Observations of X-rays and Thermal Dust Emission from the Supernova Remnant Kes 75

Details Observations of X-rays and Thermal Dust Emission from the Supernova Remnant Kes 75 Observations of X-rays and Thermal Dust Emission from the Supernova Remnant Kes 75

2007-06-13

arxiv.org/abs/0706.1909v1

Astrophys.J.667:219-225,2007

Astronomy and Astrophysics

Astrophysics

7 pages, 2 tables, 4 figures, uses emulateapj. Accepted for publication in ApJ

Scientific paper

10.1086/520496

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 microns 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 M_dust/M_gas ~0.001. 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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