Author:
Zhang Bin,Qian Sheng-Bang,Wang Jing-Jing,Zhi Qi-Jun,Dong Ai-Jun,Xie Wei,Zhu Li-Ying,Jiang Lin-Qiao
Abstract
Abstract
First multi-wavelength photometric light curves (LCs) of the short-period eclipsing binary (EB) 1SWASP J034439.97+030425.5 (hereafter J0344) are presented and analyzed by using the 2013 version of the Wilson-Devinney (W-D) code. To explain the asymmetric LCs of J0344, a cool star-spot on the less massive component was employed. The photometric solutions suggest that J0344 is a W-subtype shallow contact EB with a contact degree of f = 4.9% ± 3.0% and a mass ratio of q = 2.456 ± 0.013. Moreover, an obvious third light was detected in our analysis. We calculated the average luminosity contribution of the third light to the total light, and that value reaches up to 49.78%. Based on the O − C method, the variations of the orbital period were studied for the first time. Our O − C diagram reveals a secular decrease superimposed on a cyclic oscillation. The orbital period decreases at a rate of dP/dt = −6.07 × 10−7 d yr−1, which can be explained by the mass transfer from the more massive component to the less massive one. Besides, its O − C diagram also shows a cyclic oscillation with an amplitude of 0.0030 d and a period about 7.08 yr, which can be explained by the presence of a third body with a minimum mass of M
3min = 0.15 ± 0.02 M
⊙. The third component may play an important role in the formation and evolution of J0344 by drawing angular momentum from the central system.
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
8 articles.
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