Galactic dynamo and helicity losses through fountain flow

Details Galactic dynamo and helicity losses through fountain flow Galactic dynamo and helicity losses through fountain flow

2005-12-23

arxiv.org/abs/astro-ph/0512592v2

Astron.Astrophys. 448 (2006) L33-L36

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, accepted by A&A Letters

Scientific paper

10.1051/0004-6361:200600011

Nonlinear behaviour of galactic dynamos is studied, allowing for magnetic helicity removal by the galactic fountain flow. A suitable advection speed is estimated, and a one-dimensional mean-field dynamo model with dynamic alpha-effect is explored. It is shown that the galactic fountain flow is efficient in removing magnetic helicity from galactic discs. This alleviates the constraint on the galactic mean-field dynamo resulting from magnetic helicity conservation and thereby allows the mean magnetic field to saturate at a strength comparable to equipartition with the turbulent kinetic energy.

Affiliated with

Also associated with

No associations

Rating

Galactic dynamo and helicity losses through fountain flow 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 Galactic dynamo and helicity losses through fountain flow, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Galactic dynamo and helicity losses through fountain flow will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-696588