Axisymmetric Modes in Thin Accretion Disks: Equilibrium Configurations and Instabilities

Details Axisymmetric Modes in Thin Accretion Disks: Equilibrium Configurations and Instabilities Axisymmetric Modes in Thin Accretion Disks: Equilibrium Configurations and Instabilities

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..dppbp1008k&link_type=abstract

American Physical Society, 46th Annual Meeting of the Division of Plasma Physics, 15-19 November, 2004, Savannah, GA. MEETING I

Physics

Plasma Physics

Scientific paper

In the study of astrophysical accretion disks, a key problem is the process by which angular momentum is transported outward at a rate high enough to account for the observed luminosities of accretion-powered astronomical sources. Plasma-physics processes in the disk such as the Magneto-Rotational Instability^1,2 as it would develop in a ``long cylinder'' have been put forward as an explanation for the creation of an effective turbulent viscosity to drive the transport. However, imposing the physical constraints of a geometrically thin disk leads to find instead of the ``Velikhov modes''^1 axisymmetric ballooning modes with much smaller growth rates^3 than required by observations. In the present work we review the main conclusions of the thin-disk problem and focus on the connection between these ballooning modes and the equilibrium axisymmetric configurations of magnetized disks. Preliminary numerical studies to validate our previous analytical results are also presented. Sponsored in part by the U.S. Department of Energy. [1] Velikhov, E.P., Soviet Phys.--JETP 36:995 (1959). [2] Balbus, S.A. and Hawley, J.F., ApJ 376:214 (1991). [3] Coppi, B. and Keyes, E.A., ApJ 595:1000 (2003).

Affiliated with

Also associated with

No associations

Rating

Axisymmetric Modes in Thin Accretion Disks: Equilibrium Configurations and Instabilities does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Axisymmetric Modes in Thin Accretion Disks: Equilibrium Configurations and Instabilities, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Axisymmetric Modes in Thin Accretion Disks: Equilibrium Configurations and Instabilities will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1009584