Results 51 to 60 of about 163,876 (250)
Growing supermassive black holes in the late stages of galaxy mergers are heavily obscured [PDF]
, 2017 Mergers of galaxies are thought to cause significant gas inflows to the inner parsecs, which can activate rapid accretion on to supermassive black holes (SMBHs), giving rise to active galactic nuclei (AGN). During a significant fraction of this process,
C. Ricci +13 more
semanticscholar +1 more source
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
doaj +1 more source
Black Holes, Mergers, and the Entropy Budget of the Universe
, 2002 Vast amounts of entropy are produced in black hole formation, and the amount of entropy stored in supermassive black holes at the centers of galaxies is now much greater than the entropy free in the rest of the universe.
Abrahams A M (Binary Black Hole Grand Challenge Alliance Collaboration) +22 more
core +2 more sources
The Blazar PG 1553+113 as a Binary System of Supermassive Black Holes [PDF]
, 2018 The BL Lac PG 1553+113 has been continuously monitored in gamma-rays with Fermi-LAT for over 9 years. Its updated light curve now includes five iterations of a main pattern comprising a high peak and a longer trough, with a period .
M. Tavani +3 more
semanticscholar +1 more source
Early formation of supermassive black holes via dark matter self-interactions [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 The existence of supermassive black holes at high redshifts (z∼7) is difficult to accommodate in standard astrophysical scenarios. It has been shown that dark matter models with a subdominant self-interacting component are able to produce early seeds for
J. Choquette +2 more
semanticscholar +1 more source
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
doaj +1 more source
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
core +1 more source
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
core +2 more sources
The rapid growth phase of supermassive black holes [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We investigate the rapid growth phase of supermassive black holes (BHs) within the hydrodynamical cosmological \eagle simulation. This non-linear phase of BH growth occurs within $\sim$$L_{*}$ galaxies, embedded between two regulatory states of the ...
S. McAlpine +5 more
semanticscholar +1 more source
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
doaj +1 more source