Results 51 to 60 of about 136,512 (260)
The Role of Primordial Kicks on Black Hole Merger Rates [PDF]
, 2005 Primordial stars are likely to be very massive $\geq30\Msun$, form in isolation, and will likely leave black holes as remnants in the centers of their host dark matter halos in the mass range $10^{6}-10^{10}\Ms$. Such early black holes, at redshifts z$\
Abel, Tom +2 more
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Shadow of rotating and twisting charged black holes with cloud of strings and quintessence
European Physical Journal C: Particles and Fields, 2023 Testing gravity theories is an important and interesting issue in relativistic astrophysics using astrophysical observations. In recent years, Event horizon telescope collaboration provided valuable data from shadow of supermassive black holes located at
Muhammad Zahid +4 more
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Formation of Supermassive Black Hole Seeds [PDF]
Publications 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
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The first supermassive black holes [PDF]
Astronomy & Geophysics, 2017 We briefly review the historical development of the ideas regarding the first supermassive black hole seeds, the physics of their formation and radiative feedback, recent theoretical and observational progress, and our outlook for the future.
Abraham Loeb, Volker Bromm, Aaron Smith
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Growth of Supermassive Black Holes, Galaxy Mergers and Supermassive Binary Black Holes [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractThe study of galaxy mergers and supermassive binary black holes (SMBBHs) is central to our understanding of the galaxy and black hole assembly and (co-)evolution at the epoch of structure formation and throughout cosmic history. Galaxy mergers are the sites of major accretion episodes, they power quasars, grow supermassive black holes (SMBHs ...
J. G. Baker, F. K. Liu, S. Komossa
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Origin and growth of primordial black holes
Physics Letters B, 2021 Building on the insight that primordial black holes can arise from the formation and subsequent gravitational collapse of bound states of stable supermassive elementary particles during the early radiation era, we offer a comprehensive picture describing
Krzysztof A. Meissner, Hermann Nicolai
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The spin of supermassive black holes [PDF]
Classical and Quantum Gravity, 2013 Invited article accepted for publication in the focus issue on astrophysical black holes in Classical and Quantum Gravity, guest editors: D. Merritt and L. Rezzolla.
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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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Supermassive Black Holes [PDF]
Journal of High Energy Physics, Gravitation and Cosmology, 2019 In the following black hole model, electrons and positrons form a neutral gas which is confined by gravitation. The smaller masses are supported against gravity by electron degeneracy pressure. Larger masses are supported by ideal gas and radiation pressure. In each case, the gas is a polytrope which satisfies the Lane-Emden equation.
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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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