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The first multi-color photometric study of the short-period contact eclipsing binary GK Aqr

文献类型：期刊论文

作者Zhang, LY1,2; Pi, QF1,2; Han, XML3; Li, TA1,2; Zhang XL(张西亮)4; Sang, HY5; Wang, DM1,2; Wang, S1,2
刊名NEW ASTRONOMY
出版日期2015-07
卷号38页码:50-54
关键词Stars: binaries: eclipsing Stars: period variation Stars: individual GK Aqr
ISSN号1384-1076
产权排序第四完成单位
通讯作者Zhang, LY (reprint author), Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R China.
英文摘要We made the first VRI CCD light curves of the short-period contact eclipsing binary GM Aqr, which was observed on October 5 and 8, 2013 at Xinglong station of National Astronomical Observatories, China. The ephemeris of GK Aqr was calculated based on our two newly obtained minima and the minima that other observers obtained previously. We discovered that the orbital period of GK Aqr exhibits an increasing trend of P = 2.8(0.1) x 10(-7) days/year by means of fitting the O-C values of the minima. This phenomenon might be explained by mass transfer from the primary (less massive) component to the secondary (more massive) one. With the updated Wilson & Devinney program, we obtained the photometric orbital parameters for the first time. Using our parameters, we also successfully explained the light curve obtained from the All Sky Automated Survey data. In the end, we concluded that GK Aqr is a near contact binary with a low contact factor of 5.2%. As the mass transfer continues, GK Aqr could become a contact system and evolve into an over-contact system. (C) 2015 Elsevier B.V. All rights reserved.
WOS标题词Science & Technology ; Physical Sciences
学科主题Astronomy & Astrophysics
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
关键词[WOS]VARIABLE-STARS ; LIGHT CURVES ; CATALOG
收录类别SCI
原文出处http://www.sciencedirect.com/science/article/pii/S1384107615000160
语种英语
WOS记录号WOS:000351979500006
源URL[http://ir.ynao.ac.cn/handle/114a53/5463]  
专题云南天文台_丽江天文观测站（南方基地）
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.College of Science/Department of Physics & NAOC-GZU-Sponsored Center for Astronomy Research, Guizhou University, Guiyang 550025, PR China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, PR China
3.Dept. of Physics and Astronomy, Butler University, Indianapolis, IN 46208, USA
4.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, PR China
5.School of Mathematics Science, Liaocheng University, Liaocheng 252059, PR China
推荐引用方式
GB/T 7714		 Zhang, LY,Pi, QF,Han, XML,et al. The first multi-color photometric study of the short-period contact eclipsing binary GK Aqr[J]. NEW ASTRONOMY,2015,38:50-54.
APA Zhang, LY.,Pi, QF.,Han, XML.,Li, TA.,Zhang XL.,...&Wang, S.(2015).The first multi-color photometric study of the short-period contact eclipsing binary GK Aqr.NEW ASTRONOMY,38,50-54.
MLA Zhang, LY,et al."The first multi-color photometric study of the short-period contact eclipsing binary GK Aqr".NEW ASTRONOMY 38(2015):50-54.

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