scholarly journals Local Three‐dimensional Simulations of Magnetorotational Instability in Radiation‐dominated Accretion Disks

2003 ◽  
Vol 593 (2) ◽  
pp. 992-1006 ◽  
Author(s):  
N. J. Turner ◽  
J. M. Stone ◽  
J. H. Krolik ◽  
T. Sano
Keyword(s):  
Accretion Disks ◽  
Three Dimensional ◽  
Magnetorotational Instability ◽  
Three Dimensional Simulations

scholarly journals 8.10. Three-dimensional global MHD simulations of jet formation in active galactic nuclei

1998 ◽  
Vol 184 ◽  
pp. 363-364
Author(s):  
R. Matsumoto ◽  
K. Shibata
Keyword(s):  
Active Galactic Nuclei ◽  
Accretion Disks ◽  
Three Dimensional ◽  
Galactic Nuclei ◽  
Equatorial Region ◽  
Astrophysical Jets ◽  
Magnetorotational Instability ◽  
Jet Formation ◽  
Mhd Simulations ◽  
Avalanche Flow

Magnetically driven jets from accretion disks are considered to be the most promising models of astrophysical jets. Uchida & Shibata (1985) and Shibata & Uchida (1986) first carried out two-dimensional nonlinear MHD simulations of jet formation from a magnetized disk. Matsumoto et al. (1996) applied the Uchida-Shibata model to a gas torus in active galactic nuclei and showed that the surface layer of the torus accretes faster than the equatorial region like an avalanche because magnetic braking most effectively extracts angular momentum from that layer. A magnetized torus subjects to global non-axisymmetric instabilities (Curry & Pudritz 1996) and local magnetorotational instability (Balbus & Hawley 1991). We carried out three-dimensional global MHD simulations to show the non-axisymmetric effects on the torus, avalanche flow and jet formation.

scholarly journals Three-Dimensional Simulations of Accretion Disks

1997 ◽  
Vol 163 ◽  
pp. 179-189 ◽  
Author(s):  
John F. Hawley ◽  
Steven A. Balbus
Keyword(s):  
Angular Momentum ◽  
Accretion Disk ◽  
Accretion Disks ◽  
Three Dimensional ◽  
Spiral Waves ◽  
Central Issue ◽  
Transport Mechanisms ◽  
Mhd Turbulence ◽  
Mhd Instability ◽  
Three Dimensional Simulations

AbstractThe transport of angular momentum is the central issue in accretion disk dynamics. We review recent three-dimensional simulations that investigate possible transport mechanisms. Purely hydrodynamic local instabilities and turbulence are ruled out; global spiral waves remain a possibility. MHD turbulence, arising from a local MHD instability, has been shown effective in transporting angular momentum at dynamically important rates. These results establish the basic picture of accretion disk transport.

scholarly journals Three-Dimensional Simulations of Magnetized Thin Accretion Disks around Black Holes: Stress in the Plunging Region

2008 ◽  
Vol 687 (1) ◽  
pp. L25-L28 ◽  
Author(s):  
Rebecca Shafee ◽  
Jonathan C. McKinney ◽  
Ramesh Narayan ◽  
Alexander Tchekhovskoy ◽  
Charles F. Gammie ◽  
...  
Keyword(s):  
Black Holes ◽  
Accretion Disks ◽  
Three Dimensional ◽  
Three Dimensional Simulations
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