Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-03-15
Astronomy and Astrophysics
Astrophysics
13 pages, 1 figure, accepted in Adv. Sp. Res
Scientific paper
10.1016/j.asr.2005.03.047
X-ray synchrotron emission tells us of the highest energy reached by accelerated electrons. In a few supernova remnants (SN 1006, G347.3-0.5) this is the dominant form of X-ray radiation, but in most it is superposed to the dominant thermal emission. Thanks to the spectro-imaging capability of Chandra and XMM-Newton, X-ray synchrotron emission has now been unambiguously detected in most young supernova remnants (Cas A, Tycho, Kepler). It arises in a very thin shell (a few arcsecs) at the blast wave. The thinness of that shell (much broader in the radio domain) implies that the high energy electrons cool down very fast behind the shock. The magnetic field that one deduces from that constraint is more than 100 muG behind the shock.
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