Constraints on the Progenitor of Cassiopeia A

  title={Constraints on the Progenitor of Cassiopeia A},
  author={Patrick A. Young and Chris L. Fryer and Aimee L. Hungerford and David C. Arnett and Gabriel Rockefeller and Francis X. Timmes and Benedict F. Voit and Casey A. Meakin and Kristoffer A. Eriksen Los Alamos Natl. Lab. and Steward Observatory and University of Arizona and Physics Dept.},
  journal={The Astrophysical Journal},
  pages={891 - 900}
We compare a suite of three-dimensional explosion calculations and stellar models incorporating advanced physics with observational constraints on the progenitor of Cassiopeia A. We consider binary and single stars from 16 to 40 M☉ with a range of explosion energies and geometries. The parameter space allowed by observations of nitrogen-rich high-velocity ejecta, ejecta mass, compact remnant mass, and 44Ti and 56Ni abundances individually and as an ensemble is considered. A progenitor of 15-25… 

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