Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...236..895n&link_type=abstract
Astrophysical Journal, Part 1, vol. 236, Mar. 15, 1980, p. 895-898. Research supported by the Statens Naturvidenskabelige Forsk
Astronomy and Astrophysics
Astrophysics
43
Abundance, Aluminum 26, Magnesium Isotopes, Nuclear Fusion, Red Giant Stars, Stellar Evolution, Isotope Effect, Late Stars, Meteoritic Composition, Solar System, Supergiant Stars
Scientific paper
Simplified 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.
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