Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...364..657h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 364, Dec. 1, 1990, p. 657-662. Research supported by SERC.
Astronomy and Astrophysics
Astrophysics
13
Abundance, B Stars, Early Stars, Nonequilibrium Thermodynamics, Solar Neighborhood, Stellar Atmospheres, Stellar Spectra, Absorption Spectra, Argon, Atmospheric Models, Line Spectra, Radiative Transfer, Signal To Noise Ratios
Scientific paper
Non-LTE radiative transfer calculations for argon are presented for models with effective temperatures in the range 17,500-30,000 K and a logarithmic argon abundance of 6.50 on the scale log (H) = 12. These are used to analyze high-resolution and signal-to-noise observations of weak Ar II lines in the spectra of B-type stars. A mean argon abundance of 6.50 + or - 0.05 dex is found, providing a reliable estimate of the current cosmic argon abundance in the solar neighborhood.
Brown Paul J. F.
Dufton Philip L.
Holmgren D. E.
Keenan Francis P.
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