Results 111 to 120 of about 163,876 (250)

Formation of Merging Stellar-mass Black Hole Binaries by Gravitational-wave Emission in Active Galactic Nucleus Disks

The Astrophysical Journal
Many stellar-mass black holes (sBHs) are expected to orbit supermassive black holes at galactic centers. For galaxies with active galactic nuclei, it is likely that the sBHs reside in a disk.
Barak Rom, Re’em Sari, Dong Lai
doaj   +1 more source

Black Holes and Baryon Number Violation: Unveiling the Origins of Early Galaxies and the Low-Mass Gap

Galaxies
We propose that modifications to the Higgs potential within a narrow atmospheric layer near the event horizon of an astrophysical black hole could significantly enhance the rate of sphaleron transitions, as well as transform the Chern–Simons number into ...
Merab Gogberashvili, Alexander S. Sakharov   +1 more
doaj   +1 more source

A population of luminous accreting black holes with hidden mergers

, 2018
Major galaxy mergers are thought to play an important part in fuelling the growth of supermassive black holes. However, observational support for this hypothesis is mixed, with some studies showing a correlation between merging galaxies and luminous ...
A DasGupta, A Sesana, AD Goulding, AK Weigel, Anna Weigel, B Groves, Benny Trakhtenbrot, C Leitherer, C Ricci, C Ricci, C Villforth, C-L Hung, Chao-Ling Hung, Claudio Ricci, D Kocevski, D Narayanan, D Patton, David B. Sanders, E Bertin, E Glikman, E Massaro, Ezequiel Treister, G Kauffmann, G Vaucouleurs de, GF Snyder, H Fu, J Brinchmann, J Kormendy, Jessica R. Lu, JL Donley, JPW Verbiest, Kevin Schawinski, KN Abazajian, L Blecha, L Mayer, Laura Blecha, Lia F. Sartori, LK Hunt, M Barden, M Koss, M Koss, M Koss, Michael J. Koss, MP Véron-Cetty, MR Blanton, MR Blanton, NA Grogin, P Jonsson, P Jonsson, PF Hopkins, PF Hopkins, Phillip Bernhard, PR Capelo, R Chary, R Narayan, RI Davies, Richard Mushotzky, RN Lang, RS Barrows, S Haan, S Wassenhove Van, Sylvain Veilleux, T Matteo Di, U Vivian, V Springel, V Springel, WH Baumgartner, Y Ohyama, Y Tang, Y-Y Chang   +69 more
core   +1 more source

Signatures of primordial black holes as seeds of supermassive black holes [PDF]

, 2017
It is broadly accepted that Supermassive Black Holes (SMBHs) are located in the centers of most massive galaxies, although there is still no convincing scenario for the origin of their massive seeds.
J. Bernal, A. Raccanelli, L. Verde, J. Silk   +3 more
semanticscholar   +1 more source

Two Radio Cores in GPS J1543-0757: A New Dual Supermassive Black Hole System?

The Astrophysical Journal
We report on the discovery of a dual supermassive black hole system in the radio galaxy J1543−0757, with a projected separation between the two black holes of ∼46 mas. The result is based on recent multifrequency observations using the Very Long Baseline
Xiaopeng Cheng, Bong Won Sohn
doaj   +1 more source

Is there life inside black holes?

, 2011
Bound inside rotating or charged black holes, there are stable periodic planetary orbits, which neither come out nor terminate at the central singularity. Stable periodic orbits inside black holes exist even for photons. These bound orbits may be defined
Balek V, Bičák J, Carter B, Chandrasekhar S, Dotti G, Frolov V P, Grunau S Kagramanova V, Kardashev N S, Landau L D, Misner C W, Novikov I D, Olivares M Saavedra J Leiva C Villanueva J R, Pugliese D Quevedo H Ruffini R, V I Dokuchaev, Wald R M, Zeldovich Ya B   +15 more
core   +1 more source

Life inside black holes

, 2012
We consider test planet and photon orbits of the third kind inside a black hole, which are stable, periodic and neither come out of the black hole nor terminate at the singularity.
B. Carter, D. C. Wilkins, E. Hackmann, J. Bičák, J. M. Bardeen, V. Balek, V. I. Dokuchaev   +6 more
core   +1 more source

Soft gamma rays from low accreting supermassive black holes and connection to energetic neutrinos. [PDF]

Nat Commun, 2021
Kimura SS, Murase K, Mészáros P.
europepmc   +1 more source

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

A supermassive binary black hole with triple disks

, 2008
Hierarchical structure formation inevitably leads to the formation of supermassive binary black holes (BBHs) with a sub-parsec separation in galactic nuclei. However, to date there has been no unambiguous detection of such systems. In an effort to search
Bate M. R., Hayasaki K., Hayasaki K., Kimitake Hayasaki, Luis C. Ho, Roos N., Shakura N. I., Shin Mineshige   +7 more
core   +1 more source