THE SUPERNOVA REMNANT 3C 397: PHYSICS OF SNe Ia IN SINGLE-DEGENERATE SCENARIO

We propose joint NuSTARXMM observations of 3C 397, a Type Ia supernova remnant(SNR) likely originating from a nearChandrasekharmass white dwarf in asingledegenerate progenitor system. Suzaku observations of this SNR detectedstrong emission of the Fepeak elements (Cr, Mn, Fe, Ni) and indicatedremarkably high mass ratios of Mn/Fe and Ni/Fe. Under the auspices of thisproposal, we will reveal the spatial distribution of these elements to constrainthe properties of the progenitor and the supernova explosion mechanism. NuSTARis particularly suitable for this study, thanks to the highest sensitivity to NiKalpha emission at 7.6 keV among currently operating Xray missions. XMMNewtonprovides a perfect complement to NuSTAR, by enabling clear detection of Cr and Mn lines. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]