Metallicity Calibration and Photometric Parallax Estimation: I. UBV photometry

Abstract

We present metallicity and photometric parallax calibrations for the F and G type dwarfs with photometric, astrometric and spectroscopic data. The sample consists of 168 dwarf stars covering the colour, iron abundance and absolute magnitude intervals $0.30<(B-V{)}_0<0.68$ mag, $-2.0<[Fe/H]<0.4$ dex and $3.4<M_V<6.0$ mag, respectively. The means and standard deviations of the metallicity and absolute magnitude residuals are small, i.e. $⟨\hat{I}”[Fe/H{]}_{res}⟩=0$ and $\ddot{I}ƒ=0.134$ dex, and $⟨\hat{I}”(M_V{)}_{res}⟩=0$ and $\ddot{I}ƒ=0.174$ mag, respectively, which indicate accurate metallicity and photometric parallax estimations.

13 pages, 11 figures and 2 tables, accepted for publication in Astrophysics and Space Science