YNAO OpenIR  > 双星与变星研究组
DI Hya: A Near-contact Binary with a Close-in Companion
Liao WP(廖文萍)1,2; Qian SB(钱声帮)1,2,3; Li LJ(李临甲)1,2; Zhou X(周肖)1,2; Zhao EG(赵二刚)1,2,3; Zhang J(张嘉)1,2
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
2017-03-01
Volume129Issue:973
DOI10.1088/1538-3873/aa5869
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars:) Binaries (Including Multiple): Close (Stars:) Binaries: Eclipsing Stars: Evolution Stars:Individual
Abstract

DI Hya is a short-period eclipsing binary and its classification has been discussed by several authors. New four-color light curves were obtained and have been analyzed together with the data from Manimanis & Niarchos simultaneously using the W-D method. The binary turns out to be a near-contact system where both components are filling or nearly filling their critical Roche lobes. The secondary has a temperature difference of Delta T similar or equal to-2800 K. The orbital period investigation has been ignored so far. All charge-coupled devices (CCD)and pe times of light minima are used for period analysis, showing that a cyclic variation with a short period of 1.46 years and a small semi-amplitude of 0.0034 days and a downward parabolic variation with a rate of P = -2.98(+/- 0.32)x 10(-7)days yr(-1). The short period and small semi-amplitude cyclic variations were analyzed for the light-travel time effect via the presence of a close-in tertiary binary with an orbital separation shorter than 1.57(+/- 0.31) au. Orbital properties of this close-in companion should provide valuable information on the formation of this short-period binary and stellar dynamical interaction. The downward parabolic change may be caused by angular momentum loss via an enhanced stellar wind of the more evolved secondary star.

Funding ProjectNational Natural Science Foundation of China[11403095] ; National Natural Science Foundation of China[11325315] ; National Natural Science Foundation of China[U1631108] ; Yunnan Natural Science Foundation[2014FB187] ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of Chinese Academy of Sciences[XDB09010202]
Funding OrganizationNational Natural Science Foundation of China[11403095, 11325315, U1631108] ; Yunnan Natural Science Foundation[2014FB187] ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of Chinese Academy of Sciences[XDB09010202]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-6280
URL查看原文
Archive Date2017-10-16
WOS IDWOS:000423186500001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordORBITAL PERIOD CHANGES ; ANGULAR-MOMENTUM LOSS ; ALGOL-TYPE BINARIES ; VELOCITY CURVES ; POSSIBLE MASS ; LIGHT
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/11905
Collection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
Corresponding AuthorLiao WP(廖文萍)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, Republic of 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, Yuquan Road 19#, Shijingshan Block, 100049 Beijing, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liao WP,Qian SB,Li LJ,et al. DI Hya: A Near-contact Binary with a Close-in Companion[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2017,129(973).
APA Liao WP,Qian SB,Li LJ,Zhou X,Zhao EG,&Zhang J.(2017).DI Hya: A Near-contact Binary with a Close-in Companion.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,129(973).
MLA Liao WP,et al."DI Hya: A Near-contact Binary with a Close-in Companion".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 129.973(2017).
Files in This Item:
File Name/Size DocType Version Access License
DI Hya_ A Near-conta(827KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Liao WP(廖文萍)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Li LJ(李临甲)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liao WP(廖文萍)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Li LJ(李临甲)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liao WP(廖文萍)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Li LJ(李临甲)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: DI Hya_ A Near-contact Binary with a Close-in Companion.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.