YNAO OpenIR  > 双星与变星研究组
More than two hundred and fifty thousand spectroscopic binary or variable star candidates discovered by LAMOST
Qian SB(钱声帮)1,2,3,4; Shi XD(施相东)1,2,3,4; Zhu LY(朱俐颖)1,2,3,4; Li LJ(李临甲)1,2,3; Zhang J(张嘉)1,2,3; Zhao EG(赵二刚)1,2,3; Han ZT(韩忠涛)1,2,3; Zhou X(周肖)1,2,3; Fang XH(方小慧)1,2,3,4; Liao WP(廖文萍)1,2,3
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
2019-05-01
Volume19Issue:5Pages:12
DOI10.1088/1674-4527/19/5/64
Contribution Rank第1完成单位
Indexed BySCI
Keywordstars: fundamental parameters stars: binaries : spectroscopic stars: oscillations stars: binaries : eclipsing stars: variables: other
Abstract

About 786.4 thousand stars were observed by LAMOST twice or more during the first stage of its spectroscopic survey. The radial velocity differences for about 256 thousand targets are larger than 10 kms(-1) and they are possible spectroscopic binary or variable candidates (SBVCs). It is shown that most SBVCs are slightly metal poorer than the Sun. There are two peaks in the temperature distribution of SBVCs around 5760 K and 4870 K, while there are three peaks in the distribution of the gravitational acceleration at 2.461, 4.171 and 4.621 cms(-2). The locations of SBVCs on the [Fe/H]-T, [Fe/H]-log g, log g-T and H-R diagrams are investigated. It is found that the detected SBVCs could be classified into four groups. The first group has higher log g similar to 4. 621 and lower T similar to 4870 K which are mainly cool red dwarf binaries. The second group of SBVCs has log g around 4.171 cms(-2) that includes binaries and pulsating stars such as delta Sct and gamma Dor variables. The gravitational accelerations of the third group of SBVCs are higher and some of them are below the zero-agemain sequence. They may be contact binaries in which the primary components are losing energy to the secondaries in the common envelopes and are at a special stellar evolutionary stage. The last group is composed of giants or supergiants with log g around 2.461 cms(-2) that may be evolved pulsating stars. One target (C134624.29+333921.2) is confirmed as an eclipsing binary with a period of 0.65 days. A preliminary analysis suggests that it is a detached binary with a mass ratio of 0.46. The primary fills its critical Roche lobe by about 89%, indicating that mass transfer will occur between the two components.

Funding ProjectNational Development and Reform Commission
Funding OrganizationNational Development and Reform Commission
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
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Publication Place20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN1674-4527
URL查看原文
WOS IDWOS:000467595300002
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordACCURATE MASSES ; RADIAL-VELOCITY ; LIGHT ; PARAMETERS ; TELESCOPE ; CATALOG
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/20203
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 AuthorQian SB(钱声帮)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100101, China
4.University of Chinese Academy of Sciences, Beijing 100049, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qian SB,Shi XD,Zhu LY,et al. More than two hundred and fifty thousand spectroscopic binary or variable star candidates discovered by LAMOST[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2019,19(5):12.
APA Qian SB.,Shi XD.,Zhu LY.,Li LJ.,Zhang J.,...&Liao WP.(2019).More than two hundred and fifty thousand spectroscopic binary or variable star candidates discovered by LAMOST.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,19(5),12.
MLA Qian SB,et al."More than two hundred and fifty thousand spectroscopic binary or variable star candidates discovered by LAMOST".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 19.5(2019):12.
Files in This Item:
File Name/Size DocType Version Access License
More than two hundre(5739KB)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
[Qian SB(钱声帮)]'s Articles
[Shi XD(施相东)]'s Articles
[Zhu LY(朱俐颖)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Qian SB(钱声帮)]'s Articles
[Shi XD(施相东)]'s Articles
[Zhu LY(朱俐颖)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Qian SB(钱声帮)]'s Articles
[Shi XD(施相东)]'s Articles
[Zhu LY(朱俐颖)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: More than two hundred and fifty thousand spectroscopic binary or variable star candidates discovered by LAMOST.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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