m_{\bullet} \sim 5 - 150 \ M_{\odot}$; 2 ...
SICILIA, ALEXANDER MARC
core  

Strong deflection lensing by a Lee–Wick black hole

open access: yesPhysics Letters B, 2017
We study strong deflection gravitational lensing by a Lee–Wick black hole, which is a non-singular black hole generated by a high derivative modification of Einstein–Hilbert action.
Shan-Shan Zhao, Yi Xie
doaj   +1 more source

Supermassive black holes in the early universe [PDF]

open access: yesContemporary Physics, 2019
22 pages, 9 figures, Invited Review, Contemporary Physics, in ...
Aaron Smith, Volker Bromm
openaire   +2 more sources

Tidal disruption flares from stars on eccentric orbits

open access: yesEPJ Web of Conferences, 2012
We study tidal disruption and subsequent mass fallback for stars approaching supermassive black holes on bound orbits, by performing three dimensional Smoothed Particle Hydrodynamics simulations with a pseudo-Newtonian potential.
Loeb A., Stone N., Hayasaki K.
doaj   +1 more source

Black Hole Images as Tests of General Relativity: Effects of Spacetime Geometry

open access: yesThe Astrophysical Journal, 2023
The images of supermassive black holes surrounded by optically thin, radiatively inefficient accretion flows, like those observed with the Event Horizon Telescope, are characterized by a bright ring of emission surrounding the black hole shadow.
Ziri Younsi   +2 more
doaj   +1 more source

Formation of Supermassive Black Hole Seeds [PDF]

open access: yesPublications of the Astronomical Society of Australia, 2016
AbstractThe detection of quasars at z > 6 unveils the presence of supermassive black holes of a few billion solar masses. The rapid formation process of these extreme objects remains a fascinating and open issue. Such discovery implies that seed black holes must have formed early on, and grown via either rapid accretion or BH/galaxy mergers. In this
Latif, M., FERRARA, ANDREA
openaire   +2 more sources

Supermassive black holes in galactic bulges [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society: Letters, 2008
Abstract Growing evidence indicate supermassive black holes (SMBHs) in a mass range of MBH∼ 106–1010 M⊙ lurking in central stellar bulges of galaxies. Extensive observations reveal fairly tight power laws of MBH versus the mean stellar velocity dispersion σ of the host stellar bulge.
Lou, Yu-Qing, Jiang, Yan-Fei
openaire   +2 more sources

Supermassive Black Holes [PDF]

open access: yesJournal of High Energy Physics, Gravitation and Cosmology, 2019
The Event Horizon Telescope (EHT) is aiming to image the event horizon of the supermassive black hole at the centre of our galaxy. Andrea Ghez has mapped out the orbits of stars around this supermassive black hole and deduced it has a mass of four million Suns. An even bigger supermassive black hole of six billion solar masses lies at the centre of the
openaire   +2 more sources

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