Mixing for Ejected Material in Supernova Remnant Cas A


Yasuhide Matsuo, Masa-aki Hashimoto, Akira Dohi and Kenzo Arai

Recent observations of Cas A suggest that the element distributions for silicon (Si) and iron (Fe) are very peculiar: Fe locates in front of Si. We investigate the formation of the remnant of Cas A and hydrodynamical calculations are performed from the beginning of explosion to the present stage. It is found that the Rayleigh-Taylor instability is developed from the boundary between hydrogen and helium layers. The instability between Si and Fe layers is not grown enough to induce the observed matter mixing if only the mass loss is included during the red super giant stage.


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