R. L. Shelton et al. 2004 ApJ 615 275 doi:10.1086/424029
G65.2+5.7: A Thermal Composite Supernova Remnant with a Cool Shell
FREER. L. Shelton1, K. D. Kuntz2 and R. Petre3
Show affiliationsThis paper presents archival ROSAT PSPC observations of the G65.2+5.7 supernova remnant (also known as G65.3+5.7). Little material obscures this remnant, and so it was well observed, even at the softest end of ROSAT's bandpass (~0.11-0.28 keV). These soft X-ray images reveal the remnant's centrally filled morphology, which, in combination with existing radio frequency observations, places G65.2+5.7 in the thermal composite (mixed-morphology) class of supernova remnants. Not only might G65.2+5.7 be the oldest known thermal composite supernova remnant, but owing to its optically revealed cool, dense shell, this remnant supports the proposal that thermal composite supernova remnants lack X-ray-bright shells because they have evolved beyond the adiabatic phase. These observations also reveal a slightly extended point source centered on R.A. 19h36m46s, decl. 30°40'07'' and extending 6
5 in radius in the band 67 map. The source of this emission has yet to be discovered, as there is no known pulsar at this location.
- Subject headings
ISM: individual (G65.2+5.7); supernova remnants; X-rays: ISM
- Dates
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Issue 1 (2004 November 1)
Received 2004 March 12, accepted for publication 2004 July 4
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G65.2+5.7: A Thermal Composite Supernova Remnant with a Cool Shell
R. L. Shelton et al. 2004 ApJ 615 275
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