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Identification of temperature anomaly RR Lyrae stars in LAMOST survey, misclassification and binarities
Li LJ(李临甲)1,2,3; Qian SB(钱声帮)1,2,3,4; Zhang J(张嘉)1,2,3; He JJ(何家佳)1,2,3; Zhu LY(朱俐颖)1,2,3,4
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
2020-06-01
Volume20Issue:6Pages:14
DOI10.1088/1674-4527/20/6/94
Contribution Rank第1完成单位
Indexed BySCI
Keywordtechniques: spectroscopic techniques: photometric stars: fundamental parameters stars: variables : RR Lyrae
Abstract

RR Lyrae stars, a well-known type of pulsating variable stars, have been known about for more than a century. A large amount of photometric data on RR Lyrae stars has been accumulated by space- and ground-based sky surveys, but the spectral data are relatively poor. Fortunately, the LAMOST sky survey project provides an opportunity to view them from the point of view of spectra. We collect the atmospheric parameters of 1685 RR Lyrae stars provided by the LAMOST catalog, and carry out research by using the reliable T-eff. We find that there is a clear correlation between their T-eff and pulsation periods, which is consistent with the pulsation and evolution theories of RR Lyrae stars. In addition, we focus on those RR Lyrae stars with abnormal temperatures. After analyzing the data from several photometric surveys, we find that some of these temperature anomalies are misclassified variable stars (e.g., eclipsing binaries, pulsating stars on main sequence), and some are RR Lyrae binary candidates. For the latter, the temperatures of potential companions should be lower and their luminosities should not be neglected (e.g.. red giant stars). We obtain that the ratio of temperature anomaly stars to all the sample stars is 4%, which means that the impact on the further analysis (e.g., kinematics analysis) is low. We also present the catalogs of spectral anomaly RR Lyrae stars.

Funding ProjectNational Development and Reform Commission ; National Natural Science Foundation of China[11803084] ; National Natural Science Foundation of China[11703082] ; National Natural Science Foundation of China[11325315] ; National Natural Science Foundation of China[11573063] ; National Natural Science Foundation of China[11611530685] ; Key Science Foundation of Yunnan Province[2017FA001]
Funding OrganizationNational Development and Reform Commission ; National Natural Science Foundation of China[11803084, 11703082, 11325315, 11573063, 11611530685] ; Key Science Foundation of Yunnan Province[2017FA001]
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:000545668200001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordVARIABLE-STARS ; GALACTIC BULGE ; DATA RELEASE ; CHROMOSPHERIC ACTIVITY ; STELLAR ACTIVITY ; CONFIGURATION ; CANDIDATES ; TELESCOPE ; CATALOG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/23545
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 AuthorLi LJ(李临甲)
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
Li LJ,Qian SB,Zhang J,et al. Identification of temperature anomaly RR Lyrae stars in LAMOST survey, misclassification and binarities[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2020,20(6):14.
APA Li LJ,Qian SB,Zhang J,He JJ,&Zhu LY.(2020).Identification of temperature anomaly RR Lyrae stars in LAMOST survey, misclassification and binarities.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,20(6),14.
MLA Li LJ,et al."Identification of temperature anomaly RR Lyrae stars in LAMOST survey, misclassification and binarities".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 20.6(2020):14.
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