Light element abundances in F stars and the chemical evolution of the galactic disk

Details Light element abundances in F stars and the chemical evolution of the galactic disk Light element abundances in F stars and the chemical evolution of the galactic disk

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984msngr..38...33e&link_type=abstract

ESO Messenger (ISSN 0722-6691), Dec. 1984, p. 33-38.

Physics

14

Abundance, Chemical Evolution, Dwarf Stars, F Stars, Light Elements, Milky Way Galaxy, Stellar Evolution, Spectral Line Width, Stellar Spectrophotometry, Thermodynamic Equilibrium, Ubv Spectra

Scientific paper

A project for investigation of the evolution of the chemical elements in the galactic disk, and in particular of the elements in the third and fourth period of the periodic table, is presented. Chemical abundances of F dwarfs of different ages and of different overall metal abundance are used for this purpose. Preliminary results for 15 stars are reported; they indicate abundance ratios of O, Mg, Si, Ca and Ti relative to iron that are systematically greater than the solar ratio for stars with Fe/H lower than -0.5, and with the excess increasing with decreasing Fe/H and decreasing atomic number. An odd-even effect for the sequence Na, Mg, Al, Si is found for the metal-poor disk stars.

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