Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pasp..101..101s&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 101, Jan. 1989, p. 101-106.
Astronomy and Astrophysics
Astronomy
1
Abundance, Barium, Metallic Stars, Stellar Spectra, Strontium, Ground State, Red Giant Stars, Spectral Resolution
Scientific paper
HD 41596 and HD 36650 are two faint, Southern-Hemisphere marginal Ba II stars that are reported in the Michigan Spectral Catalogue to have unusually weak Sr II 4077-A line strengths compared to the Ba II 4554-A line. An analysis of higher resolution spectra confirms the classification for HD 41596, but the case for HD 36650 is not strong. Although an abundance determination is not practical with the material, the line-strength ratio of these two ground-state doublets indicates a barium to strontium abundance ratio greater than unity. This could be produced by the s-process mechanism in a single, large neutron exposure but not by an exponential distribution of exposures.
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