The Mipsgal View of Supernova Remnants in the Galactic Plane
D. Pinheiro Goncalves, A. Noriega-Crespo, R. Paladini, P.G. Martin, S., J. Carey

TL;DR
This study uses Spitzer Space Telescope data to detect and analyze Galactic supernova remnants in the mid-infrared, revealing their infrared properties, correlations with radio and X-ray emissions, and insights into their energy output.
Contribution
First mid-infrared survey of Galactic SNRs using MIPS, identifying 39 remnants and analyzing their multi-wavelength properties and emission ratios.
Findings
Detected 39 out of 121 SNRs in mid-infrared.
Infrared flux ratios show linear trends and correlations with radio emission.
Infrared energy emission is comparable to X-ray cooling.
Abstract
We report the detection of Galactic supernova remnants (SNRs) in the mid-infrared (at 24 and 70 {\mu}m), in the coordinate ranges 10 < l < 65 deg and 285 < l < 350 deg, |b| < 1 deg, using the Multiband Imaging Photometer (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 [F8/F24] versus [F70/F24]. We compare their infrared fluxes with their corresponding radio flux at 1.4 GHz and find that most remnants have ratios of 70 {\mu}m to 1.4 GHz characteristic of SNRs (with the exception of a few which have ratios closer to those of H II regions). Furthermore, we retrieve a slope close to unity when…
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Taxonomy
TopicsAstrophysics and Cosmic Phenomena · Solar and Space Plasma Dynamics · Gamma-ray bursts and supernovae
