Observations of X-rays and thermal dust emission from the supernova remnant KES 75

Timothy D. Morton, Patrick Slane, Kazimierz J. Borkowski, Stephen P. Reynolds, David J. Helfand, B. M. Gaensler, John P. Hughes

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32 Scopus citations


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 some-what 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.

Original languageEnglish (US)
Pages (from-to)219-225
Number of pages7
JournalAstrophysical Journal
Issue number1 I
StatePublished - 2007

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Dust, extinction
  • ISM: individual (SNR G29.7-0.3)
  • Supernova remnants
  • X-rays: ISM


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