Discovery of Four New Clusters in the Cygnus Cloud

TL;DR

This paper reports the discovery of four new open clusters in the Cygnus Cloud using Gaia DR2 data, and derives their astrophysical parameters through astrometric and photometric analysis.

Contribution

The study introduces four newly identified open clusters in Cygnus and provides their detailed astrophysical parameters, validating the identification method with a known cluster.

Findings

Four new open clusters discovered in Cygnus.

Astrophysical parameters derived for each cluster.

Verification of method with known cluster NGC 7062.

Abstract

We report the discovery of four new open clusters (named as QC 1, QC 2, QC3 and QC 4) in the direction of Cygnus Cloud and select their members based on five astrometric parameters (l, b, \varpi, \mu^*_{\alpha}, \mu_{\delta}) of Gaia DR2. We also derive their astrophysical parameters for each new cluster. Structure parameters are generated by fitting the radial density distribution with King's profile. Using solar metallicity, we performed isochrone-fitting on their purified color-magnitude diagrams (CMDs) to achieve the age of the clusters. The known cluster NGC 7062 at adjacent area is chosen to verify our identification process. The estimated distance, reddening and age of NGC 7062 are in good agreement with the literature.