New colour transformations for the sloan photometry, and revised metallicity calibration and equations for photometric parallax estimation

Abstract

We evaluated new colour transformations for the Sloan photometry by 224 standards and used them to revise both the equations for photometric parallax estimation and metallicity calibration cited by Karaali et al. ( 2003). This process improves the metallicity and absolute magnitude estimations by [Fe/H] less than or equal to 0.3 dex and M-g1(H) greater than or equal to 0.1 mag respectively. There is a high correlation for metallicities and absolute magnitudes derived for two systems, UBV and Sloan, by means of the revised calibrations.