# Compressibility and local instabilities of differentially rotating magnetized gas

Astronomy and Astrophysics – Astrophysics

Scientific paper

[ 0.00 ] – not rated yet Voters 0   Comments 0

## Details Compressibility and local instabilities of differentially rotating magnetized gas Compressibility and local instabilities of differentially rotating magnetized gas

29 pages, 9 figures, accepted for publication in ApJ

Scientific paper

10.1086/518231

We study the stability of compressible cylindrical differentially rotating flow in the presence of the magnetic field, and show that compressibility alters qualitatively the stability properties of flows. Apart from the well-known magnetorotational instability that can occur even in incompressible flow, there exist a new instability caused by compressibility. The necessary condition of the newly found instability can easily be satisfied in various flows in laboratory and astrophysical conditions and reads $B_{s} B_{\phi} \Omega' \neq 0$ where $B_{s}$ and $B_{\phi}$ are the radial and azimuthal magnetic fields, $\Omega' =d \Omega/ds$ with $s$ being the cylindrical radius. Contrary to the magnetorotational instability that occurs only if $\Omega$ decreases with $s$, the newly found instability operates at any sign of $\Omega'$. The considered instability can arise even in a very strong magnetic field that suppresses the magnetorotational instability.

No associations

LandOfFree

## Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

## Rating

Compressibility and local instabilities of differentially rotating magnetized gas 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 Compressibility and local instabilities of differentially rotating magnetized gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compressibility and local instabilities of differentially rotating magnetized gas will most certainly appreciate the feedback.

Profile ID: LFWR-SCP-O-122828

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.