CAOSP abstracts, Volume: 55, No.: 3, year: 2025

Author(s): Şenavcı, H.V.; Bohlender, D.; Bahar, E.; Gu, S.; Özavcı, İ.; Yılmaz, M.; Yorulmaz, E.B.; Latković, O.; Čeki, A.
Journal: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 55, no. 3, p. 295-300.
Date: 04/2025
Title: Discovery of a third body around semi-detached binary V527 Dra through eclipse timing and radial velocity variations
Keyword(s): Stars: individual: V527 Dra, (Stars:) binaries (including multiple): close, Techniques: radial velocities
Pages: 295 -- 300
DOI: https://doi.org/10.31577/caosp.2025.55.3.295
NASA ADS Abstract Service: 2025CoSka..55c.295S
Citation:
License: This work is licensed under a Creative Commons Attribution 4.0 International License

Abstract: The mid-eclipse times obtained using TESS data for the semi-detached binary V527 Dra show cyclic variations attributed to the presence of an additional body. Additionally, the broadening profiles (BFs) of V527 Dra, obtained from spectroscopic data gathered between 2020 and 2024, reveal a third peak with varying radial velocities over time, further indicating the presence of a third body. Therefore, in this study, using the radial velocity variations of the third component and the eclipse timing variations from the TESS data, we were able to constrain the orbital parameters of the third component.