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Title:
A Spitzer Space Telescope Infrared Survey of Supernova Remnants in the Inner Galaxy
Authors:
Reach, William T.; Rho, Jeonghee; Tappe, Achim; Pannuti, Thomas G.; Brogan, Crystal L.; Churchwell, Edward B.; Meade, Marilyn R.; Babler, Brian; Indebetouw, Rémy; Whitney, Barbara A.
Affiliation:
AA(Spitzer Science Infrared Center, California Institute of Technology, Pasadena, CA 91125; ), AB(Spitzer Science Infrared Center, California Institute of Technology, Pasadena, CA 91125; ), AC(Spitzer Science Infrared Center, California Institute of Technology, Pasadena, CA 91125; ), AD(Spitzer Science Infrared Center, California Institute of Technology, Pasadena, CA 91125; ), AE(Institute for Astronomy, University of Hawaii, 640 North A'ohoku Place, Hilo, HI 96720), AF(Department of Astronomy, University of Wisconsin, 475 North Charter Street, Madison, WI 53706), AG(Department of Astronomy, University of Wisconsin, 475 North Charter Street, Madison, WI 53706), AH(Department of Astronomy, University of Wisconsin, 475 North Charter Street, Madison, WI 53706), AI(Astronomy Department, University of Virginia, Charlottesville, VA 22904), AJ(Space Science Institute, 4750 Walnut Street, Boulder, CO 80303)
Publication:
The Astronomical Journal, Volume 131, Issue 3, pp. 1479-1500. (AJ Homepage)
Publication Date:
03/2006
Origin:
UCP
AJ Keywords:
Infrared: ISM, Shock Waves, ISM: Supernova Remnants
DOI:
10.1086/499306
Bibliographic Code:
2006AJ....131.1479R

Abstract

Using Infrared Array Camera (IRAC) images at 3.6, 4.5, 5.8, and 8 μm from the GLIMPSE Legacy science program on the Spitzer Space Telescope, we searched for infrared counterparts to the 95 known supernova remnants that are located within Galactic longitudes 65deg>|l|>10deg and latitudes |b|<1deg. Eighteen infrared counterparts were detected. Many other supernova remnants could have significant infrared emission but are in portions of the Milky Way too confused to allow the separation of bright H II regions and pervasive mid-infrared emission from atomic and molecular clouds along the line of sight. Infrared emission from supernova remnants originates from synchrotron emission, shock-heated dust, atomic fine-structure lines, and molecular lines. The detected remnants are G11.2-0.3, Kes 69, G22.7-0.2, 3C 391, W44, 3C 396, 3C 397, W49B, G54.4-0.3, Kes 17, Kes 20A, RCW 103, G344.7-0.1, G346.6-0.2, CTB 37A, G348.5-0.0, and G349.7+0.2. The infrared colors suggest emission from molecular lines (nine remnants), fine-structure lines (three remnants), polycyclic aromatic hydrocarbons (four remnants), or a combination; some remnants feature multiple colors in different regions. None of the remnants are dominated by synchrotron radiation at mid-infrared wavelengths. The IRAC-detected sample emphasizes remnants interacting with relatively dense gas, for which most of the shock cooling occurs through molecular or ionic lines in the mid-infrared.
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