CCD UBVRI Photometry of the Galactic open clusters: Be~89, Ru~135, and Be~10

TL;DR

This study derives fundamental parameters like reddening, metallicity, age, and distance for three poorly studied open clusters using CCD UBVRI photometry and isochrone fitting across multiple color-magnitude diagrams.

Contribution

It provides new, detailed parameter estimates for Be 89, Ru 135, and Be 10, enhancing understanding of these clusters' properties through comprehensive photometric analysis.

Findings

Distances range from 0.81 to 2.4 kpc.

Ages are approximately 1 to 4 billion years.

Parameters are derived with high precision.

Abstract

The fundamental parameters of reddening, metallicity, age, and distance are presented for the poorly studied open clusters Be~89, Ru~135, and Be~10, derived from their CCD UBVRI photometry. By fitting the appropriate isochrones to the observed sequences of the clusters in five different color--magnitude diagrams, the weighted averages of distance moduli and heliocentric distances ($(V_0$--$M_{V}), d$(kpc)) are $(11\fm90\pm 0\fm06, 2.4\pm 0.06$) for Be~89, $(9\fm58\pm 0\fm07, 0.81\pm 0.03$) for Ru~135, and $(11\fm16\pm 0\fm06, 1.7 \pm 0.05$) for Be~10, and the weighted averages of the ages $(\log(A), A$(Gyr)) are $(9.58\pm 0.06, 3.8\pm 0.6)$ for Be~89, $(9.58\pm 0.06, 3.8\pm 0.7)$ for Ru~135, and $(9.06\pm 0.05, 1.08\pm 0.08)$ for Be~10.