Nucleosynthetic constraints on the progenitor of cassiopeia A: ²⁶Al and O isotopes compared to SMOW

Our recent 3D simulation of a supernova explosion to constrain the progenitor of Cas A has enabled us to gain new insight into burning processes at work. Of special interest in this poster are the isotopes ²⁶Al, ¹⁶O, ¹⁷O, and ¹⁸O. These isotopes are important in the formation history of our solar system, and help constrain its environment at the time of formation. A favored model is the addition of supernova ejecta to the forming solar system, which presumably changed the isotopic abundances of a range of isotopes (like those mentioned above). In this poster we investigate how the relative abundances of the oxygen isotopes in the solar system is affected by the injection of supernova material, given that this injection produces the expected change in ²⁶Al/ ²⁷Al. We also investigate whether the bulk composition or specific zones of the supernova are more appropriate, and what the determining factors are. Lastly, we look at differences between 1D and the 3D simulation in this matter.