Results 101 to 110 of about 38,906 (246)

High-energy signatures of binary supermassive black holes

EPJ Web of Conferences, 2013
Some active galactic nuclei are supposed to harbor binary systems of supermassive black holes. They are an attractive target for gravitational wave experiments.
Vila Gabriela S., Pérez Daniela, Romero Gustavo E.   +2 more
doaj   +1 more source

Phenomenological Analogies in Black Hole Systems of all Masses

, 2004
I review the progress made on the physics of relativistic jets from black hole systems in the context of the analogy between AGN and microquasars that was proposed one decade ago.
Mirabel, I. F.
core   +2 more sources

Dark matter annihilation via Breit-Wigner enhancement with heavier mediator

Physics Letters B
We propose a new scenario that both the dark matter freeze-out in the early Universe and its possible annihilation for indirect detection around a supermassive black hole are enhanced by a Breit-Wigner resonance.
Yu Cheng, Shao-Feng Ge, Jie Sheng, Tsutomu T. Yanagida   +3 more
doaj   +1 more source

Null Geodesics and Strong Field Gravitational Lensing of Black Hole with Global Monopole

Advances in High Energy Physics, 2015
We study two interesting features of a black hole with an ordinary as well as phantom global monopole. Firstly, we investigate null geodesics which imply unstable orbital motion of particles for both cases.
M. Sharif, Sehrish Iftikhar
doaj   +1 more source

A Relationship between Supermassive Black Hole Mass and the Total Gravitational Mass of the Host Galaxy

, 2009
We investigate the correlation between the mass of a central supermassive black hole and the total gravitational mass of the host galaxy (M_tot). The results are based on 43 galaxy-scale strong gravitational lenses from the Sloan Lens ACS (SLACS) Survey ...
Adams, Adams, Bolton, Bolton, Bolton, Courteau, David Crampton, Di Matteo, Dye, Eisenstein, El-Zant, Ferrarese, Ferrarese, Ferrarese, Fisher, Gavazzi, Gavazzi, Gebhardt, Graham, Graham, Graham, Gültekin, Hopkins, Hopkins, Jerjen, Jørgensen, Kaushala Bandara, Koekemoer, Koopmans, Kormendy, Krist, Luc Simard, Marconi, Moustakas, Pizzella, Press, Robertson, Silk, Simard, Springel, Strauss, Sérsic, Tremaine, Treu, Treu, Volonteri, Weiner, Wyithe, Wyithe   +48 more
core   +1 more source

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

Star Formation Around Super-Massive Black Holes

, 2008
The presence of young massive stars orbiting on eccentric rings within a few tenths of a parsec of the supermassive black hole in the Galactic centre is challenging for theories of star formation.
I. A. Bonnell, Monaghan, W. K. M. Rice
core   +1 more source

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, Begelman, Boroson, Britzen, Colpi, Comerford, De Lucia, De Propris, Decarli, Detweiler, Dunlop, Enoki, Ferrarese, Fomalont, Frank, Giovannini, Gualandris, Haring, Jaffe, Jenet, Komossa, Komossa, Kovalev, Lacey, Lister, Lovell, Mason, Mauch, McLure, Merritt, Merritt, Myers, Owsianik, Padovani, Peterson, Petrov, Petrov, Petrov, Pollack, Rajagopal, Rodriguez, S. Burke-Spolaor, Saripalli, Sault, Sesana, Sesana, Slee, Springel, Sudou, Valtonen, Volonteri, Walker, Wang, Wen, Wilkinson, Wyithe, Yu   +56 more
core   +1 more source

MEASURING SUPERMASSIVE BLACK HOLE SPINS IN AGN

Acta Polytechnica, 2013
Measuring the spins of supermassive black holes (SMBHs) in active galactic nuclei (AGN) can inform us about the relative role of gas accretion vs. mergers in recent epochs of the life of the host galaxy and its AGN.
Laura Brenneman
doaj   +1 more source

Investigating the nature of mass distribution surrounding the Galactic supermassive black hole. [PDF]

Sci Rep, 2022
Chan MH, Lee CM, Yu CW.
europepmc   +1 more source