Lunar-based Ultraviolet Telescope study of the well-known Algol-type binary TWDra

	Lunar-based Ultraviolet Telescope study of the well-known Algol-type binary TWDra
	Liao WP(廖文萍)1,2 ; Qian SB(钱声帮)1,2,3 ; Zejda, Miloslav 4; Zhu LY(朱俐颖)1,2,3 ; Li LJ(李临甲)1,2
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2016-06-01
卷号	16 期号:6
关键词	stars: binaries: close stars: binaries: eclipsing stars: individual (TW Draco)
ISSN号	1674-4527
通讯作者	Liao, WP
产权排序	第一完成单位
英文摘要	By using the Lunar-based Ultraviolet Telescope (LUT) from 2014 December 2 to December 4, the first near-UV light curve of the well-known Algol-type binary TW Dra is reported, which is analyzed with the 2013 version of the W-D code. Our solutions confirmed that TW Dra is a semi-detached binary system where the secondary component fills its Roche lobe. The mass ratio and a high inclination are obtained (q = 0.47, i = 86.68 degrees). Based on 589 available data spanning more than one century, the complex period changes are studied. Secular increase and three cyclical changes are found in the corresponding orbital period analysis. The secular increase changes reveal mass transfer from the secondary component to the primary one at a rate of 6.8 x 10(-7) M(circle dot)yr(-1). One large cyclical change of 116.04 yr may be caused by disturbance of visual component ADS 9706B orbiting TW Dra (ADS 9706A), while the other two cyclical changes with shorter periods of 22.47 and 37.27 yr can be explained as the result of two circumbinary companions that are orbiting around TW Dra, where the two companions are in simple 3 : 5 orbit-rotation resonances. TW Dra itself is a basic binary in a possible sextuple system with the configuration (1 + 1) + (1 + 1) + (1 + 1), which further suggests that multiplicity may be a fairly common phenomenon in close binary systems.
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]	STAR LIGHT CURVES ; ECLIPSING BINARIES ; TW-DRACONIS ; VELOCITY CURVES ; ORBITAL-PERIOD ; COMPONENTS ; DRA
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/1674-4527/16/6/094/meta
语种	英语
WOS记录号	WOS:000377524600009
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9606]
专题	云南天文台_双星与变星研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China 2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China 3.University of Chinese Academy of Sciences, Beijing 100049, China 4.Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlářská 2, CZ-611 37 Brno, Czech Republic
推荐引用方式 GB/T 7714	Liao WP,Qian SB,Zejda, Miloslav,et al. Lunar-based Ultraviolet Telescope study of the well-known Algol-type binary TWDra[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(6).
APA	Liao WP,Qian SB,Zejda, Miloslav,Zhu LY,&Li LJ.(2016).Lunar-based Ultraviolet Telescope study of the well-known Algol-type binary TWDra.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(6).
MLA	Liao WP,et al."Lunar-based Ultraviolet Telescope study of the well-known Algol-type binary TWDra".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.6(2016).