Search results for " a centrally peaked X-ray morphology"

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Overionization in X-ray spectra: a new paradigm for Mixed-Morphology SNRs

2011

Mixed-morphology SNRs are characterized by a shell-like radio emission, a centrally peaked X-ray morphology, and by interaction with molecular clouds. Many models have been proposed to explain these peculiar remnants, but their physical origin is still unclear. The recent discovery of over-ionized (i. e. recombining) ejecta in 3 mixed-morphology SNRs has dramatically challenged all the previous models and opened up new, unexpected scenarios. I review the main properties of these remnants and their peculiar X-ray spectral properties. I also discuss the hydrodynamic model developed to explain the presence of over-ionized ejecta in W49B and present a list of open issues that still need to be c…

High Energy Astrophysical Phenomena (astro-ph.HE)Astrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesAstrophysics - High Energy Astrophysical PhenomenaMixed-morphology SNRs are characterized by a shell-like radio emission a centrally peaked X-ray morphology and by interaction with molecular clouds. Many models have been proposed to explain these peculiar remnants but their physical origin is still unclear. The recent discovery of overionized (i. e. recombining) ejecta in 3 mixed-morphology SNRs has dramatically challenged all the previous models and opened up new unexpected scenarios. I review the main properties of these remnants and their peculiar X-ray spectral properties. I also discuss the hydrodynamic model developed to explain the presence of overionized ejecta in W49B and present a list of open issues that still need to be clarified.Astrophysics::Galaxy Astrophysics
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