Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-08-19
Astronomy and Astrophysics
Astrophysics
6 pages, 10 figures, to be published in AdvSpaceRes (Proc. 34th COSPAR Assembly, Symposium E1.4), the paper with full resoluti
Scientific paper
10.1016/j.asr.2003.08.015
The North Eastern shell of SN 1006 is the most probable acceleration site of high energy electrons (up to about 100 TeV) with the Fermi acceleration mechanism at the shock front. We resolved non-thermal filaments from thermal emission in the shell with the excellent spatial resolution of Chandra. The non-thermal filaments seem thin sheets with the scales of about 1 arcsec (0.01 pc) and about 20 arcsec (0.19 pc) upstream and downstream of the shock, respectively. In a simple diffusive shock acceleration (DSA) model with the magnetic field parallel to the shock normal, the downstream region should have a highly disordered magnetic field of 30-40 micro G. The width at the upstream side is extremely small, comparable to the gyro-radius of the maximum energy electrons. This result might imply that the possible scenario is not the conventional diffusive shock acceleration with a parallel magnetic field but that with a nearly perpendicular field or electron shock surfing acceleration.
Bamba Aya
Koyama Katsuji
Ueno Maki
Yamazaki Ryo
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