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Explosive nucleosynthesis in massive stars - Comparison with the Cassiopeia A fast-moving knotsIf the ejecta of a Type II supernova do not undergo extensive mixing, then, based on the explosion of current presupernova models, only a small fraction approximately equal to or less than 0.1 solar mass of the mantle of a massive star can yield abundances similar to those observed in the fast-moving knots of Cas A. This is shown to be independent of the detailed structure of the mantle and the supernova energy. Lack of mixing in Cas A is indicated by strong upper limits on the abundance ratios Ne/O, and Fe/O. If this is confirmed by further observations, then either Cas A is not the result of a standard progenitor of approximately equal to or less than 25 solar masses disrupted by a Type II supernova, or the picture of the last stages of stellar evolution in massive stars needs to be modified substantially.
Document ID
19850034816
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Johnston, M. D.
(Space Telescope Science Institute Baltimore, MD, United States)
Yahil, A.
(New York, State University Stony Brook, NY; Nordisk Institut for Teoretisk Atomfysik, Copenhagen, Denmark)
Date Acquired
August 12, 2013
Publication Date
October 15, 1984
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 285
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
85A16967
Funding Number(s)
CONTRACT_GRANT: NAS8-30543
CONTRACT_GRANT: NAS8-27972
CONTRACT_GRANT: DE-AC02-76ER-13001
CONTRACT_GRANT: NSG-7643
Distribution Limits
Public
Copyright
Other

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