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Al-26 from red giantsSimplified models of thermally pulsing red giants are investigated, with particular emphasis on predicting the extent to which nuclear processing at the base of the convective envelope in conjunction with processing in the thermally unstable He shell can synthesize Al-26 (tau/1/2/ = 7.2 x 10 to the 5th yr). Values of Al-26/Al-27 of about 0.5-1, with Al-27/Al-27(solar) of about 1-2, are predicted in some cases. It is pointed out that such results can lead to isotope shifts in the absorption lines of AlH and AlO, which should be observationally identifiable in some late-type supergiants. The possible connection with the anomalous Mg-26 content (assigned to the decay of Al-26) detected in some meteorites and the connection with formation of the solar system are also touched on.
Document ID
19800047753
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Norgaard, H.
(Chicago, University Chicago, Ill.; Nordisk Institut for Teoretisk Atomfysik; Copenhagen, University, Copenhagen, Denmark)
Date Acquired
August 10, 2013
Publication Date
March 15, 1980
Publication Information
Publication: Astrophysical Journal
Subject Category
Astrophysics
Accession Number
80A31923
Funding Number(s)
CONTRACT_GRANT: NSG-7212
Distribution Limits
Public
Copyright
Other

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