The first Charge Coupled Device photometry of the poorly studied clusters Teutsch 126 & Czernik 11

Abstract

In this study, we determined the astrophysical parameters of the poorly studied clusters Teutsch 126 and Czernik 11. We used the Visual Red Charge Coupled Device pass-bands that were carried down to a limiting magnitude of V = 20 mag. The stars of the clusters were observed utilizing the Newtonian focus of a 74-inch telescope at the Kottamia Astronomical Observatory in Egypt. Cross-matched data from the new global database Gaia DR2 were used in the present study. The radial density distributions, core and tidal radii, color-magnitude diagrams, geometrical distances, and ages and color excesses were presented for Teutsch 126 and Czernik 11. The luminosity and mass functions, the total mass and the relaxation time of the two clusters were estimated as well.