Results 71 to 80 of about 32,039 (196)

Why are AGN found in High Mass Galaxies?

, 2008
We use semi-analytic models implemented in the Millennium Simulation to analyze the merging histories of dark matter haloes and of the galaxies that reside in them.
Barger, Bower, Boylan-Kolchin, Colless, Croton, De Lucia, De Lucia, De Lucia, Duschl, Ferrarese, Gebhardt, Guinevere Kauffmann, Haehnelt, Hasan, Hasinger, Heckman, Ho, Hopkins, Hopkins, Hopkins, Jiang, Kang, Kauffmann, Kauffmann, Kormendy, Lan Wang, Li, Magorrian, McCarthy, Merloni, Mihos, Richards, Spergel, Springel, Springel, Steffen, Volonteri, Wang, Weinmann, Wyithe, Zheng   +40 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

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

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

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

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

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

Supermassive Black Hole Feedback

, 2019
Understanding the processes that drive galaxy formation and shape the observed properties of galaxies is one of the most interesting and challenging frontier problems of modern astrophysics. We now know that the evolution of galaxies is critically shaped by the energy injection from accreting supermassive black holes (SMBHs). However, it is unclear how
Ruszkowski, Mateusz, Nagai, Daisuke, Zhuravleva, Irina, Brummel-Smith, Corey, Li, Yuan, Hodges-Kluck, Edmund, Yang, Hsiang-Yi Karen, Basu, Kaustuv, Chluba, Jens, Churazov, Eugene, Donahue, Megan, Fabian, Andrew, Faucher-Giguère, Claude-André, GASPARI, MASSIMO, Hlavacek-Larrondo, Julie, McDonald, Michael, McNamara, Brian, Nulsen, Paul, Mroczkowski, Tony, Mushotzky, Richard, Reynolds, Christopher, Vikhlinin, Alexey, Voit, Mark, Werner, Norbert, ZuHone, John, Zweibel, Ellen   +25 more
openaire   +6 more sources

Rotating scalarized supermassive black holes

European Physical Journal C: Particles and Fields
In this study, we investigate rotating black hole solutions within a scalar-Gauss–Bonnet gravity framework that incorporates a squared Gauss–Bonnet term. By employing a quadratic–exponential coupling function between the scalar field and the Gauss–Bonnet
Shoupan Liu, Yunqi Liu, Yan Peng, Cheng-Yong Zhang   +3 more
doaj   +1 more source

Weighing supermassive black holes [PDF]

Nature Astronomy, 2018
A study suggests that the gas clouds in the vicinity of rapidly accreting supermassive black holes are distributed in a planar distribution, impacting the estimation of the mass of the black hole based on the motion of these clouds.
openaire   +1 more source