Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26as..108..441m&link_type=abstract
Astronomy and Astrophysics Suppl. 108, 441-446 (1994)
Astronomy and Astrophysics
Astrophysics
15
Stars: Abundances, Techniques: Photometric
Scientific paper
To improve the calibration of the indices of the Stroemgren photometric system in terms of high-resolution spectroscopic [Fe/H] values, new algorithms have been tested. The statistical method of stepwise linear regression has been successfully applied to the data sample of F-type stars with the aim of defining the refined calibration equations 'spectroscopic [Fe/H] versus the (b-y), m_1_, and c_1_ photometric indices, and their combinations'. To enlarge the sample of calibration stars, we have added to the heterogeneous spectroscopic [Fe/H] catalogue of Cayrel de Strobel et al. (1992) data from other sources and estimated systematic and accidental errors to some of those sources. Application of the data to further improvement of photometric calibration is discussed.
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