PUBLICATIONS OF THE ASTRONOMICAL OBSERVATORY OF BELGRADE104, Page 91-98, https://doi.org/10.69646/aob104p091
PROCEEDINGS of the XX Serbian Astronomical Conference, Belgrade, October 16 - 20, 2023, Edited by Jelena Petrović, Dušan Marčeta and Ana Lalović
Published by: Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

Abstract. In close binary systems with magnetic activity in at least one of their com- ponents, distinctive features can be observed in their light curves. This study presents a photometric analysis of several binary systems with at least one active component. We start with a preliminary study of the O’Connell effect in short orbital period binaries identified in the Kepler binary catalog. This phenomenon in the light curves could be attributed to the migration of spots on the surface of the active star, making them key objects for studying the differences between the magnetic fields of isolated stars and those in binary systems. In addition, a comprehensive photometric analysis could reveal unexpected behaviour in the orbital light curves, related to magnetic activity. Recently, we have analysed the light curves of Double Periodic Variables binary systems and found cyclic changes in their orbital light curves, possibly as a consequence of a magnetic dynamo operating in the donor star. These results open up new perspectives for exploring the consequences of stellar magnetism in interacting binaries.