First Photometric Investigations of the Solar-type Binary FV CVn in Multiple Systems

First Photometric Investigations of the Solar-type Binary FV CVn in Multiple Systems
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多系统中太阳型二元 FV CVn 的首次光度研究

DOI:
10.1088/1538-3873/aaeae2
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发表时间:
2018-12
影响因子:
3.5
通讯作者:
T. Sarotsakulchai
T. Sarotsakulchai
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
W.-P. Liao;T. Sarotsakulchai

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FV CVn是一颗太阳型(G7)食双星,其分析至今被忽略。我们从2014年1月到2018年5月观察了它。第一光度和轨道周期的调查在这里,结合光谱观测获得的大天区多目标光纤光谱望远镜(LAMOST)。目前的初步解表明,FV CVn是一个新的W型接触双星,质量比q = M2/M1 = 2.44(±0.20),温度差△ T = T2 − T1 <$− 315 K。轨道周期研究表明,FV CVn存在A = 0.0184(±0.0034)天,P3 = 17.65(±0.076)年的周期变化。这种周期性变化被分析为光旅行时间效应(LTTE),通过第三个机构的存在,最小质量为M3 min = 0.73(±0.018)M,和轨道半长轴短于5.27(±1.62)Au。这与系统中存在大量的第三光是一致的。测光结果表明,第三体对多重系统总光的贡献分别为Rc的26.4(±6.3)%和Ic的29.0(±5.9)%。这一附加分量可能对中心密近双星的起源和演化起着重要的作用。未来需要新的径向速度来检查绝对参数的准确性。
FV CVn is a solar-type (G7) eclipsing binary whose analysis has so far been ignored. We observed it from 2014 January to 2018 May. The first photometric and orbital period investigation are presented here, combined with spectroscopic observations obtained by the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST). The current preliminary solutions show that FV CVn is a new W-subtype contact binary with a mass ratio of q = M2/M1 = 2.44(±0.20) and a temperature difference of △ T = T 2 − T 1 ≃ − 315 K. The orbital period investigation suggests that a cyclic variation of A = 0.0184(±0.0034) days and P3 = 17.65(±0.076) years exists in FV CVn. This cyclic variation is analyzed for the light-travel-time effect (LTTE) via the presence of a third body with a minimum mass of M3min = 0.73(±0.018) M⊙, and an orbital semimajor axis shorter than 5.27(±1.62) au. This is in agreement with the presence of a large quantity of a third light in the system. Photometric solutions suggest that the third body contributes about 26.4(±6.3)% in Rc, and 29.0(±5.9)% in Ic to the total light of the multiple system. The additional component may play an important role in the origin and evolution of central close binary. New radial velocities are needed in the future to check the accuracy of the absolute parameters.
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