Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-04-29
Astrophys.J. 633 (2005) 328-333
Astronomy and Astrophysics
Astrophysics
7 pages, 4 figures
Scientific paper
10.1086/447762
In dilute astrophysical plasmas, the collisional mean free path of a particle can exceed its Larmor radius. Under these conditions, the thermal conductivity and viscosity of the plasma can be dramatically altered. This alteration allows outwardly decreasing angular velocity or temperature gradients to become strongly destabilizing. This paper generalizes an earlier, simple analysis of the viscosity instability, by including the dynamical effects of magnetic field line tension. Such effects lower the growth rates found in the absence of such tension, but still allow growth rates in excess of the maximum of the standard magnetorotational instability. We find very good quantitative agreement with more complex kinetic treatments of the same process. The combination of large growth rates and large magnetic Prandtl number suggest that protogalactic disks are powerful dynamos.
Balbus Steven
Islam Tanim
No associations
LandOfFree
The Dynamics of the Magnetoviscous Instability 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 The Dynamics of the Magnetoviscous Instability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Dynamics of the Magnetoviscous Instability will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-402894