The Complex Region Containing the Gamma-cygni Supernova Remnant
Abstract
The gamma Cygni supernova remnant is studied with new radio continuum and HI observations and archival ROSAT and CHANDRA X-ray observations. The atomic hydrogen (HI) line and radio continuum data yield a new HI absorption distance to gamma Cygni (G78.2+2.1) with a corresponding HI column density. New x-ray images of the region including the supernova remnant G78.2+2.1 are constructed from the ROSAT survey and from the Chandra and ROSAT pointed observations. The association of the non-thermal radio emission from the remnant with the corresponding X-ray shells is discussed. The high (spectral and spatial) resolution Chandra data is used to study the nature of G78.2 and of a second overlapping X-ray shell, previously believed to be associated with G78.2+2.1, but now shown to be a foreground object. We also examine compact and extended sources of hard x-ray emission previously thought to coincide with the remnant.
- Publication:
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AAS/High Energy Astrophysics Division #13
- Pub Date:
- April 2013
- Bibcode:
- 2013HEAD...1312714L