An abundance analysis of the cool barium stars.
Abstract
High dispersion Coudeand IR spectra for seven Ba stars have been used in an analysis relying on published model atmospheres to determine iron-peak elemental abundances, heavy element s- and r-process abundances, and C, N, and O abundances. For three of the stars, C-12/C-13 ratios are also determined. The stars considered exhibit enhanced N abundances, slight depletions of O, and approximately solar C abundances. These results are suggested to follow from the contamination of a normal K-giant atmosphere by additional C, mainly in the form of C-12.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- March 1984
- Bibcode:
- 1984A&A...132..326S
- Keywords:
-
- Abundance;
- Barium;
- Metallic Stars;
- Stellar Atmospheres;
- Stellar Spectra;
- Carbon;
- Chemical Composition;
- Giant Stars;
- Infrared Spectra;
- K Stars;
- Lithium;
- Neutron Cross Sections;
- Nitrogen;
- Oxygen;
- Astrophysics