CAOSP abstracts, Volume: 54, No.: 2, year: 2024

Author(s): Gajdoš, P.; Parimucha, Š.; Kamenec, M.
Journal: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 54, no. 2, p. 194-197.
Date: 02/2024
Title: Spotted eclipsing binary KIC 7023917 with δ-Scuti pulsations
Keyword(s): eclipsing binaries, pulsations, starspots
Pages: 194 -- 197
DOI: https://doi.org/10.31577/caosp.2024.54.2.194
NASA ADS Abstract Service: 2024CoSka..54b.194G
Citation:
License: This work is licensed under a Creative Commons Attribution 4.0 International License

Abstract: Eclipsing binary KIC 7023917 is one of nearly three thousand other binaries in the well-known Kepler Eclipsing Binary Catalog. However, it has some uncommon features. We focused on this system because we detected fast anti-correlated changes on the O-C diagram which could suggest the presence of apsidal motion. However, these changes are very fast for apsidal motion and the orbit of this binary is circular. Detailed analysis of the Kepler and TESS light curves reveals deformation of the light curve by short-periodic pulsations and the O'Connell effect caused by stellar spot(s). Here, we present our initial study of this system and a possible explanation of the observed O-C diagram.