Results 51 to 60 of about 36,081 (203)

Formation of Supermassive Black Holes

, 2010
Evidence shows that massive black holes reside in most local galaxies. Studies have also established a number of relations between the MBH mass and properties of the host galaxy such as bulge mass and velocity dispersion.
A Freise, A Heger, A Loeb, A Marconi, A Marconi, A Merloni, A Merloni, A Sesana, A Soltan, AJ Barth, AJ Barth, AM Ghez, AV Gruzinov, B Devecchi, BJ Carr, BJ Carr, C Alcock, C Lacey, CF McKee, CJ Willott, CJ Willott, CL Fryer, D Merritt, D Reed, D Spolyar, DJ Eisenstein, DN Page, E Berti, E Gallo, E Quataert, E Ripamonti, E Ripamonti, EH Wehner, F Hoyle, F Iocco, F Santoro, FC Bosch van den, G Ghisellini, G Lodato, HJ Mo, I Shlosman, J Diemand, J Kormendy, J Magorrian, JA Regan, JC Tan, JC Vernaleo, JE Greene, JF Navarro, JH Wise, JL Johnson, JR Bond, JS Bullock, K Freese, K Gebhardt, K Gebhardt, K Gültekin, K Omukai, K Omukai, KG Arun, L Ferrarese, L Ferrarese, L Ferrarese, L Gao, L Spitzer, LC Ho, M Ajello, M Dijkstra, M Elvis, M Freitag, M Freitag, M Mateo, M Milosavljević, M Ricotti, M Saijo, M Shibata, M Spaans, M Tegmark, M Trenti, M Valluri, M Volonteri, M Volonteri, M Volonteri, M Volonteri, M Volonteri, M Walter, MA Abramowicz, MA Abramowicz, MA Gürkan, MA Gürkan, Marta Volonteri, MC Aller, MC Begelman, MC Begelman, MC Begelman, MC Begelman, MC Begelman, MC Begelman, MC Miller, MG Haehnelt, MG Walker, MG Walker, MJ Turk, MS Bovill, MY Khlopov, N Häring, N Yoshida, NY Gnedin, P Côté, P Madau, PC Clark, PF Hopkins, Q Yu, R Decarli, R Salvaterra, R Schneider, R Schödel, RD Blandford, RD Blandford, RK Sheth, RP Kudritzki, S Hawking, S Tremaine, SA Hughes, SDM White, SE Woosley, SF Portegies Zwart, SF Portegies Zwart, SF Portegies Zwart, SL Shapiro, SM Koushiappas, SP Oh, SR Majewski, T Abel, T Ebisuzaki, T Tanaka, TH Greif, TW Baumgarte, V Bromm, V Bromm, V Bromm, V Springel, VR Eke, W Zhang, X Fan, X Fan, X Fan, YB Zeldovich, YB Zel’Dovich, Z Barkat, Z Haiman   +150 more
core   +1 more source

Probing extreme black‐hole outflows on short timescales via high spectral‐resolution x‐ray imagers

Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.
Abstract We investigate outflows and the physics of super‐Eddington versus sub‐Eddington regimes in black hole systems. Our focus is on prospective science using next‐generation high‐resolution soft x‐ray instruments. We highlight the properties of black hole ultraluminous x‐ray source (ULX) systems in particular. Owing to scale invariance in accreting
C. Pinto, J. F. Steiner, A. Bodaghee, P. Chakraborty, M. Sobolewska, D. R. Pasham, A. Ogorzalek, J. Zuhone, A. Bogdan, M. Vogelsberger   +9 more
wiley   +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

Searching for ultra-light bosons and constraining black hole spin distributions with stellar tidal disruption events

Nature Communications, 2022
Stellar tidal disruption events (TDEs) occur when stars pass close enough to supermassive black holes. Here, the authors show that future searches TDEs have potential to uncover the existence of ultralight bosons.
Peizhi Du, Daniel Egaña-Ugrinovic, Rouven Essig, Giacomo Fragione, Rosalba Perna   +4 more
doaj   +1 more source

Measuring spin of a supermassive black hole at the Galactic centre -- Implications for a unique spin

, 2010
We determine the spin of a supermassive black hole in the context of discseismology by comparing newly detected quasi-periodic oscillations (QPOs) of radio emission in the Galactic centre, Sagittarius A* (Sgr A*), as well as infrared and X-ray emissions ...
Abramowicz, Baganoff, Bardeen, Bardeen, Beskin, Blandford, Bélanger, Gammie, Genzel, Ghez, Gierliński, Gillessen, H. Negoro, Hamaus, Hawley, Hirose, Homan, Kato, Kato, Kato, Kato, Kato, King, M. Miyoshi, Machida, Markowitz, McKinney, Moderski, Novikov, Nowak, Okazaki, Orosz, Page, R. Matsumoto, R. Takahashi, Remillard, Schödel, Shakura, Shapiro, Takahashi, Volonteri, Wilson, Y. Kato, Yuan, Yusef-Zadeh   +44 more
core   +1 more source

Asymptotically‐Flat Black Hole Solutions in Symmergent Gravity

Fortschritte der Physik, Volume 72, Issue 4, April 2024.
Abstract Symmergent gravity is an emergent gravity model with an R+R2$R+R^2$ curvature sector and an extended particle sector having new particles beyond the known ones. With constant scalar curvature, asymptotically flat black hole solutions are known to have no sensitivity to the quadratic curvature term (coefficient of R2$R^2$). With variable scalar
Beyhan Puliçe, Reggie C. Pantig, Ali Övgün, Durmuş Demir   +3 more
wiley   +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

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

Differential rotation in compact objects with hyperons and delta isobars

Astronomische Nachrichten, Volume 345, Issue 2-3, February-March 2024.
Abstract Neutron stars may experience differential rotation on short, dynamical timescales following extreme astrophysical events like binary neutron star mergers. In this work, the masses and radii of differentially rotating neutron star models are computed.
Delaney Farrell, Fridolin Weber, Jia Jie Li, Armen Sedrakian   +3 more
wiley   +1 more source

Probing the formation of the seeds of supermassive black holes with gravitational waves

, 2018
The existence of black holes in the intermediate mass interval between one hundred and ten thousand solar masses, filling the gap between the stellar and the supermassive black holes is a key prediction to explain the origin of luminous QSOs at redshifts
Colpi, Monica
core   +1 more source