Results 81 to 90 of about 8,827 (222)
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 +9 more
wiley +1 more source
On the hydrodynamic interplay between a young nuclear starburst and a central supermassive black hole [PDF]
, 2010 We present one-dimensional numerical simulations, which consider the effects of radiative cooling and gravity on the hydrodynamics of the matter reinserted by stellar winds and supernovae within young nuclear starbursts (NSBs) with a central supermassive
GUILLERMO TENORIO TAGLE +2 more
core
Supermassive black hole binaries at high energies [PDF]
, 2022 An accretion disk around a supermassive black hole may be strongly perturbed by the presence of a secondary black hole. Recent simulations have shown that, under certain conditions, the tidal torques exerted by the secondary black hole may open an ...
Vila, Gabriela Soledad +2 more
core
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 +3 more
wiley +1 more source
Clustering and redshift-space distortions in QSO and galaxy surveys [PDF]
, 2006 In this thesis, we exploit the potential of existing QSO and galaxy surveys for investigating the nature of the large scale structure in the Universe. A detailed analysis of clustering and redshift- space distortions allows us to constrain cosmological ...
Cruz da Angela, José Antonio +1 more
core
Supermassive black hole binaries at high energies [PDF]
, 2014 An accretion disk around a supermassive black hole may be strongly perturbed by the presence of a secondary black hole. Recent simulations have shown that, under certain conditions, the tidal torques exerted by the secondary black hole may open an ...
Vila, Gabriela Soledad +2 more
core +1 more source
Null Geodesics and Strong Field Gravitational Lensing in a String Cloud Background
Advances in High Energy Physics, 2015 This paper is devoted to studying two interesting issues of a black hole with string cloud background. Firstly, we investigate null geodesics and find unstable orbital motion of particles. Secondly, we calculate deflection angle in strong field limit. We
M. Sharif, Sehrish Iftikhar
doaj +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 +3 more
wiley +1 more source
The formation of satellite galaxies and their associated black holes [PDF]
, 2006 Not ...
Libeskind, Noam Isaac
core
DO CIRCUMNUCLEAR DENSE GAS DISKS DRIVE MASS ACCRETION ONTO SUPERMASSIVE BLACK HOLES [PDF]
, 2016 We present a positive correlation between the mass of dense molecular gas (Mdense) of ~ 100 pc scale circumnuclear disks (CNDs) and the black hole mass accretion rate (M_ BH) in total 10 Seyfert galaxies, based on data compiled from the literature and an
Kawakatu Nozomu +2 more
core +2 more sources