Other
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...247.1052s&link_type=abstract
Astrophysical Journal, Part 1, vol. 247, Aug. 1, 1981, p. 1052-1062. Research supported by the Robert A. Welch Foundation
Other
80
Abundance, Barium, Giant Stars, Metallic Stars, Nuclear Fusion, Stellar Atmospheres, Astronomical Photography, Atmospheric Models, Carbon, G Stars, K Stars, Line Spectra, Nitrogen, Oxygen, Spectral Line Width, Stellar Spectra, Stellar Temperature
Scientific paper
Carbon, nitrogen, and oxygen abundances are presented for seven mild barium stars and two classical barium stars. The mild barium stars do not show the carbon enhancement typical of the classical Ba II stars. The CNO abundances of the mild barium and normal G and K giants are identical. An s-process enhancement is confirmed for some of the mild barium stars. The marked division in the abundance patterns and the recent discovery of low-mass comparisons to the classical Ba II stars but not the mild barium stars suggest that the two types of barium stars are unrelated. A possible explanation for the mild barium stars is that the abundance of rare s-process elements in the interstellar clouds is not uniform. The mild barium stars were formed in clouds containing an above average abundance of the s-process elements but approximately normal abundances of other elements.
Lambert David L.
Pilachowski Catherine A.
Sneden Chistopher
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