Results 21 to 30 of about 52,369 (293)

On the Formation and Interaction of Multiple Supermassive Stars in Cosmological Flows

The Astrophysical Journal, 2023
Supermassive primordial stars with masses exceeding ∼10 ^5 M _⊙ that form in atomically cooled halos are the leading candidates for the origin of high-redshift quasars at z > 6.
Tyrone E. Woods, Samuel Patrick, Daniel J. Whalen, Alexander Heger   +3 more
doaj   +1 more source

Radiation-Driven Warping: The Origin of Warps and Precession in Accretion Disks [PDF]

, 1996
A geometrically thin, optically thick, warped accretion disk with a central source of luminosity is subject to non-axisymmetric forces due to radiation pressure; the resulting torque acts to modify the warp.
J. E. Pringle, Mitchell C. Begelman, Philip R. Maloney, Pringle J. E., Zwitter T.   +4 more
core   +2 more sources

Accretion Disks in Algols [PDF]

International Astronomical Union Colloquium, 1989
AbstractBasic theoretical concepts concerning formation and properties of disKs in close binary systems are reviewed and compared with observations of Algols.
openaire   +1 more source

Selfgravity and QSO disks [PDF]

, 2001
It is well known that the outer parts of QSO accretion disks are prone to selfgravity if heated solely by orbital dissipation. Such disks might be expected to form stars rather than accrete onto the black hole.
Ayal, Balbus, Balbus, Begelman, Bertin, Bertin, Bertin, Binney, Blandford, Brandenburg, Cameron, Cannizzo, Cao, Collin, Collin, Ebisuzaki, Evans, Galeev, Gammie, Gammie, Gebhardt, Greenhill, Greenhill, Hawley, Heyvaerts, Hills, Ichimaru, Illarionov, Jeremy Goodman, Kalnajs, Keady, Kumar, Kurucz, Lacy, Larson, Lee, Lightman, Lin, Lodato, Lynden-Bell, Maoz, Martin, Matsumoto, McLure, McMillan, Menou, Merloni, Merritt, Miller, Monaghan, Mukai, Nakai, Narayan, Neufeld, Ogilvie, Paczyński, Pariev, Pringle, Ramsay, Rees, Rees, Salpeter, Sanders, Sellwood, Shakura, Shapiro, Shlosman, Shlosman, Shu, Sirko, Spitzer, Spitzer, Stone, Zel'dovich   +73 more
core   +3 more sources

Luminous Hot Accretion Disks [PDF]

Monthly Notices of the Royal Astronomical Society, 2001
We find a new two-temperature hot branch of equilibrium solutions for stationary accretion disks around black holes. In units of Eddington accretion rate defined as $10L_{\rm Edd}/c^2$, the accretion rates to which these solutions correspond are within the range $\dot{m}_1 \la \dot{m} \la 1$, here $\dot{m}_1$ is the critical rate of advecti$.
openaire   +3 more sources

Neutrino Interactions in the Outflow from Gamma-Ray Burst Accretion Disks

, 2004
We examine the composition of matter as it flows away from gamma ray burst accretion disks, in order to determine what sort of nucleosynthesis may occur.
McLaughlin, G. C., Surman, R.
core   +1 more source

Microflares in accretion disks [PDF]

, 2002
We have investigated the phenomenon of explosive chromospheric evaporation from an accretion disk as a mechanism for fast variability in accreting sources such as low mass X-ray binaries and active galactic nuclei.
Abramowicz, Antonucci, Bastian, Chakrabarti, Chakrabarti, di Matteo, Esin, Esin, Fisher, Fisher, Galeev, Haardt, Hawley, Krishan, Krishan, Lakhina, Lasota, Lawrence, McClymont, Miller, Narayan, Narayan, P. J. Wiita, Parker, Raymond, Robinson, S. Ramadurai, Shakura, Tanaka, Trudolyubov, Turner, V. Krishan, Wagner, White   +33 more
core   +3 more sources

Slim accretion disks

The Astrophysical Journal, 1988
In a recent paper, Abramowicz, Czerny, Lasota and Szuszkiewicz (1988) have found a new branch of equilibrium solutions for stationary accretion discs around black holes. These solutions correspond to moderately super-Eddington accretion rates. The existence of the new branch is a consequence of cooling due to general relativistic Roche lobe overflow ...
M. A. Abramowicz, B. Czerny, J. P. Lasota, E. Szuszkiewicz   +3 more
openaire   +1 more source

Horizon-Penetrating Transonic Accretion Disks around Rotating Black Holes

, 2007
The stationary hydrodynamic equations for the transonic accretion disks and flows around rotating black holes are presented by using the Kerr-Schild coordinate where there is no coordinate singularity at the event horizon.
Takahashi, Rohta
core   +1 more source

Laboratory modeling of MHD accretion disks

Comptes Rendus. Physique
This review article summarizes two decades of laboratory research aimed at understanding the dynamics of accretion disks, with particular emphasis on magnetohydrodynamic experiments involving liquid metals and plasmas.
Gissinger, Christophe
doaj   +1 more source