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Yogesh Chandra Joshi & Alaxender Panchal

Investigation of Orbital Period Changes in Nine Contact Binaries

(Volume 93 - Année 2024 — No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation)
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Abstract

We present the results for orbital period analysis of nine contact binaries (CBs). The photometric data analysed in this work is collected using ARIES 1-m and 1.3-m telescopes as well as many ground and space-based photometric surveys. The precise orbital periods of the binary systems are studied using the long time-baseline of data acquired over the last 12-15 years. The changes in the times of minimum brightness are calculated using (O-C) diagram. Out of these nine CBs, four systems show no change in the orbital period with time while the remaining five systems show non-linear (O-C) variations with time. We derive mass transfer rates for these five CBs which suggests mass is being transferred from secondary to primary components in three systems while it is from primary to secondary components in the other two systems.

Keywords : methods: observational, techniques: photometric, binaries: eclipsing, contact

To cite this article

Yogesh Chandra Joshi & Alaxender Panchal, «Investigation of Orbital Period Changes in Nine Contact Binaries», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 93 - Année 2024, No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation, 351-357 URL : https://popups.ulg.ac.be/0037-9565/index.php?id=11715.

About: Yogesh Chandra Joshi

Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital. Corresponding author: yogesh@aries.res.in

About: Alaxender Panchal

Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital and Department of Physics, DDU Gorakhpur University, Gorakhpur, India