中国科学院紫金山天文台机构知识库
Advanced  
PMO OpenIR  > 宇宙伽马暴、中子星及相关物理研究团组  > 期刊论文
题名: PHOTOMETRY OF VARIABLE STARS FROM THE THU-NAOC TRANSIENT SURVEY. I. THE FIRST TWO YEARS
作者: Yao, Xinyu1, 2, 3, 4; Wang, Lingzhi3, 4, 5, 6; Wang, Xiaofeng3, 4; Zhang, Tianmeng5; Chen, Juncheng3, 4; Yuan, Wenlong3, 4, 7; Mo, Jun3, 4; Li, Wenxiong3, 4; Jin ZhiPing(金志平)2; Wu XueFeng(吴雪峰)2; Nie, JunDan5; Zhou, Xu5
刊名: ASTRONOMICAL JOURNAL
出版日期: 2015-10-01
卷号: 150, 期号:4
关键词: binaries: eclipsing ; stars: evolution ; stars: variables: general ; stars: variables: RR Lyrae
DOI: 10.1088/0004-6256/150/4/107
文章类型: Article
英文摘要: In this paper, we report the detections of stellar variabilities from the first two years of observations of a sky area of about 1300 square degrees from the Tsinghua University-NAOC Transient Survey. A total of 1237 variable stars (including 299 new ones) were detected with a brightness <18.0 mag and a magnitude variation greater than or similar to 0.1 mag on a timescale from a few hours to a few hundred days. Among such detections, we tentatively identified 661 RR Lyrae stars, 431 binaries, 72 semi-regular pulsators, 29 Mira stars, 11 slow irregular variables, 11 RS Canum Venaticorum stars, 7 Gamma Doradus stars, 5 long-period variables, 3 W Virginis stars, 3 Delta Scuti stars, 2 Anomalous Cepheids, 1 Cepheid, and 1 nova-like star based on their time-series variability index Js and their phased diagrams. Moreover, we found that 14 RR Lyrae stars show the Blazhko effect and 67 contact eclipsing binaries exhibit the O'Connell effect. Since the period and amplitude of light variations of RR Lyrae variables depend on their chemical compositions, their photometric observations can be used to investigate the distribution of metallicity along the direction perpendicular to the Galactic disk. We find that the metallicity of RR Lyrae stars shows large scatter at regions closer to the Galactic plane (e.g., -3.0 < [Fe/H] < 0) but tends to converge at [Fe/H] similar to -1.7 at larger Galactic latitudes. This variation may be related to the fact that the RRAB Lyrae stars in the Galactic halo come from globular clusters with different metallicities and vertical distances, i.e., OoI and OoII populations, favoring the dual-halo model.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: RR-LYRAE STARS ; LARGE-MAGELLANIC-CLOUD ; GALACTIC HALO ; ECLIPSING BINARIES ; FREQUENCY-ANALYSIS ; GLOBULAR-CLUSTERS ; SPECTRAL-ANALYSIS ; CATALINA SURVEYS ; LIGHT CURVES ; SPACED DATA
收录类别: SCI
项目资助者: National Basic Research Program (973 Program) of China(2013CB834903 ; National Natural Science Foundation of China (NSFC)(11178003 ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09000000) ; Foundation of Tsinghua University(2011Z02170) ; One-hundred-talents program of the Chinese Academy of Sciences(034031001) ; One-hundred-talents Program ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Natural Science Foundation of Jiangsu Province ; 2012CB821800 ; 11303041 ; 2013CB834901) ; 11322328 ; 11325313)
语种: 英语
WOS记录号: WOS:000365863900010
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16075
Appears in Collections:宇宙伽马暴、中子星及相关物理研究团组_期刊论文

Files in This Item:

There are no files associated with this item.


作者单位: 1.Qinghai Normal Univ, Xining 810008, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
3.Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
4.Tsinghua Univ, Tsinghua Ctr Astrophys THCA, Beijing 100084, Peoples R China
5.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
6.Chinese Acad Sci South Amer Ctr Astron, Santiago, Chile
7.Texas A&M Univ, Dept Phys & Astron, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Yao, Xinyu]'s Articles
[Wang, Lingzhi]'s Articles
[Wang, Xiaofeng]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Yao, Xinyu]‘s Articles
[Wang, Lingzhi]‘s Articles
[Wang, Xiaofeng]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

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

 

 

Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院紫金山天文台 - Feedback
Powered by CSpace