Results 61 to 70 of about 34,507 (229)

A NEARLY NAKED SUPERMASSIVE BLACK HOLE [PDF]

The Astrophysical Journal, 2017
ABSTRACT During a systematic search for supermassive black holes (SMBHs) not in galactic nuclei, we identified the compact, symmetric radio source B3 1715+425 with an emission-line galaxy offset ≈ 8.5
James J. Condon, Yuri Y. Kovalev, Yuri Y. Kovalev, Leonid Petrov, Jeremy Darling   +4 more
openaire   +4 more sources

Threshold drop in accretion density if dark energy is accreting onto a supermassive black hole

European Physical Journal C: Particles and Fields, 2019
Recent studies of galactic cores tell us that supermassive black holes are hosted at each of these cores. We got some evidences even. Besides, dark energy is expected to be distributed all over in our universe.
Ritabrata Biswas, Sandip Dutta
doaj   +1 more source

Black-Hole Bombs and Photon-Mass Bounds

, 2012
Generic extensions of the standard model predict the existence of ultralight bosonic degrees of freedom. Several ongoing experiments are aimed at detecting these particles or constraining their mass range.
A. A. Starobinsky, Akihiro Ishibashi, B. J. Carr, Emanuele Berti, Leonardo Gualtieri, Paolo Pani, S. Hawking, Vitor Cardoso, Y. B. Zel’Dovich   +8 more
core   +1 more source

Gravitational lensing by a quantum deformed Schwarzschild black hole

European Physical Journal C: Particles and Fields, 2021
We investigate the weak and strong deflection gravitational lensing by a quantum deformed Schwarzschild black hole and find their observables. These lensing observables are evaluated and the detectability of the quantum deformation is assessed, after ...
Xu Lu, Yi Xie
doaj   +1 more source

Gravitational lensing by deformed Horava-Lifshitz black hole in rainbow gravity

Physics Letters B
In this study, we investigate the gravitational lensing effects of deformed Horava-Lifshitz black holes, considering both strong and weak-field limit approximations and incorporating the impact of rainbow functions.
Aniruddha Ghosh, Ujjal Debnath
doaj   +1 more source

The Formation and Evolution of the First Massive Black Holes

, 2004
The first massive astrophysical black holes likely formed at high redshifts (z>10) at the centers of low mass (~10^6 Msun) dark matter concentrations.
A Cattaneo, A Cavaliere, A Gould, A Heger, A Jenkins, A Kashlinsky, A Kogut, A Lidz, A Soltan, A Songaila, A Venkatesan, A Wandel, AA Thoul, AC Fabian, AJ Barger, AR King, AR King, AW Graham, B Ciardi, B Ciardi, BJ Carr, CF Gammie, CF Gammie, CJ Willott, CL Bennett, CS Kochanek, D Eisenstein, D Galli, D Lynden-Bell, D Lynden-Bell, D Merritt, D Proga, DC Heggie, DE Berk Van den, DM Alexander, DM Alexander, DN Spergel, DQ Lamb, DR Garnett, E Quataert, EE Salpeter, EJM Colbert, ET Vishniac, F Haardt, F Hoyle, F Palla, F Walter, FA Rasio, G Efstathiou, G Efstathiou, G Kauffmann, G Quinlan, GA Shields, GJ Wasserburg, GL Granato, GM Fuller, GP Holder, GT Richards, H Baumgardt, H Kang, H Kang, H Netzer, H Susa, H Zhao, HM Lee, I Igumenshchev, I Shlosman, J Arons, J Binney, J Comerford, J Goodman, J Magorrian, J Miralda-Escudé, J Silk, J Silk, J Stone, J Tumlinson, J-H Woo, JA Sellwood, JA Tyson, JE Gunn, JF Navarro, JM Shull, JM Stone, JP Ostriker, K Gebhardt, K Gebhardt, K Menou, K Menou, L Ciotti, L Ciotti, L Ferrarese, L Ferrarese, L Ferrarese, L Hui, LL Spitzer Jr, M Dijkstra, M Elvis, M Fukugita, M Kaplinghat, M Milosavljevic, M Saijo, M Shibata, M Tegmark, M Vestergaard, M Vestergaard, M Volonteri, M Zaldarriaga, MC Begelman, MC Begelman, MC Begelman, MC Begelman, MC Begelman, MC Begelman, MG Haehnelt, MG Haehnelt, MG Haehnelt, MG Haehnelt, MJ Kukula, MJ Rees, MJ Rees, NI Shakura, NY Gnedin, NY Gnedin, NY Gnedin, O Blaes, P Hut, P Kaaret, P Madau, P Madau, P Madau, P Madau, P Martini, P Martini, P McDonald, P Monaco, P Salucci, P Valageas, P Väisänen, PA Shaver, PJ Armitage, PR Shapiro, PR Shapiro, Q Yu, Q Yu, R Barkana, R Barkana, R Cen, R Cen, RD Blandford, RD Blandford, RF Mushotzky, RH Becker, RK Islam, RK Sheth, RL White, RP Marel Van der, RP Marel Van der, RP Marel Van der, RV Wagoner, S Croom, S Kaspi, S Lepp, S Wyithe, S Wyithe, S Wyithe, S Wyithe, SA Hughes, SDM White, SE Woosley, SF Portegies Zwart, SL Shapiro, SL Shapiro, SP Oh, SP Oh, SP Oh, SP Oh, SR Heap, T Abel, T Abel, T Abel, T Abel, T Hirasawa, T Kitayama, T Matsuda, T Matteo Di, T Miyaji, T Theuns, TA Small, V Bromm, V Bromm, V Bromm, WC Saslaw, WH Press, X Fan, X Fan, X Fan, X Fan, X Wu, YB Zel’dovich, Z Haiman, Z Haiman, Z Haiman, Z Haiman, Z Haiman, Z Haiman, Z Haiman, Z Haiman, Z Haiman, Z Haiman, Z Haiman, Z Haiman, Z Haiman, Z Haiman, Z Haiman   +214 more
core   +1 more source

Constraints on alternatives to supermassive black holes [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2006
Abstract Observations of the centres of galaxies continue to evolve, and it is useful to take a fresh look at the constraints that exist on alternatives to supermassive black holes at their centres. We discuss constraints complementary to those of Maoz and demonstrate that an extremely wide range of other possibilities can be excluded ...
M. Coleman Miller, M. Coleman Miller
openaire   +4 more sources

Supermassive black holes in galactic bulges [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2008
Abstract Growing evidence indicate supermassive black holes (SMBHs) in a mass range of MBH∼ 106–1010 M⊙ lurking in central stellar bulges of galaxies. Extensive observations reveal fairly tight power laws of MBH versus the mean stellar velocity dispersion σ of the host stellar bulge.
Yu-Qing Lou, Yu-Qing Lou, Yu-Qing Lou, Yan-Fei Jiang   +3 more
openaire   +3 more sources

Shadow of a rotating squashed Kaluza-Klein black hole

Journal of High Energy Physics, 2019
We study the shadow of a rotating squashed Kaluza-Klein (KK) black hole and the shadow is found to possess distinct properties from those of usual rotating black holes.
Fen Long, Jieci Wang, Songbai Chen, Jiliang Jing   +3 more
doaj   +1 more source

Interaction of Supermassive Black Holes with their Stellar and Dark Matter Environments

, 2004
A review of recent theoretical work on the interactions of supermassive single and binary black holes with their nuclear environments, highlighting ways in which the observed structure of nuclei can be used to constrain the formation history of black ...
Merritt, David
core   +3 more sources