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arxiv: 0711.3534 · v1 · submitted 2007-11-22 · 🌌 astro-ph

Stroemgren metallicity calibration: the m1, b-y relation

A. Calamida , G. Bono (OAR/INAF) , P. B. Stetson (HIA/NRC) , L. M. Freyhammer (Univ. Lancashire) , S. Cassisi (OACTe/INAF) , F. Grundahl (Aarhus Univ.) , A. Pietrinferni (OACTe/INAF) , M. Hilker
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F. Primas (ESO) T. Richtler (Univ. Concepcion) M. Romaniello (ESO) R. Buonanno (Univ. Rome) F. Caputo M. Castellani C. E. Corsi I. Ferraro G. Iannicola L. Pulone (OAR/INAF)
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keywords calibrationclustercolormetallicityrelationstroemgrenabundancesaccuracy
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We performed a new calibration of the Stroemgren metallicity index m1 based on the b-y color of cluster red giant stars. The current Metallicity-Index-Color relation is not linear in the color range 0.40 < b-y < 1.0, but provides iron abundances of cluster and field red giants with an accuracy of ~ 0.25 dex.

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