Colors and ionization equilibria in K-dwarfs. II - Implications for the lower main sequence

Details Colors and ionization equilibria in K-dwarfs. II - Implications for the lower main sequence Colors and ionization equilibria in K-dwarfs. II - Implications for the lower main sequence

Nov 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....44....9p&link_type=abstract

Astronomy and Astrophysics, vol. 44, no. 1, Nov. 1975, p. 9-16. Translation.

Astronomy and Astrophysics

Astrophysics

10

Dwarf Stars, Ionization Coefficients, K Stars, Late Stars, Line Spectra, Stellar Spectrophotometry, Atmospheric Ionization, Chemical Composition, Main Sequence Stars, Stellar Atmospheres, Stellar Luminosity, Stellar Mass, Velocity Distribution

Scientific paper

A previous study by Perrin et al., (1975) elucidated the cause of disagreement in the ionization equilibrium found by Oinas (1974) for K-dwarfs. This paper presents a detailed analysis of three other K-dwarfs. Two of the observed stars, 36 Oph A and B are young population I stars and form with 36 Oph C a triple system. The third star, HD 191408, belongs, on the contrary, to the old disk population. No significant differences in chemical composition between the three stars have been found. Masses have been estimated for a small sample of twelve K-dwarfs.

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