(1) Dept. of Astronomy and Space Sciences, Ankara University Faculty of Science, TR-06100 Tandoğan, Ankara, Turkey;(2) Faculty of Science, Dept. of Astronomy and Space Sciences, İstanbul University, TR-34452 üniversite, İstanbul, Turkey
Abstract:
A significant number of close binaries are known to be members of physically bound triple or multiple star systems. The O – C analysis technique which is based on the minima times of an eclipsing binary can reveal the light-time effect due to the presence of gravitationally bound and generally unseen close component(s) in the system. In this study we present shortly the O – C analysis results based on the light-time effect possibilities for two of the eclipsing binaries observationally followed by our group; TZ Boo and CF Tau.