Photometric Study and Search for Pulsations in RZ Dra and EG Cep

TL;DR

This study conducts CCD photometry and analysis of RZ Dra and EG Cep, revealing their semidetached binary nature, searching for stellar pulsations, and investigating potential additional components through period analysis.

Contribution

It provides detailed photometric analysis of RZ Dra and EG Cep, including pulsation search and period analysis, using updated modeling tools.

Findings

Both systems are semidetached with the secondary filling its Roche lobe.

No significant pulsations detected in the primary components.

Period analysis suggests possible additional components.

Abstract

This paper presents CCD observations of the Algol-type eclipsing binaries RZ Dra and EG Cep. The light curves have been analyzed with the PHOEBE software and Wilson-Devinney code (2003 version). A detailed photometric analysis, based on these observations, is presented for both binarity and pulsation. The results indicate semidetached systems where the secondary component fills its Roche lobe. After the subtraction of the theoretical light curve, a frequency analysis was performed in order to check for pulsations of the primary component of each system. Moreover, a period analysis was performed for each case in order to search for additional components around the eclipsing pairs.