X-ray haloes around supernova remnants

Computer Science

Scientific paper

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Bremsstrahlung, Halos, Interstellar Matter, Supernova Remnants, Synchrotron Radiation, X Rays, Cosmic Rays, Mach Number, Magnetohydrodynamic Waves

Scientific paper

Recent observations of the Cas A supernova remnant have shown X-ray emissions not only from the interior, but also from a fainter "halo" extending beyond what is normally regarded as the outer boundary, or shock front. The authors suggest that this may be due to the diffusion of energetic, charged particles out of the remnant giving rise to precursor structure of the type predicted by the theory of diffusive shock acceleration. If this is the case we are seeing thermal emission from ambient gas heated by compression and wave dissipation.

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