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New ZZ Ceti Stars from the LAMOST Survey
Su, Jie1,2,5; Fu, Jianning1; Lin GF(林桂芳)2,3,4; Chen, Fangfang1; Khokhuntod, Pongsak1; Li, Chunqian1
Source PublicationASTROPHYSICAL JOURNAL
2017-09-20
Volume847Issue:1
DOI10.3847/1538-4357/aa88a8
Contribution Rank第2完成单位
Indexed BySCI
KeywordStars: Oscillations Surveys White Dwarfs
Abstract

The spectroscopic sky survey carried out by the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) provides the largest stellar spectra library in the world to date. A large number of new DA white dwarfs had been identified based on the LAMOST spectra. The effective temperature (T-eff) and surface gravity (log g) of most DA white dwarfs were determined and published in the catalogs. We selected ZZ Ceti candidates from the published catalogs by considering whether their Teff are situated in the ZZ Ceti instability strip. The follow-up time-series photometric observations for the candidates were performed in 2015 and 2016. Four stars: LAMOST. J004628.31+343319.90, LAMOST. J062159.49+252335.9, LAMOST. J010302.46+433756.2, and LAMOST. J013033.90+273757.9 are finally confirmed to be new ZZ Ceti stars. They show dominant peaks with amplitudes rising above the 99.9% confidence level in the amplitude spectra. As LAMOST. J004628.31+343319.90 has an estimated mass of similar to 0.40 M circle dot, and LAMOST. J013033.90+273757.9 has a mass of similar to 0.45 M circle dot derived from their log g values, these two stars are inferred to be potential helium-core white dwarfs.

Funding ProjectChina Postdoctoral Science Foundation[2015M570960] ; foundation of Key Laboratory for the Structure and Evolution of Celestial Objects ; Chinese Academy of Sciences[OP201406] ; National Natural Science Foundation of China (NSFC)[11673003] ; National Basic Research Program of China (973 Program)[2014CB845700] ; National Basic Research Program of China (973 Program)[2013CB834900] ; NSFC[11503079] ; National Development and Reform Commission ; Chinese Academy of Sciences ; People's Government of Yunnan Province ; Open Project Program of the Key Laboratory of Optical Astronomy ; National Astronomical Observatories
Funding OrganizationChina Postdoctoral Science Foundation[2015M570960] ; foundation of Key Laboratory for the Structure and Evolution of Celestial Objects ; Chinese Academy of Sciences[OP201406] ; National Natural Science Foundation of China (NSFC)[11673003] ; National Basic Research Program of China (973 Program)[2014CB845700, 2013CB834900] ; NSFC[11503079] ; National Development and Reform Commission ; Chinese Academy of Sciences ; People's Government of Yunnan Province ; Open Project Program of the Key Laboratory of Optical Astronomy ; National Astronomical Observatories
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000411341100010
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordWHITE-DWARF STARS ; PHOTOMETRIC SELECTION ; INSTABILITY STRIP ; PILOT SURVEY ; DISCOVERY ; TELESCOPE ; ASTEROSEISMOLOGY ; INSTRUMENT ; CANDIDATES ; PULSATION
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/11944
Collection恒星物理研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorFu, Jianning
Affiliation1.Department of Astronomy, Beijing Normal University, Beijing 100875, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China
3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, China
5.LAMOST Fellow.
Recommended Citation
GB/T 7714
Su, Jie,Fu, Jianning,Lin GF,et al. New ZZ Ceti Stars from the LAMOST Survey[J]. ASTROPHYSICAL JOURNAL,2017,847(1).
APA Su, Jie,Fu, Jianning,Lin GF,Chen, Fangfang,Khokhuntod, Pongsak,&Li, Chunqian.(2017).New ZZ Ceti Stars from the LAMOST Survey.ASTROPHYSICAL JOURNAL,847(1).
MLA Su, Jie,et al."New ZZ Ceti Stars from the LAMOST Survey".ASTROPHYSICAL JOURNAL 847.1(2017).
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