Orbital Period Change of the Binary System V700 Cyg

Authors

  • Supat Sairattanain Program in General Science, Faculty of Education and Human Development, Sisaket Rajabhat University
  • Torik Hengpiya Regional Observatory for the Public, Songkhla, National Astronomical Research Institute of Thailand (Public Organization)
  • Wiraporn Maithong Department of Physics and General Science, Faculty of Science and Technology, Chiang Mai Rajabhat University

Keywords:

V700 Cyg, O–C diagram, AML

Abstract

This research aims to investigate the orbital period change of the contact binary system V700 Cyg, classified as a W Ursae Majoris (W UMa)-type binary. Observations were carried out using a 0.7-meter reflecting telescope equipped with a CCD sensor and B and V photometric filters at the Regional Observatory for the Public, Songkhla on August 7, 2021. The photometric data obtained were used to construct light curves and determine the times of minimum light, which were then used to generate an O–C diagram. The analysis reveals that the orbital period of V700 Cyg is gradually decreasing, with the change of 9.98 × 10-4 seconds per year. This indicates that the two stellar components are slowly spiraling closer to each other over time. That explained the by the Angular Momentum Loss (AML) evolution theory.

References

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Published

12/26/2025

How to Cite

Sairattanain, S., Hengpiya, T., & Maithong, W. (2025). Orbital Period Change of the Binary System V700 Cyg. Journal of Earth Science, Astronomy and Space, 8(1), 15–24. retrieved from https://ph05.tci-thaijo.org/index.php/JESA/article/view/228

Issue

Vol. 8 No. 1 (2025): Journal of Earth Science, Astronomy and Space

Section

Research Article

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