A search for technetium (Tc II) in barium stars

Details A search for technetium (Tc II) in barium stars A search for technetium (Tc II) in barium stars

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....93.1539l&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 93, June 1987, p. 1539-1541.

Physics

14

Barium, Metallic Stars, Stellar Composition, Stellar Physics, Technetium, Binary Stars, Spectrum Analysis, Stellar Models, Ultraviolet Spectra

Scientific paper

The authors searched without success for the lines of Tc II at 2647.02, 2610.00 and 2543.24 Å in IUE spectra of the barium stars HR 5058, ο Vir, and ζ Cap. The lack of Tc II implies that the observed s-process enhancements were produced more than half a million years ago and supports the suggestion that the spectral peculiarities of barium stars are probably related to the binary nature of the stars.

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