An Extensive Photometric Investigation of the W UMa System DK Cyg

TL;DR

This study re-examines the W UMa binary system DK Cyg by analyzing all available photometric data, updating its period behavior, and exploring its evolutionary status through light curve analysis and theoretical models.

Contribution

It provides a comprehensive re-analysis of DK Cyg's period changes and evolutionary status using extensive photometric data and updated models.

Findings

Significant period increase of 12.590x10^-11 day/cycle.

Updated system period and ephemeris.

Light curve analysis and evolutionary modeling results.

Abstract

DK Cyg (P = 0.4707) is a W Ursae Majoris type eclipsing binary system that undergoes complete eclipses. All the published photoelectric data have been collected and utilized to re-examine and update the period behavior of the system. A significant period increase with rate of 12.590x10-11 day/cycle was calculated. New period and ephemeris has been calculated for the system. A long term photometric solution study was performed and a light curve elements were calculated. We investigated the evolutionary status of the system using theoretical evolutionary models.