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Title:
Observations of X-Rays and Thermal Dust Emission from the Supernova Remnant Kes 75
Authors:
Morton, Timothy D.; Slane, Patrick; Borkowski, Kazimierz J.; Reynolds, Stephen P.; Helfand, David J.; Gaensler, B. M.; Hughes, John P.
Affiliation:
AA(Harvard College, Cambridge, MA 02138.), AB(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138.), AC(Department of Physics, North Carolina State University, Box 8202, Raleigh, NC 27695-8202.), AD(Department of Physics, North Carolina State University, Box 8202, Raleigh, NC 27695-8202.), AE(Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, New York, NY 10027.), AF(School of Physics A29, University of Sydney, NSW 2006, Australia.; Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138.), AG(Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Road, Piscataway, NJ 08854.)
Publication:
The Astrophysical Journal, Volume 667, Issue 1, pp. 219-225. (ApJ Homepage)
Publication Date:
09/2007
Origin:
UCP
ApJ Keywords:
ISM: Dust, Extinction, ISM: individual (SNR G29.7-0.3), ISM: Supernova Remnants, X-Rays: ISM
DOI:
10.1086/520496
Bibliographic Code:
2007ApJ...667..219M

Abstract

We present Spitzer Space Telescope and Chandra X-Ray Observatory observations of the composite Galactic supernova remnant Kes 75 (G29.7-0.3). We use the detected flux at 24 μm and hot gas parameters from fitting spectra from new, deep X-ray observations to constrain models of dust emission, obtaining a dust-to-gas mass ratio Mdust/Mgas~10-3. We find that a two-component thermal model, nominally representing shocked swept-up interstellar or circumstellar material and reverse-shocked ejecta, adequately fits the X-ray spectrum, albeit with somewhat high implied densities for both components. We surmise that this model implies a Wolf-Rayet progenitor for the remnant. We also present infrared flux upper limits for the central pulsar wind nebula.
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