YNAO OpenIR  > 双星与变星研究组
WZ Sge: An eclipsing cataclysmic variable evolving towards the period minimum
Han ZT(韩忠涛)1,2,3; Qian SB(钱声帮)1,2,3; Voloshina, Irina4; Zhu LY(朱俐颖)1,2,3
Source PublicationNEW ASTRONOMY
2017-10-01
Volume56Pages:22-27
DOI10.1016/j.newast.2017.04.006
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries Eclipsing - Binaries Evolution - Stars Cataclysmic Variables - Stars Period Bouncer - Stars Individual (Wz Sge)
Abstract

We present the photometric results of the eclipsing cataclysmic variable (CV) WZ Sge near the period minimum (P-min). Eight new mid-eclipse times were determined and the orbital ephemeris was updated. Our result shows that the orbital period of WZ Sge is decreasing at a rate of (P) over dot = -2.72(+/- 0.23) x 10(-13) ss(-1). This secular decrease, coupled with previous detection of its donor, suggest that WZ Sge is a pre-bounce system. Further analysis indicates that the observed period decrease rate is about 1.53 times higher than pure gravitational radiation (GR) driving. We constructed the evolutionary track of WZ Sge, which predicts that P-min of WZ Sge is similar to 77.98(+/- 0.90) min. If the orbital period decreases at the current rate, WZ Sge will evolve past its Pmin after similar to 253 Myr. Based on the period evolution equation we find (M) over dot(2) similar or equal to 4.04(+/- 0.10) x 10(-11)M(circle dot)yr(-1), which is compatible with the current concept of CV evolution at ultrashort orbital periods. (C) 2017 Elsevier B.V. All rights reserved.

Funding ProjectChinese Natural Science Foundation[11325315] ; Chinese Natural Science Foundation[11611530685] ; Chinese Natural Science Foundation[11573063] ; Chinese Natural Science Foundation[11133007] ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of the Chinese Academy of Sciences[XDB09010202] ; Science Foundation of Yunnan Province[2012HC011] ; Russian Foundation for Basic Research[17-52-53200]
Funding OrganizationChinese Natural Science Foundation[11325315, 11611530685, 11573063, 11133007] ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of the Chinese Academy of Sciences[XDB09010202] ; Science Foundation of Yunnan Province[2012HC011] ; Russian Foundation for Basic Research[17-52-53200]
Language英语
Subject Area天文学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherELSEVIER SCIENCE BV
Publication PlacePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN1384-1076
URL查看原文
Archive Date2017-06-28
WOS IDWOS:000404504300005
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordDWARF NOVA ; BROWN DWARF ; EVOLUTION ; SAGITTAE ; BINARY ; STARS ; DONOR ; GAP
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/10145
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 AuthorHan ZT(韩忠涛)
Affiliation1.Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650216, Peoples R China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P. O. Box 110, 650216 Kunming, China
3.University of Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, China
4.Sternberg Astronomical Institute, Moscow State University, Universitetskij prospect 13, Moscow 119992, Russia
Recommended Citation
GB/T 7714
Han ZT,Qian SB,Voloshina, Irina,et al. WZ Sge: An eclipsing cataclysmic variable evolving towards the period minimum[J]. NEW ASTRONOMY,2017,56:22-27.
APA Han ZT,Qian SB,Voloshina, Irina,&Zhu LY.(2017).WZ Sge: An eclipsing cataclysmic variable evolving towards the period minimum.NEW ASTRONOMY,56,22-27.
MLA Han ZT,et al."WZ Sge: An eclipsing cataclysmic variable evolving towards the period minimum".NEW ASTRONOMY 56(2017):22-27.
Files in This Item:
File Name/Size DocType Version Access License
WZ Sge An eclipsing (591KB)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
[Han ZT(韩忠涛)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Voloshina, Irina]'s Articles
Baidu academic
Similar articles in Baidu academic
[Han ZT(韩忠涛)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Voloshina, Irina]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Han ZT(韩忠涛)]'s Articles
[Qian SB(钱声帮)]'s Articles
[Voloshina, Irina]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: WZ Sge An eclipsing cataclysmic variable evolving towards the period minimum.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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