Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc..275s&link_type=abstract
International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 275 - 276
Astronomy and Astrophysics
Astrophysics
Cygnus Loop: Structure, Cygnus Loop: Temperatures, Cygnus Loop: X-Ray Spectra, Cygnus Loop: Element Abundances
Scientific paper
The authors have analysed together ROSAT and ASCA observations of the northern section of the Cygnus Loop supernova remnant. The ROSAT data were convolved with the ASCA point spread function for that purpose. The ASCA (SIS) data have superior energy resolution, whereas the ROSAT data have better statistics and reach lower energy. In this region a double shell structure is apparent, more contrasted at lower energy. The authors relate this to late influence of the ejecta, in the hypothesis of a massive progenitor. For spectral purposes, the data were summed within boxes of 50 to 100 arcmin2 following the emission structures. The spectra may be represented by a sum of two components at equilibrium (around 0.1 and 0.4 keV, respectively), with free abundances for the high temperature component. The higher temperature increases slowly away from the shock front. The authors find normal abundances except for iron (around 0.3).
Ballet Jean
Decourchelle Anne
Sauvageot Jean-Luc
Tsunemi Hiroshi
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