Chemical composition of the galactic disk

Details Chemical composition of the galactic disk Chemical composition of the galactic disk

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980azh....57...53m&link_type=abstract

Astronomicheskii Zhurnal, vol. 57, no. 1, 1980, p. 53-64. In Russian.

Astronomy and Astrophysics

Astronomy

4

Chemical Composition, Galactic Evolution, Galactic Structure, Main Sequence Stars, Milky Way Galaxy, Stellar Structure, Abundance, Astronomical Photometry, Chemical Evolution, Dwarf Stars, F Stars, G Stars, K Stars, Kinematics, Star Distribution, Ubv Spectra, Ultraviolet Radiation

Scientific paper

Metallicity indices deltaO.6, DeltaR-1(U-B), and delta(m1)(beta) have been calculated for eight samples of main-sequence disk stars. Indices deltaO.6 and Delta(U-B) have been calibrated to the metal abundance (Fe/H) for the spectral types F, G, and K separately. It is shown that the actual metal abundance distribution among the disk stars is essentially discrete. The UBV and RI data for the F- and K-dwarfs imply that the metallicity of the sun coincides with that of the Hyades, whereas the G-dwarf data yield the known smaller metallicity of the sun with respect to the Hyades. The results are discussed with reference to the chemical evolution of the Galaxy.

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