Results 41 to 50 of about 32,039 (196)
Leptonic and Hadronic Radiative Processes in Supermassive-Black-Hole Jets
Galaxies, 2020 Supermassive black holes lying in the center of galaxies can launch relativistic jets of plasma along their polar axis. The physics of black-hole jets is a very active research topic in astrophysics, owing to the fact that many questions remain open on ...
Matteo Cerruti
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Hierarchical build-up of galactic bulges and the merging rate of supermassive binary black holes
, 2003 The hierarchical build-up of galactic bulges should lead to the build-up of present-day supermassive black holes by a mixture of gas accretion and merging of supermassive black holes.
Begelman M +11 more
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Gravitational lensing by a Horndeski black hole
European Physical Journal C: Particles and Fields, 2017 In this article we study gravitational lensing by non-rotating and asymptotically flat black holes in Horndeski theory. By adopting the strong deflection limit, we calculate the deflection angle, from which we obtain the positions and the magnifications ...
Javier Badía, Ernesto F. Eiroa
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A Unified Model for the Evolution of Galaxies and Quasars [PDF]
, 1999 We incorporate a simple scheme for the growth of supermassive black holes into semi-analytic models that follow the formation and evolution of galaxies in a cold dark matter dominated Universe.
G. Kauffmann, M. Haehnelt, Rees
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Primordial seeds of supermassive black holes
, 2012 Supermassive black holes exist in the centers of galaxies, including Milky Way, but there is no compelling theory of their formation. Furthermore, observations of quasars imply that supermassive black holes have already existed at some very high ...
Kawasaki, Masahiro +2 more
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The Astrophysical Journal Letters, 2023 The recent Chandra-JWST discovery of a quasar in the z ≈ 10.1 galaxy UHZ1 reveals that accreting supermassive black holes were already in place 470 million years after the Big Bang. The Chandra X-ray source detected in UHZ1 is a Compton-thick quasar with
Priyamvada Natarajan +5 more
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Supermassive black holes and their environments [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 We make use of the first high--resolution hydrodynamic simulations of structure formation which self-consistently follows the build up of supermassive black holes introduced in Di Matteo et al. (2007) to investigate the relation between black holes (BH), host halo and large--scale environment.
Colberg, Joerg M., Di Matteo, Tiziana
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Primordial black holes as dark matter candidates
SciPost Physics Lecture Notes, 2022 We review the formation and evaporation of primordial black holes (PBHs) and their possible contribution to dark matter. Various constraints suggest they could only provide most of it in the mass windows $10^{17}$ - $10^{23}\,$g or $10$ - $10^{2}\,M_ ...
Bernard Carr, Florian Kuhnel
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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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A Radio Census of Binary Supermassive Black Holes
, 2010 Using archival VLBI data for 3114 radio-luminous active galactic nuclei, we searched for binary supermassive black holes using a radio spectral index mapping technique which targets spatially resolved, double radio-emitting nuclei.
Beasley +56 more
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