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• W3100865890 startingPage "74" @default.
• W3100865890 abstract "In a recent study, Armstrong et al. presented an eclipsing binary star of about 6.2 h period with transit-like tertiary signals occurring every 204.2 d in the {it Kepler} public data of KIC002856960 and proposed three possible hierarchical structures: (AB)b, (AB)C, and A(BC). We analyzed the {it Kepler} light curve by including a third light source and one starspot on each binary component. The results represent that the close eclipsing pair is in a low-mass eccentric-orbit, detached configuration. Based on 123 eclipse timings calculated from the Wilson-Devinney binary model, a period study of the close binary reveals that the orbital period has experienced a sinusoidal variation with a period and a semi-amplitude of 205$pm$2 d and 0.0021$pm$0.0002 d, respectively. The period variation would be produced by the light-travel-time effect due to a gravitationally-bound third body with a minimum mass of $M_3 sin i_3$=0.76 M$_odot$ in an eccentric orbit of $e_3$=0.61. This is consistent with the presence of third light found in our light-curve solution and the tertiary signal of 204.2 d period most likely arises from the K-type star crossed by the close eclipsing binary. Then, KIC002856960 is a triply eclipsing hierarchical system, A(BC), consisting of a close binary with two M-type dwarfs and a more massive K-type component. The presence of the third star may have played an important role in the formation and evolution of the close pair, which may ultimately evolve into a contact system by angular momentum loss." @default.
• W3100865890 created "2020-11-23" @default.
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• W3100865890 date "2013-01-10" @default.
• W3100865890 modified "2023-09-23" @default.
• W3100865890 title "THE TRIPLY ECLIPSING HIERARCHICAL TRIPLE STAR KIC002856960" @default.
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• W3100865890 doi "https://doi.org/10.1088/0004-637x/763/2/74" @default.
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