Observations of interstellar lithium toward Sigma Scorpii, Beta/1/ Scorpii, and 55 Cygni

Details Observations of interstellar lithium toward Sigma Scorpii, Beta/1/ Scorpii, and 55 Cygni Observations of interstellar lithium toward Sigma Scorpii, Beta/1/ Scorpii, and 55 Cygni

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...250..160s&link_type=abstract

Astrophysical Journal, Part 1, vol. 250, Nov. 1, 1981, p. 160-162. Research supported by the Robert A. Welch Foundation.

Astronomy and Astrophysics

Astrophysics

14

Abundance, Interstellar Matter, Light Elements, Lithium, Nuclear Fusion, Stellar Spectra, Carbonaceous Chondrites, Cosmology, Spectrum Analysis

Scientific paper

The 6708 A doublet of interstellar Li I has been observed toward Sigma Sco, Beta(1) Sco, and 55 Cyg with measured equivalent widths of 0.63 + or - 0.10, not greater than 0.20, and 1.63 + or - 0.18 mA, respectively. Neutral and total lithium column densities are calculated and compared with those of potassium, sodium, and hydrogen nuclei. The Li/K ratio is roughly constant toward the six stars with detected insterstellar lithium lines, with a value double that found in Type I carbonaceous chondrites. Comparison with Li/H and Li/Na ratios suggests that all the alkalis are depleted, but the potassium depletion is twice that of lithium. No significant limit can be placed on the Li-6 abundance by these spectra.

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