Revised reaction rates for the H-burning of O-17 and the oxygen isotopic abundances in red giants

Details Revised reaction rates for the H-burning of O-17 and the oxygen isotopic abundances in red giants Revised reaction rates for the H-burning of O-17 and the oxygen isotopic abundances in red giants

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...240...85l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 240, no. 1, Dec. 1990, p. 85-92.

Astronomy and Astrophysics

Astrophysics

68

Abundance, Hydrogen, Oxygen 17, Reaction Kinetics, Red Giant Stars, Oxygen Isotopes, Stellar Composition, Stellar Mass, Stellar Models

Scientific paper

Results of new measurements for the O-17 (p, alpha) and O-17 (p, gamma) reaction rates are presented; they are found to be substantially larger than previously thought, indicating a much larger destruction of O-17 during H-burning in stars. These results are used in up-to-date stellar evolution models to study the oxygen isotopic abundances in red giant stars of high (15 solar) and intermediate (2 solar) mass. Comparison to observational data allows then some constraints to be put on the depth of convective-envelope penetration during the first dredge-up phase.

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