Hydrodynamical Simulations of Highly-Neutronized Ejecta in the Near-Chandrasekhar Mass Supernova Remnant 3C 397

X-ray spectra from the JAXA satellite Suzaku showed type Ia supernova remnant (SNR) 3C 397 rich in iron-group elements (IGEs), including iron, nickel, manganese, and chromium. A recent observation of SNR 3C 397 from the ESA satellite XMM-Newton shows clumps of neutron-rich species, such as chromium and titanium, in the outer regions of the ejecta. To understand the nature of the progenitor white dwarf and the explosion mechanism involved in the SNR 3C 397, we created a suite of two-dimensional hydrodynamical models of the near-MCh white dwarf with variations of multiple parameters such as explosion mechanism, central density, and composition of the white dwarf.

In this talk, I will present our findings from the detailed nucleosynthetic yields of IGEs, including the spatial distribution of neutron-rich species such as chromium and the analysis of the associated clumps rich in Cr/Fe abundance ratios with the comparisons to newly observed results of 3C 397.