XMM-Newton observation of the northeastern limb of the Cygnus Loop
Abstract
In 1999, Miyata et al. analyzed the northeastern region of the Cygnus Loop in the 0.5-3 keV energy band using ASCA data, and found significant variations in the abundances of heavy elements toward the center of the Loop. Recently we have acquired an XMM-Newton observation of the same region, and because of the high performance of the satellite, we were able to extend the energy range down to 0.3 keV. Thus, our data have become sensitive to emission from C and N, and we were able to place constraints on the respective abundances for the first time. For the fitting of our background substracted spectra we have used a non-equilibrium ionization (NEI) model, and from our analysis we were able to confirm that the electron temperature increases, while the ionization timescale decreases toward the center. At the symposium we will present our complete results regarding the northeastern limb of the Cygnus Loop.
- Publication:
-
35th COSPAR Scientific Assembly
- Pub Date:
- 2004
- Bibcode:
- 2004cosp...35.2625N