Photometric study of the short-period eclipsing binary V441 Lac

被引：3
|
作者：
Wang, Daimei [1 ,2 ,3 ]
Zhang, Liyun [1 ,2 ,3 ]
Han, Xianming L. [4 ]
Agerer, Franz [5 ]
Pi, Qingfeng [1 ,2 ,3 ]
Wang, Shuai [1 ,2 ,3 ]
机构：
[1] Guizhou Univ, Coll Sci, Dept Phys, 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
[5] Bundesdeutsche Arbeitsgemeinschaft Veranderl Ster, D-12169 Berlin, Germany
来源：
NEW ASTRONOMY | 2015年 / 36卷
基金：
中国国家自然科学基金;
关键词：
Stars: binaries: eclipsing; Stars: individual V441 Lac; Stars: period variation; CLOSE-BINARY; MASS-TRANSFER; LIGHT CURVES; STAR LIGHT; CONTACT; SYSTEMS; CATALOG; TAURI; CYGNI; MON;
D O I：
10.1016/j.newast.2014.09.013
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the first multi-color VRI CCD light curves of a short-period eclipsing binary star v441 Lac in this paper. We obtained our light curves on Oct. 4 and 8, 2013 at Xinglong station of National Astronomical Observatories, China. We updated the ephemeris of V441 Lac based on three new minima derived by our new observational data together with previously available light curve minima. By fitting the O-C (observed minus calculated) values of the minima, we found that the orbital period of V441 Lac exhibits an increasing trend of P = 5.67(0.35) x 10(-7) days/year, which might be explained by mass transfer from the secondary component to the primary one, or angular momentum exchange by magnetic activities. We also obtained the photometric orbital parameters with the Wilson & Devinney program. Our final result shows that the V441 Lac system is a semi-detached binary with the secondary component filling roche lobe. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：32 / 36
页数：5
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