Photometric Analysis and Period Investigation of the EW Type Eclipsing Binary V441 Lac

被引：3
|
作者：
Li, K. [1 ,2 ]
Hu, S. -M. [1 ]
Guo, D. -F. [1 ]
Jiang, Y. -G. [2 ]
Gao, D. -Y. [1 ]
Chen, X. [1 ]
机构：
[1] Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China
[2] Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming, Peoples R China
来源：
JOURNAL OF ASTROPHYSICS AND ASTRONOMY | 2016年 / 37卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Stars: binaries: close; stars: binaries: eclipsing; stars: individual: V441 Lac; URSAE MAJORIS SYSTEMS; LIGHT CURVES; CONTACT; STARS; DEEP; EVOLUTION; COMPONENT; CATALOG; CANCRI; CYGNI;
D O I：
10.1007/s12036-016-9392-y
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Four color light curves of the EW type eclipsing binary V441 Lac were presented and analyzed by the W-D code. It is found that V441 Lac is an extremely low mass ratio (q = 0.093 +/- 0.001) semi-detached binary with the less massive secondary component filling the inner Roche lobe. Two dark spots on the primary component were introduced to explain the asymmetric light curves. By analyzing all times of light minimum, we determined that the orbital period of V441 Lac is continuously increasing at a rate of dP/dt = 5.874(+/- 0.007) x 10(-7) d yr(-1). The semi-detached Algol type configuration of V441 Lac is possibly formed by a contact configuration destroyed shallow contact binary due to mass transfer from the less massive component to the more massive one predicted by the thermal relaxation oscillation theory.
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页数：11
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