Dynamos in resonance

Details Dynamos in resonance Dynamos in resonance

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...264..319s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 264, no. 1, p. 319-325.

Statistics

Computation

15

Astronomical Models, Dynamo Theory, Interstellar Magnetic Fields, Orbital Resonances (Celestial Mechanics), Shear Flow, Computational Astrophysics, Density Distribution, Mathematical Models, Power Spectra, Stellar Oscillations

Scientific paper

In order to investigate parametric resonance in dynamos, a simple model, where time-dependent mean shear flows influence the magnetic field of an alpha-Omega-dynamo, is examined. The possible influence of spiral density waves on dynamo waves is studied. Dynamo models with time-dependent shear flows do not lead to the classical Mathieu equation for parametric resonance. In particular, the classical resonance frequency gamma - 2omega (where omega is the cycle frequency) for the shear's oscillations no longer plays a special role in the resonance effect. Only the ratio of the various components of the flow determines the stability properties. Meridional flow supports the occurrence of 'swing excitation' while the time-dependent part of differential rotation acts to stabilize. The existence of parametric resonance by density waves in oscillating galactic dynamos is suggested.

Affiliated with

Also associated with

No associations

Rating

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

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1868244