Astrophysical Parameters of the Open Cluster Berkeley 6

TL;DR

This paper determines the astrophysical parameters of the open cluster Berkeley 6 using Gaia DR3 data, identifying members and estimating its distance, age, and reddening.

Contribution

It provides the first detailed analysis of Berkeley 6's parameters using Gaia DR3 astrometric, photometric, and spectroscopic data, including membership determination.

Findings

119 probable cluster members identified.

Distance of 2625±337 parsecs determined.

Age estimated at 350±50 million years.

Abstract

In this study, the structural and basic astrophysical parameters of the poorly studied open cluster Berkeley 6 are calculated. Analyses of the cluster are carried out using the third photometric, spectroscopic, and astrometric data release of Gaia (Gaia DR3). The membership probabilities of stars located in the direction of the cluster region are calculated by considering their astrometric data. Thus, we identified 119 physical members for Berkeley 6. The colour excess, distance, and age of the cluster are determined simultaneously on the colour-magnitude diagram. We fitted solar metallicity PARSEC isochrones to the colour-magnitude diagram by considering the most probable member stars and obtained $E(G_{\rm BP}-G_{\rm RP})$ colour excess as 0.918$\pm$0.145 mag. The distance and age of the cluster are determined as $d=2625\pm337$ pc and $t=350\pm50$ Myr, respectively.