Photometric study of the pulsating, eclipsing binary OO Dra

TL;DR

This study provides a detailed photometric analysis of the eclipsing binary OO Dra, revealing its physical parameters, pulsation modes, and evolutionary status through multi-band observations and frequency analysis.

Contribution

It offers the first photometric solution and physical parameters for OO Dra, identifying pulsation modes and refining the system's orbital characteristics.

Findings

OO Dra is likely a detached binary with a secondary nearly filling its Roche lobe.

Two pulsation modes detected, with the dominant frequency at 41.865 c/d.

Revised orbital period and new ephemeris established.

Abstract

We present a comprehensive photometric study of the pulsating, eclipsing binary OO Dra. Simultaneous B- and V-band photometry of the star was carried out on 14 nights. Revised orbital period and a new ephemeris were derived from the data. The first photometric solution of the binary system and the physical parameters of the component stars are determined. It reveals that OO Dra could be a detached system with the less-massive secondary component nearly filling in its Roche lobe. By subtracting the eclipsing light changes from the data, we obtained the intrinsic pulsating light curves of the hotter and massive primary component. Frequency analysis of the residuals light yields two confident pulsation modes in both B- and V-band data with the dominant frequency detected at 41.865 c/d. A brief discussion concerning the evolutionary status and the pulsation nature of the binary system is finally given.