A new method for the determination of [Fe/H] in RR Lyrae stars.

Details A new method for the determination of [Fe/H] in RR Lyrae stars. A new method for the determination of [Fe/H] in RR Lyrae stars.

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...293l..57k&link_type=abstract

Astronomy and Astrophysics 293L, L57-L60 (1995)

Astronomy and Astrophysics

Astrophysics

17

Stars: Variables, Stars: Oscillation, Stars: Horizontal-Branch, Stars: Abundances

Scientific paper

The Fourier parameters of the V light curves of the field RRab stars are used to fit their [Fe/H]. The method is based on the assumption that the observed light curves depend only on a few physical parameters, including the chemical composition. We give two formulae which estimate the observed [Fe/H] with an accuracy of 0.23-0.18dex. Each of these expressions consists of a second order polynom of 2-4 Fourier parameters and the period. The method is a powerful tool in estimating the metallicity when spectroscopic data are not available.

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