New Scenario of plasma evolution in IC 443

Abstract

Most of young and middle-aged supernova remnants (SNRs) exhibit an ionizing plasma (IP), an ionizing process following a shock heated SNR gas. On the other hand, significant fractions of SNRs exhibit a recombining plasma (RP). The origin and the mechanisms of the RP, however, are not yet well understood. This paper proposes a new model that the RP is followed after the IP process taken at the first epoch of the SNR evolution. Using the high quality and wide band (0.6-10 keV) spectrum of IC 443, we nicely fitted with a model of two RP (two-RP model) plus a power law (PL) with an Fe I Kalpha line component. The ionization temperature in one RP monotonously increases from Ne-Ca, while that in the other RP shows a drastic increase from Cr-Ni. Origin and mechanism of the two-RP and PL with an Fe I Kalpha line components are possibly due to a different evolution of two plasmas and ionization by the low-energy cosmic ray.

arXiv commentAccepted for publication in PASJ

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Cited by in corpus (8)

• ALMA CO Observations of the Mixed-Morphology Supernova Remnant W49B: Efficient Production of Recombining Plasma and Hadronic Gamma-rays via Shock-Cloud Interactions
• Neutral iron line in the supernova remnant IC 443 and implications for MeV cosmic rays
• A systematic comparison of ionization temperatures between ionizing and recombining plasmas in supernova remnants
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• X-ray emission from the mixed-morphology supernova remnant HB 9
• Discovery of recombining plasma associated with the candidate supernova remnant G189.6+3.3 with Suzaku
• Initial state of the recombining plasma in supernova remnant W 28
• Investigation of the Physical Origin of Overionized Recombining Plasma in the Supernova Remnant IC 443 with XMM-Newton