Parker-Jeans instability of gaseous disks

Details Parker-Jeans instability of gaseous disks Parker-Jeans instability of gaseous disks

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasj...43..685n&link_type=abstract

Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 43, no. 5, 1991, p. 685-702.

Statistics

Computation

20

Computational Astrophysics, Gravitational Effects, Interstellar Gas, Jeans Theory, Magnetohydrodynamic Stability, Molecular Clouds, Asymptotic Methods, Equilibrium Equations, Galactic Structure, Interstellar Magnetic Fields, Star Formation

Scientific paper

The magnetohydrodynamical instability of self-gravitating magnetized gaseous disks is investigated by means of a normal-mode analysis. The growth rates and eigenfunctions of unstable perturbations are obtained numerically. The perturbed disks are shown graphically. In the equilibrium model disk the Jeans mode has a larger growth rate than does the Parker mode when either the magnetic field is weak or the wavelength of the perturbation is long. The Parker instability dominates when the magnetic field is strong and the wavelength is short. The Jeans instability primarily disturbs the high-density region near the midplane; the Parker instability disturbs mainly the low-density region far from the midplane. The growth rate of the Jeans instability is at a maximum when the wave vector of the perturbation is parallel to the magnetic field. On the other hand, that of the Parker instability is at a maximum when the wavenumber in the direction perpendicular to the magnetic field is infinitely large.

Affiliated with

Also associated with

No associations

Rating

Parker-Jeans instability of gaseous disks 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 Parker-Jeans instability of gaseous disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Parker-Jeans instability of gaseous disks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1876749