Accretion and galactic dynamos

Details Accretion and galactic dynamos Accretion and galactic dynamos

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...358.1142m&link_type=abstract

Astronomy and Astrophysics, v.358, p.1142-1150 (2000)

Astronomy and Astrophysics

Astrophysics

9

Accretion, Accretion Disks, Magnetic Fields, Ism: Magnetic Fields, Galaxies: Magnetic Fields

Scientific paper

We show that radial flows (directed either inward or outward) suppress mean-field dynamo action in a thin disc. Under conditions typical of spiral galaxies, the reduction in the growth rate of the large-scale magnetic field can reach 25-30%. The dynamo-generated galactic magnetic fields themselves can drive radial flows at a rate of order 0.1 M_sun yr-1. These radial flows can contribute to the saturation of the dynamo action together with other nonlinear effects. We also present arguments, and an illustrative computation, to support the view that in the inner regions of barred galaxies the magnetically driven mass accretion rate may be substantially larger than the above estimate due to deviations of magnetic field from axial symmetry. The magnetically driven inflow rate in barred galaxies can reach about 3 M_sun yr-1.

Affiliated with

Also associated with

No associations

Rating

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

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1387245