Results 151 to 160 of about 166,156 (289)

Supermassive black holes at high redshifts [PDF]

, 2019
MeV blazars are the most luminous persistent sources in the Universe and emit most of their energy in the MeV band. These objects display very large jet powers and accretion luminosities and are known to host black holes with a mass often exceeding $10^9
Agudo, Ivan, Ajello, Marco, Baring, Matthew, Beckmann, Volker, Bozhilov, Vladimir, Buson, Sara, Castro, Daniel, Coppi, Paolo, D'Ammando, Filippo, De Angelis, Alessandro, Dominguez, Alberto, Doro, Michele, Gasparrini, Dario, Guiriec, Sylvain, Guiriec, Sylvain, Harding, J. Patrick, Hartmann, Dieter, Hays, Elizabeth, Hewitt, John W., Li, Hui, Longo, Francesco, Marcotulli, Lea, Marcowith, Alexandre, McEnery, Julie, Ojha, Roopesh, Orlando, Elena, Paliya, Vaidehi S., Perkins, Jeremy S., Petropoulou, Maria, Prandini, Elisa, The, Lih-Sin, Thompson, David, Tomsick, John, Venters, Tonia, Wadiasingh, Zorawar   +34 more
core   +1 more source

Supermassive black holes then and now [PDF]

AIP Conference Proceedings, 1998
7 pages, to appear in The Proceedings of the Second International LISA Symposium on Graviational Waves, ed.
openaire   +3 more sources

Bayesian Black Hole Photogrammetry

The Astrophysical Journal
We propose an analytic dual-cone accretion model for horizon-scale images of the cores of low-luminosity active galactic nuclei, including those observed by the Event Horizon Telescope (EHT).
Dominic O. Chang, Michael D. Johnson, Paul Tiede, Daniel C. M. Palumbo   +3 more
doaj   +1 more source

Supermassive black holes as giant Bose-Einstein condensates [PDF]

, 2008
Theo M. Nieuwenhuizen
openalex   +1 more source

Supermassive black holes from primordial black hole seeds [PDF]

Physical Review D, 2004
The observational evidence for a population of quasars powered by supermassive black holes of mass \geq 10^9 M_sun at redshifts z\geq 6 poses a great challenge for any model describing the formation of galaxies. Assuming uninterrupted accretion at the Eddington limit, seed black holes of at least 1000 M_sun are needed at z \approx 15.
openaire   +2 more sources

Observational Constraints on the Self Interacting Dark Matter Scenario and the Growth of Supermassive Black Holes

, 2001
We consider the consequences of SIDM for a velocity dependent cross section per unit mass. Accretion of SIDM onto seed black holes can produce supermassive black holes that are too large for certain combinations of parameters,which is used to obtain a ...
Dalcanton J. J., de Blok W. J. G., Lacey C., Lynden-Bell D., Padmanabhan T., Persic M., Richstone D., Zhao H. S.   +7 more
core   +1 more source

Feeding supermassive black holes by collisional cascades [PDF]

, 2018
Christian Faber, Walter Dehnen
openalex   +1 more source

A VLBI Proper Motion Analysis of the Recoiling Supermassive Black Hole Candidate Mrk 1018 [PDF]

, 2023
Gregory J. Walsh, Sarah Burke-Spolaor, T. Joseph W. Lazio   +2 more
openalex   +1 more source

Supermassive black holes with stellar companions

AIP Conference Proceedings, 1994
Low‐mass stars in close orbits around supermassive black holes in active galactic nuclei (AGN) may provide an important signature for testing the existence of supermassive black holes. Here we discuss how such systems can form by being ‘‘ground down’’ by their interaction with an AGN accretion disk and discuss the peculiarities of such binaries with ...
Podsiadlowski, P, Rees, M
openaire   +2 more sources

Revealing the origin of the first supermassive black holes

, 2022

openalex   +1 more source