Conference item
Magnetic field amplification by cosmic rays in supernova remnants
- Abstract:
- Magnetic field amplification is needed to accelerate cosmic cays to PeV energies in supernova remants. Escaping cosmic rays trigger a return current in the plasma that drives a non-resonant hybrid instability. We run simulations in which we represent the escaping cosmic rays with the plasma return current, keeping the maximum cosmic ray energy fixed, and evaluate its effects on the upstream medium. In addition to magnetic field amplification, density perturbations arise that, when passing through the shock, further increase amplification levels downstream. As the growth rate of the instability is most rapid for the smaller scales, the resolution is a limiting factor in the amplification that can be reached with these simulations.
- Publication status:
- Published
Actions
Authors
- Host title:
- 370 YEARS OF ASTRONOMY IN UTRECHT
- Volume:
- 470
- Pages:
- 209-214
- Publication date:
- 2012-09-13
- ISBN:
- 9781583818244
- Keywords:
- Pubs id:
-
pubs:430339
- UUID:
-
uuid:37f120fb-22b0-4e70-9460-44e612fdd877
- Local pid:
-
pubs:430339
- Source identifiers:
-
430339
- Deposit date:
-
2013-11-17
Terms of use
- Copyright date:
- 2012
- Notes:
-
4 pages, 2 figures, to appear in the proceedings of the conference
"370 years of Astronomy in Utrecht", eds. G. Pugliese, A. de Koter and M.
Wijburg
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