Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-04-09
Astronomy and Astrophysics
Astrophysics
13 pages, 7 figures. Invited review to appear in "High Energy Studies of Supernova Remnants and Neutron Stars" (COSPAR 2002),
Scientific paper
10.1016/j.asr.2003.05.012
The last ten years a number of observational advances have substantially increased our knowledge of shock phenomena in supernova remnants. This progress has mainly been made possible by the recent improvements in X-ray and Gamma-ray instrumentation. It has become clear that some shell-type supernova remnants, e.g. SN 1006, have X-ray emission dominated by synchrotron radiation, proving that electrons are accelerated up to 100 TeV. This is still an order of magnitude below 3E15 eV, at which energy the ion cosmic ray spectrum at earth shows a spectral break. So one of the major goals is to prove that supernova remnants are capable of accelerating ions at least up that energy. Here I review the evidence that ions and electrons are accelerated up to energies ~100 TeV in supernova remnants, and, in addition, the recent progress that has been made in understanding the physics of collisionless shock fronts and the magnetic fields inside supernova remnants.
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