Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...146..249c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 146, no. 2, May 1985, p. 249-259.
Astronomy and Astrophysics
Astrophysics
211
Abundance, Dwarf Stars, Heavy Elements, Star Clusters, Stellar Composition, Stellar Spectra, Data Reduction, H Alpha Line, Iron, Signal To Noise Ratios, Spectral Line Width, Spectrum Analysis, Stellar Activity, Stellar Atmospheres, Stellar Temperature
Scientific paper
An analysis is conducted of high S/N ratio coude spectra for 12 Hyades dwarfs, together with solar spectra for comparison, in order to obtain accurate abundances for iron and other metals in the Hyades. Temperatures relative to the sun are derived from H-alpha wing profiles or broadband colors, and cluster stars are selected to bracket the solar temperature. Equivalent widths of metal lines are obtained by means of a profile fitting technique that accounts for blends, and many of the measured lines are noted to be sufficiently weak for uncertainties in microturbulence to be insignificant. The resulting iron abundances are anomalously low for two Hyades dwarfs, evidently due to high levels of chromospheric activity. Abundances are also obtained for 10 other elements.
Campbell Bel
Cayrel Roger
Cayrel de Strobel G.
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