The MIPSGAL View of Supernova Remnants in the Galactic Plane

August 2011 • 2011AJ....142...47P

Authors • Pinheiro Gonçalves, D. • Noriega-Crespo, A. • Paladini, R. • Martin, P. G. • Carey, S. J.

Abstract • We report the detection of Galactic supernova remnants (SNRs) in the mid-infrared (at 24 and 70 μm), in the coordinate ranges 10° < l < 65° and 285° < l < 350°, |b| < 1°, using MIPS aboard the Spitzer Space Telescope. We search for infrared counterparts to SNRs in Green's catalog and identify 39 out of 121, i.e., a detection rate of about 32%. Such a relatively low detection fraction is mainly due to confusion with nearby foreground/background sources and diffuse emission. The SNRs in our sample show a linear trend in [F ₈/F ₂₄] versus [F ₇₀/F ₂₄]. We compare their infrared fluxes with their corresponding radio flux at 1.4 GHz and find that most remnants have a ratio of 70 μm to 1.4 GHz which is similar to those found in previous studies of SNRs (with the exception of a few that have ratios closer to those of H II regions). Furthermore, we retrieve a slope close to unity when correlating infrared (24 and 70 μm) with 1.4 GHz emission. Our survey is more successful in detecting remnants with bright X-ray emission, which we find is well correlated with the 24 μm morphology. Moreover, by comparing the power emitted in the X-ray, infrared, and radio, we conclude that the energy released in the infrared is comparable to the cooling in the X-ray range.

Links

• SIMBAD http://simbad.u-strasbg.fr/simbo.pl?bibcode=2011AJ....142...47P
• PDF https://stacks.iop.org/1538-3881/142/47/pdf
• PREPRINT http://arxiv.org/abs/1104.2894
• DATA https://irsa.ipac.caltech.edu/bibdata/2011/P/2011AJ....142...47P.html
• ELECTR https://doi.org/10.1088%2F0004-6256%2F142%2F2%2F47
• SPIRES http://inspirehep.net/search?p=find+eprint+arXiv:1104.2894