The Mipsgal View of Supernova Remnants in the Galactic Plane
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 correlating infrared (24 and 70 {\mu}m) 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 {\mu}m morphology. Moreover, by comparing the power emitted in X-ray, infrared and radio, we conclude that the energy released in the infrared is comparable to the cooling in the X-ray range.
Keywords
Cite
@article{arxiv.1104.2894,
title = {The Mipsgal View of Supernova Remnants in the Galactic Plane},
author = {D. Pinheiro Goncalves and A. Noriega-Crespo and R. Paladini and P. G. Martin and S. J. Carey},
journal= {arXiv preprint arXiv:1104.2894},
year = {2015}
}
Comments
Accepted for publication in the Astronomical Journal (42 pages, 45 figures)