Effect of Blue Component Stars in Parameters of NGC 6866

TL;DR

This study investigates how blue component stars influence the derived parameters of the open star cluster NGC 6866, highlighting the importance of blue stars in understanding cluster structure and evolution.

Contribution

It introduces a photometric method to categorize stars into blue and red groups and examines their impact on cluster parameter estimation, emphasizing the role of blue stars.

Findings

Blue component stars significantly affect cluster parameter estimates.

The core radius of NGC 6866 is determined as 5.22+/-0.29 arcmin.

Mass segregation is observed within the cluster.

Abstract

The open star clusters (OSC) are important tracers for understanding the Galactic evolution. The parametric study of these astronomical-objects is crucial task due to the appearing sequence of the members of OSC. These members are defined through the various approaches such as photometric, statistical, kinematics etc. In the present paper, we have been using the photometric colours of the identified stars for categorized them into the blue and red component groups and identification of these groups is possible through (B-V) vs V colour magnitude diagram (CMD). Furthermore, the influence/effect of these groups is also examined in the estimation of cluster parameters. The stellar enhancement of cluster NGC 6866 is found through the blue-component-stars (BCS) and the linear solution of best fitted values of King Models of the radial-densityprofile (RDP) gives the core radius as 5.22+/-0.29 arcmin. The good agreement of present estimated parameters of the cluster with the literature seems to be an effective evidence to consider BCS as the true representative of the cluster. The stellar distribution of the cluster shows continuous phenomena of the mass segregation. An effect of the incompleteness of photometric data is related to the mass-function slope values, which is found to be -3.80+/-0.11 and also shows the incremental nature with the incompleteness.