Comment on the first-order Fermi acceleration at ultra-relativistic shocks

Details Comment on the first-order Fermi acceleration at ultra-relativistic shocks Comment on the first-order Fermi acceleration at ultra-relativistic shocks

2001-01-04

arxiv.org/abs/astro-ph/0101069v2

Astron.Astrophys.394:1141,2002

Astronomy and Astrophysics

Astrophysics

Substantially modified and shorted version, accepted to A&A

Scientific paper

10.1051/0004-6361:20021173

The first-order Fermi acceleration process at an ultra-relativistic shock wave is expected to create a particle spectrum with the unique asymptotic spectral index sigma_{gamma >> 1} approximately 2.2. Below, we discuss this result and differences in its various derivations, which -- explicitly or implicitly -- always require highly turbulent conditions downstream of the shock. In the presence of medium amplitude turbulence the generated particle spectrum can be much steeper than the above asymptotic one. We also note problems with application of the pitch angle diffusion model for particle transport near the ultra-relativistic shocks.

Affiliated with

Also associated with

No associations

Rating

Comment on the first-order Fermi acceleration at ultra-relativistic shocks 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 Comment on the first-order Fermi acceleration at ultra-relativistic shocks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comment on the first-order Fermi acceleration at ultra-relativistic shocks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-119803