A Photometric Study of Five Open Clusters in the SDSS

TL;DR

This study analyzes five open clusters using SDSS data, determining their positions, sizes, reddening, distances, and ages through photometric and proper motion analysis, contributing valuable data on their Galactic locations.

Contribution

It provides new measurements of cluster parameters and their Galactic positions, utilizing SDSS photometry and proper motion data for the first time for these clusters.

Findings

Reddenings range from E(B-V)=0.71 to 1.55 mag.

Distances are between 2.0 and 4.4 kpc.

Ages range from 250 Myr to 1 Gyr.

Abstract

We present a photometric study of five open clusters (Czernik 5, Alessi 53, Berkeley 49, Berkeley 84, and Pfleiderer 3) in the Sloan Digital Sky Survey. The position and size of these clusters are determined using the radial number density profiles of the stars, and the member stars of the clusters are selected using the proper motion data in the literature. We estimate the reddening, distance, and age of the clusters based on the isochrone fitting in the color-magnitude diagram. The foreground reddenings for these clusters are estimated to be E(B-V) = 0.71 - 1.55 mag. The distances to these clusters are derived to be 2.0 - 4.4 kpc, and their distances from the Galactic center range from 7.57 kpc to 12.35 kpc. Their ages are in the range from 250 Myr to 1 Gyr. Berkeley 49 and Berkeley 84 are located in the Orion spur, Czernik 5 is in the Perseus arm, and Pfleiderer 3 and Alessi 53 are at beyond the Perseus arm.