On the sodium excess in the atmospheres of yellow supergiants

Details On the sodium excess in the atmospheres of yellow supergiants On the sodium excess in the atmospheres of yellow supergiants

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...379..729p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 379, Oct. 1, 1991, p. 729-733. Research supported by EEC.

Astronomy and Astrophysics

Astrophysics

14

Abundance, Nuclear Astrophysics, Sodium, Stellar Atmospheres, Stellar Evolution, Supergiant Stars, Neon, Nuclear Fusion, Stellar Composition, Stellar Interiors, Stellar Models

Scientific paper

In order to explain quantitatively the reported Na excess at the surface of some yellow giant stars, the possibility is explored of an enhanced rate of the Ne-20(p, gamma) reaction. Detailed stellar nucleosynthesis calculations show that an enhancement factor f about 10 in H-burning temperatures is required to explain the observations. A careful analysis of current understanding of that reaction shows that such an enhancement is unlikely.

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