Polarimetric Approach Towards Membership Probability of Open Star Cluster NGC 2345

TL;DR

This paper introduces a polarimetric method to determine star membership probabilities in the open cluster NGC 2345, providing an alternative approach that aligns with previous proper motion results.

Contribution

The study presents a novel application of linear polarimetric observations to estimate star membership probabilities in an open cluster.

Findings

Polarimetric membership probabilities agree with proper motion estimates.

The method effectively distinguishes cluster members based on polarization.

Polarimetry offers a complementary tool for cluster membership analysis.

Abstract

Using the linear polarimetric observations, we present a method to derive the membership probability of stars in cluster NGC 2345. The polarimetric observations of cluster NGC 2345 are performed using the instrument ARIES IMaging POLarimeter (AIMPOL) mounted as a backend of the 104-cm telescope of ARIES. Members of the cluster should exhibit comparable polarization since they are located nearly at the same distance. This concept is used to extract the membership probability of known member stars of cluster NGC 2345. The membership probability estimated using the polarimetric data for cluster NGC 2345 agrees with the membership probability derived from the proper motion method in the previous studies.