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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; Fu, Jianning(Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China)
发表期刊ASTROPHYSICAL JOURNAL
2017-09-20
卷号847期号:1
DOI10.3847/1538-4357/aa88a8
产权排序第2完成单位
收录类别SCI
关键词Stars: Oscillations Surveys White Dwarfs
摘要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.
项目资助者China 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
语种英语
学科领域天文学
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000411341100010
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]WHITE-DWARF STARS ; PHOTOMETRIC SELECTION ; INSTABILITY STRIP ; PILOT SURVEY ; DISCOVERY ; TELESCOPE ; ASTEROSEISMOLOGY ; INSTRUMENT ; CANDIDATES ; PULSATION
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/11944
专题恒星物理研究组
中国科学院天体结构与演化重点实验室
通讯作者Fu, Jianning(Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China)
作者单位1.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.
推荐引用方式
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.,...&Fu, Jianning.(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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