Results 61 to 70 of about 132,127 (279)
A FUNDAMENTAL EQUATION FOR SUPERMASSIVE BLACK HOLES [PDF]
International Journal of Modern Physics D, 2011 We developed a theoretical model that is able to give a common origin to the correlations between the mass M• of supermassive black holes and the mass, velocity dispersion, kinetic energy and momentum parameter of the corresponding host galaxies. Our model is essentially based on the transformation of the angular momentum of the interstellar material,
Feoli A., Mancini L.
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Gravitational lensing by a quantum deformed Schwarzschild black hole
European Physical Journal C: Particles and Fields, 2021 We investigate the weak and strong deflection gravitational lensing by a quantum deformed Schwarzschild black hole and find their observables. These lensing observables are evaluated and the detectability of the quantum deformation is assessed, after ...
Xu Lu, Yi Xie
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Key Science Goals for the Next-Generation Event Horizon Telescope
Galaxies, 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
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The cosmogony of supermassive black holes [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 We report calculations of the evolution, under Reynolds viscosity, of the massive gaseous accretion discs thought to form in the centres of galaxies as a result of major galactic mergers at early epochs. Starting with the formation of such a disc and the postulated existence of a low-mass 'seed' black hole, we focus on the mass accretion rate, , and ...
Wolfgang J. Duschl +2 more
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Formation of supermassive black holes [PDF]
The Astronomy and Astrophysics Review, 2010 To appear in The Astronomy and Astrophysics Review.
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European Physical Journal C: Particles and Fields, 2023 Supermassive black holes from the center of galaxy may be immersed in a dark matter halo. This dark matter halo may form a “cusp” structure around the black hole and disappear at a certain distance from the black hole.
Dong Liu +4 more
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Testing General Relativity with Stellar Orbits around the Supermassive Black Hole in Our Galactic Center. [PDF]
Physical Review Letters, 2017 We demonstrate that short-period stars orbiting around the supermassive black hole in our Galactic center can successfully be used to probe the gravitational theory in a strong regime. We use 19 years of observations of the two best measured short-period
A. Hees +16 more
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Black Hole Images as Tests of General Relativity: Effects of Spacetime Geometry
The 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
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A supermassive black hole awakes [PDF]
Science, 2017 Active Galaxies Every large galaxy hosts a supermassive black hole at its center, which grows by consuming passing gas or stars. Most are quiescent, but when the black hole is feeding, an accretion disk forms, causing the galaxy nucleus to shine brightly as a quasar. Gezari et al.
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The supermassive black hole of Fornax A★ [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 The radio galaxy Fornax A (NGC 1316) is a prominent merger remnant in the outskirts of the Fornax cluster. Its giant radio lobes suggest the presence of a powerful AGN and thus a central supermassive black hole (SMBH). We present high-resolution adaptive optics assisted integral-field data of Fornax A, taken with SINFONI at the Very Large Telescope in ...
Karl Gebhardt +5 more
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