Small-scale structure of nonthermal X-rays in the historical SNRs
Abstract
The shock fronts of SNRs are the most probable acceleration sites of high energy electrons (up to ∼ 100 TeV) with the diffusive shock acceleration mechanism. However, the evolution of the acceleration in SNRs is still unclear. Using the Chandra archive data, we resolve the spatial structure of the shocked region of the five historical SNRs (Cas A, Kepler, Tycho, SN 1006, and RCW 86) in nonthermal X-rays. The nonthermal emission concentrats on very thin and filamentally regions (``filaments'') in all SNRs, as already reported in the SN 1006 case. We will also report on the time evolution of the scale length of the filaments and roll-off frequency of their spectra.
- Publication:
-
35th COSPAR Scientific Assembly
- Pub Date:
- 2004
- Bibcode:
- 2004cosp...35.3291B