Evidence for a Close-in Tertiary Orbiting around the Algol-type System HZ Dra with Tidal Splitting and Spots Activities

We report a cyclic variation of the O − C diagram with a semiamplitude of 0.0033 days and a period of 1.05 yr for the pulsating eclipsing binary HZ Dra. The cyclic variation can be explained by the light travel-time effect via the presence of a close-in third body orbiting around HZ Dra in an ellipt...

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Veröffentlicht in:	The Astrophysical journal 2024-12, Vol.977 (1), p.3
Hauptverfasser:	Li, Ping, Liao, Wen-Ping, Qian, Sheng-Bang, Li, Lin-Jia, Sun, Qi-Bin, Shi, Xiang-Dong, Matekov, Azizbek, Zeng, Qi-Huan, Deng, Zhao-Long, Fang, Xiao-Hui
Format:	Artikel
Sprache:	eng
Schlagworte:	Circular orbits Close binary stars Eclipsing binary minima timing method Eclipsing binary stars Elliptical orbits Fine structure Frequency analysis Frequency variation Lagrangian equilibrium points Pulsating variable stars Thermal cycling Travel time Variable stars
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