YNAO OpenIR  > 双星与变星研究组
Detection of a degenerate companion of the SX phoenicis star KZ Hydrae by studying its long-term variability
Fu, JN1; Khokhuntod, P2; Rodriguez, E3; Boonyarak, C2; Marak, K2; Lopez-Gonzalez, MJ3; Zhu LY(朱俐颖)4; Qian SB(钱声帮)4; Jiang, SY5; Fu, JN (reprint author), Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China.
Source PublicationASTRONOMICAL JOURNAL
2008-05
Volume135Issue:5Pages:1958-1967
DOI10.1088/0004-6256/135/5/1958
Contribution Rank第4完成单位
Indexed BySCI
KeywordStars : Individual (Kz Hya) Stars : Variables : Other Techniques : Photometric
AbstractWe present 109 new times of maximum light of the SX Phoenicis (SX Phe) star KZ Hydrae (KZ Hya) based mainly on our extensive photometric observations for two decades, leading to determination of a general ephemeris combined with the data in the literature. The O - C diagram reveals a continuously increasing period change combined with the light traveling time effect of the orbital motion of KZ Hya in a binary system with an orbital period of 26.8 +/- 0.2 years. The deduced mass of the companion cannot be smaller than 0.83 M circle dot. Since no sign of the companion has ever been observed spectroscopically and the observed color index b-y excludes the possibility of the companion being a late-type main-sequence or dwarf star, KZ Hya becomes the first SX Phe star for which a degenerate companion is detected. The pulsation properties are studied by analyzing the Fourier spectra of the observed light curves while the fundamental parameters are deduced with the simultaneous multicolor uvby beta data, showing this star to be a strong low-metallicity high-amplitude SX Phe-type variable pulsating in the fundamental radial mode. No signs of multiperiodicity or significant long-term changes in amplitude are detected in the pulsation of this variable.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6256
URL查看原文
WOS IDWOS:000255407700026
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordAMPLITUDE DELTA-SCUTI ; PULSATING STARS ; PHOTOMETRY ; HD-94033 ; TELESCOPE ; CATALOG ; COLORS
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5812
Collection双星与变星研究组
Corresponding AuthorFu, JN (reprint author), Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China.
Affiliation1.Department of Astronomy, Beijing Normal University, Beijing 100875, China
2.Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand
3.Instituto de Astrofísica de Andalucia, CSIC, PO Box 3004, 18080 Granada, Spain
4.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China
5.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
Recommended Citation
GB/T 7714
Fu, JN,Khokhuntod, P,Rodriguez, E,et al. Detection of a degenerate companion of the SX phoenicis star KZ Hydrae by studying its long-term variability[J]. ASTRONOMICAL JOURNAL,2008,135(5):1958-1967.
APA Fu, JN.,Khokhuntod, P.,Rodriguez, E.,Boonyarak, C.,Marak, K.,...&Fu, JN .(2008).Detection of a degenerate companion of the SX phoenicis star KZ Hydrae by studying its long-term variability.ASTRONOMICAL JOURNAL,135(5),1958-1967.
MLA Fu, JN,et al."Detection of a degenerate companion of the SX phoenicis star KZ Hydrae by studying its long-term variability".ASTRONOMICAL JOURNAL 135.5(2008):1958-1967.
Files in This Item:
File Name/Size DocType Version Access License
DETECTION OF A DEGEN(1950KB)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
[Fu, JN]'s Articles
[Khokhuntod, P]'s Articles
[Rodriguez, E]'s Articles
Baidu academic
Similar articles in Baidu academic
[Fu, JN]'s Articles
[Khokhuntod, P]'s Articles
[Rodriguez, E]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Fu, JN]'s Articles
[Khokhuntod, P]'s Articles
[Rodriguez, E]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: DETECTION OF A DEGENERATE COMPANION OF THE SX PHOENICIS STAR KZ HYDRAE BY STUDYING ITS LONG-TERM VARIABILITY.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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