Dynamical Features of Open Star Cluster: DOLIDZE 14

TL;DR

This study analyzes the structural and dynamical properties of open star cluster DOLIDZE 14, revealing its age, mass distribution, and internal stellar motions through photometric and kinematic data.

Contribution

It provides new measurements of the cluster's radius, distance modulus, age indicators, mass-function slope, and evidence of mass segregation and weak gravitational binding.

Findings

Cluster radius is 9.8 arcmin based on the first RDP plateau.

Mass-function slope differs from Salpeter's value.

Evidence of mass segregation and high proper motion indicating weak binding.

Abstract

The radial density profile (RDP) of cluster DOLIDZE 14 provides the radius of 9.8 arcmin, it is based on consideration of first plateau region of RDP. This value is less than the radius which comes through consideration of the second plateau region. The stars, which are inside of the cluster radius, are used to estimate the distance-modulus and E(I-R) by fitting theoretical isochrone on the colour-magnitude diagram (CMD). The best fitted stellar isochrone of solar matellacity provides these values as 11.15 mag and 0.25 mag, respectively. These results are used to estimate the mass-function slope of the cluster, which comes to be different that of Salpeter-Value. The enhancement of brighter stars does not found within the cluster region which indicates its old age. The Mass-Segregation phenomena of cluster is found between massive and lighter stars but not found in fainter stars, having magnitude greater than 15 mag in I-band. The relaxation-time is very little in the comparison of its age. The mean proper motion of cluster's radial zones is found to be high in the comparison of field region (12.77-15.18 arcmin). This is indicative of weak-gravitational bond among the stars of the cluster.