Erdem A.Budding E.Demircan O.Degirmenci Ö.L.Gülmen Ö.Sezer C.2019-10-272019-10-2720050004-63370004-6337https://doi.org/10.1002/asna.200410356https://hdl.handle.net/11454/22009New light curves and available times of minima of a ß Lyr system EG Cep were analysed to deduce more information on the nature of the system. The main U-shaped (O - C) variation was interpreted in terms of the mass transfer and mass loss in the system. The same variation was also considered as a part of a sinusoidal variation and thus interpreted in terms of a light-time effect due to an unseen component in the system. New B and V light curves were analyzed with different fitting procedures, and there is general agreement that both stars must be very close to each other and to stability limits. A model that fits all the data well has a near main sequence primary and a secondary star that is overflowing matter towards it. This secondary is also reasonably close to main sequence conditions. The configuration thus appears to be a (relatively uncommon) 'Case A' type evolving Algol and raises interesting questions about such interactive evolution and potentially useful tests of theory. © 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.en10.1002/asna.200410356info:eu-repo/semantics/closedAccessBinaries: eclipsingStars: individual (EG Cep)Article3265332337Q3