Metallicity Calibration and Photometric Parallax Estimation: I. UBV photometry

TL;DR

This paper develops calibrations for metallicity and photometric parallax of F and G dwarf stars using UBV photometry, achieving high accuracy in estimates based on a sample of 168 stars.

Contribution

It introduces new calibration methods for metallicity and parallax specifically for F and G dwarf stars using UBV photometry, with demonstrated high precision.

Findings

Metallicity residuals have a standard deviation of 0.134 dex.

Photometric parallax residuals have a standard deviation of 0.174 mag.

Calibrations show minimal mean residuals, indicating high accuracy.

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. $\langle\Delta[Fe/H]_{res}\rangle=0$ and $\sigma=0.134$ dex, and $\langle\Delta (M_V)_{res}\rangle=0$ and $\sigma=0.174$ mag, respectively, which indicate accurate metallicity and photometric parallax estimations.