A kinetic approach to cosmic ray induced streaming instability at supernova shocks
Journal Article
·
OSTI ID:935803
We show here that a purely kinetic approach to the excitation of waves by cosmic rays in the vicinity of a shock front leads to predict the appearance of a non-alfvenic fastly growing mode which has the same dispersion relation as that previously found by Bell (2004) by treating the plasma in the MHD approximation. The kinetic approach allows us to investigate the dependence of the dispersion relation of these waves on the microphysics of the current which compensates the cosmic ray flow. We also show that a resonant and a non-resonant mode may appear at the same time and one of the two may become dominant on the other depending on the conditions in the acceleration region. We discuss the role of the unstable modes for magnetic field amplification and particle acceleration in supernova remnants at different stages of the remnant evolution.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 935803
- Report Number(s):
- FERMILAB-PUB-08-156-A; arXiv eprint number arXiv:0806.1223
- Country of Publication:
- United States
- Language:
- English
Similar Records
On the Background-gyroresonant Character of Bell’s Instability in the Large-current Regime
THE NONLINEAR SATURATION OF THE NON-RESONANT KINETICALLY DRIVEN STREAMING INSTABILITY
Cosmic Ray Acceleration in Supernova Remnants
Journal Article
·
Thu Feb 07 19:00:00 EST 2019
· The Astrophysical Journal (Online)
·
OSTI ID:1544083
THE NONLINEAR SATURATION OF THE NON-RESONANT KINETICALLY DRIVEN STREAMING INSTABILITY
Journal Article
·
Tue Mar 09 23:00:00 EST 2010
· Astrophysical Journal Letters
·
OSTI ID:21305101
Cosmic Ray Acceleration in Supernova Remnants
Journal Article
·
Mon Nov 21 23:00:00 EST 2005
· AIP Conference Proceedings
·
OSTI ID:20719685