YNAO OpenIR  > 双星与变星研究组
New Period Investigation of Algol-like Near-Contact Binary EG Cephei
Zhu LY(朱俐颖)1,2; Qian SB(钱声帮)1,2; Liao WP(廖文萍)1,3; Miloslav, Z4; Zdenek, M4; Ying, ZL (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2009
Volume61Issue:3Pages:529-533
DOI10.1093/pasj/61.3.529
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars: Binaries: Eclipsing Stars: Evolution Stars: Individual (Eg Cephei)
AbstractThe Algol-like Near Contact Binary EG Cephei was observed in 2008 October. One new observed time of the secondary minimum was derived in B V(IR)(c) bands. It turns out that the times of minima at longer wavelengths occur earlier than the shorter ones. All of the available eclipse times, including 735 epochs, spanning more than 100 years were analyzed. A period oscillation with a period of 35.8 (+/- 0.1) yr and an amplitude of about 0.0037(+/- 0.0002)d was found, while undergoing a secular increase at a rate of dP/dt = 3.4 x 10(-8)(+/- 0.1) d yr(-1). This continuous period increase may be caused by mass transfer from the secondary component to the primary one on a thermal timescale, which is consistent with the Algol-like semi-detached configuration of EG Cep. Combining with the spectroscopic and photometric results, we derived a conservative mass-transfer rate of this target, dM/dt = 3.0 (+/- 0.1) x 10(-8) M(circle dot) yr(-1). The oscillation part of the period variation may be the result of a light-time effect due to the existence of a coplanar additional body with a mass of M(3) = 0.11 M(circle dot), and a corresponding radius of a(3) = 14 AU. The presumed third body may play an important role in the evolution of this system.
Funding OrganizationSpecial Foundation of President of The Chinese Academy of Sciences and West Light Foundation ; Chinese Academy of Sciences, Yunnan Natural Science Foundation [2008CD157] ; Chinese Nature Science Foundation [10778707] ; National Key Fundamental Research Project [2007C13815406]
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6264
URL查看原文
Archive Date2009-06-19
WOS IDWOS:000268368900017
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordADDITIONAL COMPONENTS ; SYSTEM ; AURIGAE
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5831
Collection双星与变星研究组
Corresponding AuthorYing, ZL (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, P. R. China
2.United Laboratory of Optical Astronomy, Chinese Academy of Sciences (ULOAC), 100012 Beijing, P. R. China
3.Graduate School of the Chinese Academy of Sciences, 100049 Beijing P. R. China
4.Institute of Theoretical Physics and Astrophysics, Masaryk University, Kotlárská 2, 611 37 Brno, Czech Republic
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhu LY,Qian SB,Liao WP,et al. New Period Investigation of Algol-like Near-Contact Binary EG Cephei[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2009,61(3):529-533.
APA Zhu LY,Qian SB,Liao WP,Miloslav, Z,Zdenek, M,&Ying, ZL .(2009).New Period Investigation of Algol-like Near-Contact Binary EG Cephei.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,61(3),529-533.
MLA Zhu LY,et al."New Period Investigation of Algol-like Near-Contact Binary EG Cephei".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 61.3(2009):529-533.
Files in This Item:
File Name/Size DocType Version Access License
New Period Investiga(499KB)期刊论文作者接受稿开放获取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
[Zhu LY(朱俐颖)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Liao WP(廖文萍)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhu LY(朱俐颖)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Liao WP(廖文萍)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhu LY(朱俐颖)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Liao WP(廖文萍)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: New Period Investigation of Algol-like Near-Contact Binary EG Cephei.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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