PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. VII. V404 AND WITH MAGNETIC ACTIVITY

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	PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. VII. V404 AND WITH MAGNETIC ACTIVITY
	Zhang, Li-Yun1,2,3 ; Yang, Yuan-Gui; Pi, Qing-Feng 1,2,3; Zhu, Zhongzhong 1,2,3
刊名	ASTRONOMICAL JOURNAL
	2014-03
卷号	147 期号:3
关键词	binaries: eclipsing stars: late-type starspots
ISSN号	0004-6256
通讯作者	Zhang, LY (reprint author), Guizhou Univ, Coll Sci, Dept Phys, Guiyang 550025, Peoples R China.
英文摘要	We present new CCD light curves of the short-period Algol-type eclipsing binary V404 And obtained in 2009-2011. The time-resolving multiple BVRI color light curves of the year 2011 with full phase coverage were analyzed simultaneously using the latest Wilson-Devinney program. We concluded that the configuration of two starspots on the primary is the most reliable explanation for the light curve distortions observed in 2011. Based on the new photometric solution, we further applied the spot model to explain the other light curves, including the previously published R-band light curves. We revealed that the starspots changed on a long timescale in terms of the spot parameters and the differences between Max. I and Max. II. Moreover, the O - C diagram spanning about 15 yr shows an upward parabola, which indicates a secular increase in the orbital period of V404 And. The orbital period increases at a rate of dP/dt = 5.3(0.3) x 10(-7) days yr(-1), which might be interpreted by the angular momentum exchange via magnetic activity.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	ORBITAL PERIOD MODULATION ; ANGULAR-MOMENTUM LOSS ; EVOLUTIONARY STATUS ; CORONAE-BOREALIS ; CLOSE BINARIES ; RT ANDROMEDAE ; MASS-TRANSFER ; STAR LIGHT ; CATALOG ; HERCULIS
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/0004-6256/147/3/66/meta
语种	英语
WOS记录号	WOS:000331125600021
公开日期	2016-06-01
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9436]
专题	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 and NAOC-GZU Center for Astronomy, Guizhou University, Guiyang 550025, P.R. China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, P.R. China 3.School of Physics and Electronic Information, Huaibei Normal University, Huaibei 235000 Anhui Province, P.R. China
推荐引用方式 GB/T 7714	Zhang, Li-Yun,Yang, Yuan-Gui,Pi, Qing-Feng,et al. PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. VII. V404 AND WITH MAGNETIC ACTIVITY[J]. ASTRONOMICAL JOURNAL,2014,147(3).
APA	Zhang, Li-Yun,Yang, Yuan-Gui,Pi, Qing-Feng,&Zhu, Zhongzhong.(2014).PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. VII. V404 AND WITH MAGNETIC ACTIVITY.ASTRONOMICAL JOURNAL,147(3).
MLA	Zhang, Li-Yun,et al."PHOTOMETRIC PROPERTIES FOR SELECTED ALGOL-TYPE BINARIES. VII. V404 AND WITH MAGNETIC ACTIVITY".ASTRONOMICAL JOURNAL 147.3(2014).