Synchrotron X-rays from Evolving Supernova Remnant Shocks

Mathematics – Logic

Scientific paper

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Scientific paper

X-ray observations of the remnant of the supernova of SN 1006 AD can be well described by models invoking synchrotron radiation from electrons accelerated in the remnant shock wave to energies of order 100 TeV or higher. This process should be taking place in other remnants as well. I describe evolutionary models for the synchrotron component of X-rays to be expected from supernova remnants of various types and ages, and the constraints on shock microphysics and astrophysical parameters that are provided by observations of young supernova remnants whose X-ray spectra are not obviously dominated by a nonthermal component. The models predict that for relatively young remnants, the X-ray spectra should become dominated by the nonthermal contribution at high enough X-ray energies. I present morphological as well as spectral predictions from the models, and describe the expected changes with time. The models also have implications for the acceleration of cosmic-ray ions.

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