Light-element abundances in 20 F and G dwarfs

Details Light-element abundances in 20 F and G dwarfs Light-element abundances in 20 F and G dwarfs

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...290..289t&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 290, March 1, 1985, p. 289-295. Research supported by the Robert A. Welch F

Astronomy and Astrophysics

Astrophysics

60

Abundance, Dwarf Stars, F Stars, G Stars, Infrared Spectra, Light Elements, Near Infrared Radiation, Stellar Composition, Atomic Spectra, High Resolution, Line Spectra, Nuclear Fusion, Spectral Line Width, Spectrum Analysis, Stellar Structure, Temperature Dependence

Scientific paper

Red and near-IR spectral lines of the Galaxy are analyzed to extract Na, Mg, Al, Si and Ca abundances. The data were obtained using a 2.7 m telescope fitted with a coudespectrograph and a Reticon photodiode array tuned to the 6160, 6350, 6570, 6696, 7860 and 8740 wavelengths of 20 F and G dwarfs in the disk and halo. The abundances were then compared to recorded Fe abundances, particularly the forbidden Fe/H ratio. Even numbered atomic number elemental abundances followed the ratio down to values of -0.4, then increased relative to Fe in the transition from disk to halo. The abundances of odd-numbered elements more closely tracked the abundance of Mg in the disk, and experienced a fairly abrupt decrease in the disk-halo transition.

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