How do we mix supernova ejecta to reproduce isotopic ratios of presolar grains?

Details How do we mix supernova ejecta to reproduce isotopic ratios of presolar grains? How do we mix supernova ejecta to reproduce isotopic ratios of presolar grains?

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006newar..50..600y&link_type=abstract

New Astronomy Reviews, Volume 50, Issue 7-8, p. 600-603.

Astronomy and Astrophysics

Astronomy

26.30.+K, 96.50.Mt, 97.60.Bw

Scientific paper

We investigate the mixing ratios of the supernova mixtures reproducing as many as possible of the 12C/13C, 14N/15N, 26Al/27Al, 29Si/28Si, 30Si/28Si, and 44Ti/48Ti isotopic ratios measured in two presolar grains from supernovae. We consider the mixing of seven layers of supernova ejecta, i.e., the Ni, Si/S, O/Si, O/Ne, C/O or O/C, He/C, and He/N layers. Five isotopic ratios of the grains are reproduced by mixtures at the maximum. The mixtures should mainly contain the He/N layer to reproduce 12C/13C and to be the C/O ratio slightly larger than unity. The Ni layer should be included for the grains with high 44Ti/48Ti ratios. Including too much material from O-rich layers is not appropriate because of their small C/O ratios.

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