Global simulations of galactic dynamo driven by cosmic-rays and exploding magnetized stars

Details Global simulations of galactic dynamo driven by cosmic-rays and exploding magnetized stars Global simulations of galactic dynamo driven by cosmic-rays and exploding magnetized stars

2008-12-31

arxiv.org/abs/0901.0116v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

2 pages, 2 figures, To be published in "Cosmic Magnetic Fields: From Planets, to Stars and Galaxies", K.G. Strassmeier, A.G. K

Scientific paper

10.1017/S1743921309031275

We conduct global galactic--scale magnetohydrodynamical (MHD) simulations of the cosmic--ray driven dynamo. We assume that exploding stars deposit small--scale, randomly oriented, dipolar magnetic fields into the differentially rotating ISM, together with a portion of cosmic rays, accelerated in supernova shocks. Our simulations are performed with the aid of a new parallel MHD code PIERNIK. We demonstrate that dipolar magnetic fields supplied on small SN--remnant scales, can be amplified exponentially by the CR--driven dynamo to the present equipartition values, and transformed simultaneously to large galactic--scales by an inverse cascade promoted by resistive processes.

Affiliated with

Also associated with

No associations

Rating

Global simulations of galactic dynamo driven by cosmic-rays and exploding magnetized stars 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 Global simulations of galactic dynamo driven by cosmic-rays and exploding magnetized stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Global simulations of galactic dynamo driven by cosmic-rays and exploding magnetized stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-536960