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LUT REVEALS AN ALGOL-TYPE ECLIPSING BINARY WITH THREE ADDITIONAL STELLAR COMPANIONS IN A MULTIPLE SYSTEM
Zhu LY(朱俐颖)1,2,3; Zhou X(周肖)1,2,3; Hu, J. -Y.4; Qian SB(钱声帮)1,2,3; Li LJ(李临甲)1,2; Liao WP(廖文萍)1,2; Tian XM(田晓慢)1,2,3; Wang ZH(王志华)1,2,3; Zhu, LY
发表期刊ASTRONOMICAL JOURNAL
2016-04-01
卷号151期号:4
DOI10.3847/0004-6256/151/4/107
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Evolution Stars: Individual (V548 Cygni)
摘要A complete light curve of the neglected eclipsing binary Algol V548 Cygni in the UV band was obtained with the Lunar-based Ultraviolet Telescope in 2014 May. Photometric solutions are obtained using the Wilson-Devinney method. It is found that solutions with and without third light are quite different. The mass ratio without third light is determined to be q = 0.307, while that derived with third light is q = 0.606. It is shown that V548 Cygni is a semi-detached binary where the secondary component is filling the critical Roche lobe. An analysis of all available eclipse times suggests that there are three cyclic variations in the O-C diagram that are interpreted by the light travel-time effect via the presence of three additional stellar companions. This is in agreement with the presence of a large quantity of third light in the system. The masses of these companions are estimated as m sin i' similar to 1.09, 0.20, and 0.52 M-circle dot. They are orbiting the central binary with orbital periods of about 5.5, 23.3, and 69.9 years, i.e., in 1: 4: 12 resonance orbit. Their orbital separations are about 4.5, 13.2, and 26.4 au, respectively. Our photometric solutions suggest that they contribute about 32.4% to the total light of the multiple system. No obvious long-term changes in the orbital period were found, indicating that the contributions of the mass transfer and the mass loss due to magnetic braking to the period variations are comparable. The detection of three possible additional stellar components orbiting a typical Algol in a multiple system make V548 Cygni a very interesting binary to study in the future.
项目资助者Chinese Natural Science Foundation(11133007, 11325315, 11573063) ; Key Research Program of the Chinese Academy of Sciences(KGZD-EW-603) ; Science Foundation of Yunnan Province(2013FB084) ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09010202)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2016-05-11
WOS记录号WOS:000375609100020
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]LIGHT CURVES ; ULTRAVIOLET TELESCOPE ; CONTACT BINARIES ; SHALLOW CONTACT ; STARS ; COMPONENTS ; SEARCH
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9590
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
通讯作者Zhu, LY
作者单位1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming, P. R. China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, P. R. China
3.University of the Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, P. R. China
4.National Astronomical Observatories, Chinese Academy of Sciences, 100012 Beijing, P. R. China
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Zhu LY,Zhou X,Hu, J. -Y.,et al. LUT REVEALS AN ALGOL-TYPE ECLIPSING BINARY WITH THREE ADDITIONAL STELLAR COMPANIONS IN A MULTIPLE SYSTEM[J]. ASTRONOMICAL JOURNAL,2016,151(4).
APA Zhu LY.,Zhou X.,Hu, J. -Y..,Qian SB.,Li LJ.,...&Zhu, LY.(2016).LUT REVEALS AN ALGOL-TYPE ECLIPSING BINARY WITH THREE ADDITIONAL STELLAR COMPANIONS IN A MULTIPLE SYSTEM.ASTRONOMICAL JOURNAL,151(4).
MLA Zhu LY,et al."LUT REVEALS AN ALGOL-TYPE ECLIPSING BINARY WITH THREE ADDITIONAL STELLAR COMPANIONS IN A MULTIPLE SYSTEM".ASTRONOMICAL JOURNAL 151.4(2016).
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