Magnetic Diffusion in Stratified Atmospheres

Details Magnetic Diffusion in Stratified Atmospheres Magnetic Diffusion in Stratified Atmospheres

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001apj...548.1093d&link_type=abstract

The Astrophysical Journal, Volume 548, Issue 2, pp. 1093-1101.

Astronomy and Astrophysics

Astronomy

4

Convection, Magnetohydrodynamics: Mhd, Stars: Interiors, Sun: Magnetic Fields

Scientific paper

The predictions from mean field electrodynamics have been questioned because of the strong feedback of small-scale magnetic structure on the velocity fields. In two dimensions, this nonlinear feedback results in a lengthening of the turbulent decay time. In three dimensions α-quenching is predicted. Previous studies assumed a homogeneous fluid. We will present recent results from two-dimensional compressible MHD decay simulations in a highly stratified atmosphere that more closely resembles the solar convection zone. Our results show that the field geometry has a strong influence on the decay rate: vertical fields remain fairly constant for a period of time and then rapidly decay on the turbulent timescale; horizontal fields decay at an intermediate rate with strong fields persisting near the top and bottom boundaries. The implication of our results for understanding solar active region decay is discussed.

Affiliated with

Also associated with

No associations

Rating

Magnetic Diffusion in Stratified Atmospheres 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 Magnetic Diffusion in Stratified Atmospheres, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic Diffusion in Stratified Atmospheres will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1713159