出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We examine observed heavy element abundances in the Cassiopeia A supernova remnant as a
constraint on the nature of the Cas A supernova. We compare bulk abundances from 1D and 3D
explosion models and spatial distribution of elements in 3D models with those derived from Xray
observations. We also examine the cospatial production of 26Al with other species. We find
that the most reliable indicator of the presence of 26Al in unmixed ejecta is a very low S/Si ratio
(∼ 0.05). Production of N in O/S/Si-rich regions is also indicative. The biologically important
element P is produced at its highest abundance in the same regions. Proxies should be detectable
in supernova ejecta with high spatial resolution multiwavelength observations.
