Beryllium and post-main-sequence evolution.
Abstract
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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1976
- DOI:
- 10.1086/154850
- Bibcode:
- 1976ApJ...210..475B
- Keywords:
-
- Abundance;
- Beryllium;
- Main Sequence Stars;
- Stellar Atmospheres;
- Stellar Evolution;
- Stellar Models;
- Hertzsprung-Russell Diagram;
- Stellar Spectra;
- Ubv Spectra;
- Astrophysics