The multi-band CCD photometric investigation of short-period eclipsing binary V1044 Her

被引：6
|
作者：
Lu, Hongpeng [1 ,2 ,3 ]
Zhang, Liyun [1 ,2 ,3 ]
Han, Xianming L. [4 ]
Pi, Qingfeng [1 ,2 ,3 ]
Wang, Daimei [1 ,2 ,3 ]
机构：
[1] Guizhou Univ, Dept Phys, Coll Sci, Guiyang 550025, Peoples R China
[2] Guizhou Univ, NAOC GZU Sponsored Ctr Astron Res, Guiyang 550025, Peoples R China
[3] Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R China
[4] Butler Univ, Dept Phys & Astron, Indianapolis, IN 46208 USA
来源：
NEW ASTRONOMY | 2016年 / 48卷
基金：
中国国家自然科学基金;
关键词：
Stars:Binaries:Eclipsing; Stars:individual V1044 Her; Stars period variation; ORBITAL-PERIOD; LIGHT-CURVE; STAR LIGHT; CONTACT; SYSTEM; MODULATION; SPOT;
D O I：
10.1016/j.newast.2016.04.006
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present new CCD photometric observations of V1044 Her obtained on May 22, 23 and 24, 2015. From our data, we derived five new light curve minimum times. Combining our new results with previously available CCD light minimum times, we derived an updated ephemeris and discovered that the period of this binary system exhibits an oscillation. The cyclic variation may be caused by the light-time effect via the presence of a third body or magnetic activity cycle. We calculated the corresponding period of the third body to be 14.1 +/- 1.4 years or magnetic cycle to be 12.2 +/- 0.7 years. We analyzed our new asymmetric light curves to obtain photometric solutions and starspot parameters using the Wilson and Devinney program. The final results show that V1044 Her is a contact binary system with a degree of contact factor f = 3.220(+/- 0.002)%. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：58 / 65
页数：8
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