Evolution of Magnetic Fields and Cosmic Ray Acceleration in Supernova Remnants

Details Evolution of Magnetic Fields and Cosmic Ray Acceleration in Supernova Remnants Evolution of Magnetic Fields and Cosmic Ray Acceleration in Supernova Remnants

2009-05-07

arxiv.org/abs/0905.1134v1

Adv.Space Res.44:433-439,2009

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

7 pages, 7 figures, to appear in Advances in Space Research

Scientific paper

10.1016/j.asr.2009.05.010

Observations show that the magnetic field in young supernova remnants (SNRs) is significantly stronger than can be expected from the compression of the circumstellar medium (CSM) by a factor of four expected for strong blast waves. Additionally, the polarization is mainly radial, which is also contrary to expectation from compression of the CSM magnetic field. Cosmic rays (CRs) may help to explain these two observed features. They can increase the compression ratio to factors well over those of regular strong shocks by adding a relativistic plasma component to the pressure, and by draining the shock of energy when CRs escape from the region. The higher compression ratio will also allow for the contact discontinuity, which is subject to the Rayleigh-Taylor (R-T) instability, to reach much further out to the forward shock. This could create a preferred radial polarization of the magnetic field. With an adaptive mesh refinement MHD code (AMRVAC), we simulate the evolution of SNRs with three different configurations of the initial CSM magnetic field, and look at two different equations of state in order to look at the possible influence of a CR plasma component. The spectrum of CRs can be simulated using test particles, of which we also show some preliminary results that agree well with available analytical solutions.

Affiliated with

Also associated with

No associations

Rating

Evolution of Magnetic Fields and Cosmic Ray Acceleration in Supernova Remnants 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 Evolution of Magnetic Fields and Cosmic Ray Acceleration in Supernova Remnants, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of Magnetic Fields and Cosmic Ray Acceleration in Supernova Remnants will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-703141