Variable Stars in the Field of the Open Cluster NGC2204

TL;DR

This study identifies five new variable stars in the open cluster NGC 2204, including eclipsing binaries and a foreground low-mass binary, providing light curves and color-magnitude diagrams to aid understanding of stellar evolution.

Contribution

First detailed variable star survey in NGC 2204, discovering five new variables and providing comprehensive light curves and diagrams.

Findings

Four variables are eclipsing binaries.

One variable is a foreground low-mass binary.

The study offers detailed light curves and finder charts.

Abstract

We present the results of a variable stars search in the field of the old open cluster NGC 2204. Five new variables were found, four of them being eclipsing binaries. The sample includes a detached binary located at the turnoff, a W UMa - type system, and an interesting detached low-mass binary with a period of 0.45d which, however, is a foreground object. We provide V-light curves and finder charts for all variables together with color-magnitude diagrams of the cluster. For four variables incomplete I-light curves are also provided.