Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...210..475b&link_type=abstract
Astrophysical Journal, vol. 210, Dec. 1, 1976, pt. 1, p. 475-480. Research supported by the Research Corp.
Astronomy and Astrophysics
Astrophysics
28
Abundance, Beryllium, Main Sequence Stars, Stellar Atmospheres, Stellar Evolution, Stellar Models, Hertzsprung-Russell Diagram, Stellar Spectra, Ubv Spectra
Scientific paper
The abundance of Be has been determined in 11 subgiants of spectral types F-K from spectrograms of 6.7 A/mm dispersion and a model atmosphere analysis by using atmospheres of Carbon and Gingerich. The amount of convective dilution of Be during post-main-sequence evolution has been determined for 1, 1.25, and 1.5 solar mass stars. Several of the stars fall into the region of expected Be dilution; they all show reduced amounts of Be, close to the calculated diluted values. When the observed Be values are corrected for the effects of dilution and restored to their main-sequence values, they are in good agreement with the average found by Boesgaard for the main-sequence Be abundance.
Boesgaard Ann Merchant
Chesley S. E.
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