The Triply Eclipsing Hierarchical Triple Star KIC002856960

摘要: In a recent study, Armstrong et al. presented an eclipsing binary star of about 6.2 hr period with transit-like tertiary signals occurring every 204.2 days in the Kepler public data KIC002856960 and proposed three possible hierarchical structures: (AB)b, (AB)C, A(BC). We analyzed light curve by including third source one starspot on each component. The results represent that close pair is low-mass eccentric-orbit, detached configuration. Based 123 eclipse timings calculated from Wilson-Devinney model, study reveals orbital has experienced sinusoidal variation semi-amplitude 205 ± 2 days 0.0021 0.0002 days, respectively. would be produced light-travel-time effect due to gravitationally bound body minimum mass M 3sin i 3 = 0.76 ☉ eccentric orbit e 0.61. This consistent presence found our solution signal 204.2 day most likely arises K-type crossed binary. Then, triply system, A(BC), consisting two M-type dwarfs more massive may have played important role formation evolution pair, which ultimately evolve into contact system angular momentum loss.