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Radio stars observed in the LAMOST spectral survey
Zhang, Li-Yun1; Yue, Qiang1; Lu, Hong-Peng1; Han, Xian-Ming L.1,2; Zhang, Yong3; Shi, Jian-Rong4; Wang, Yue-Fei3; Hou, Yong-Hui3; Cao, Zi-Huang4
2017-09-01
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
卷号17期号:10
摘要Radio stars have attracted astronomers' attention for several decades. To better understand the physics behind stellar radio emissions, it is important to study their optical behaviors. The LAMOST survey provides a large database for researching stellar spectroscopic properties of radio stars. In this work, we concentrate on their spectroscopic properties and infer physical properties from their spectra, such as stellar activity and variability. We mined big data from the LAMOST spectral survey Data Release 2 (DR2), published on 2016 June 30, by cross-matching them with radio stars from FIRST and other surveys. We obtained 783 good stellar spectra with high signal to noise ratio for 659 stars. The criteria for selection were positional coincidence within 1.5 '' and LAMOST objects classified as stars. We calculated the equivalent widths (EWs) of the Ca II H&K, H delta, H gamma, H beta, H alpha and Ca II IRT lines by integrating the line profiles. Using the EWs of the H alpha line, we detected 147 active stellar spectra of 89 objects having emissions above the H alpha continuum. There were also 36 objects with repeated spectra, 28 of which showed chromospheric activity variability. Furthermore, we found 14 radio stars emitting noticeably in the Ca II IRT lines. The low value of the EW8542/EW8498 ratio for these 14 radio stars possibly alludes to chromospheric plage regions.
文章类型Article
关键词Stars: Chromosphere Stars: Activity Stars: Radio Stars: Spectroscopic
WOS标题词Science & Technology ; Physical Sciences
资助者NSFC(U1631236 ; NSFC(U1631236 ; Chinese Academy of Sciences (CAS)(U1631236 ; Chinese Academy of Sciences (CAS)(U1631236 ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Science Foundation ; National Science Foundation ; National Development and Reform Commission ; National Development and Reform Commission ; U1431114 ; U1431114 ; U1431114 ; U1431114 ; U1631109 ; U1631109 ; U1631109 ; U1631109 ; 11263001) ; 11263001) ; 11263001) ; 11263001) ; NSFC(U1631236 ; NSFC(U1631236 ; Chinese Academy of Sciences (CAS)(U1631236 ; Chinese Academy of Sciences (CAS)(U1631236 ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Science Foundation ; National Science Foundation ; National Development and Reform Commission ; National Development and Reform Commission ; U1431114 ; U1431114 ; U1431114 ; U1431114 ; U1631109 ; U1631109 ; U1631109 ; U1631109 ; 11263001) ; 11263001) ; 11263001) ; 11263001)
DOI10.1088/1674-4527/17/10/105
关键词[WOS]DIGITAL SKY SURVEY ; MAIN-SEQUENCE STARS ; T-TAURI STARS ; CHROMOSPHERIC ACTIVITY ; MAGNETIC ACTIVITY ; TELESCOPE LAMOST ; ECHELLE SPECTRA ; EV-LACERTAE ; L-DWARFS ; X-RAY
收录类别SCI
语种英语
资助者NSFC(U1631236 ; NSFC(U1631236 ; Chinese Academy of Sciences (CAS)(U1631236 ; Chinese Academy of Sciences (CAS)(U1631236 ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Science Foundation ; National Science Foundation ; National Development and Reform Commission ; National Development and Reform Commission ; U1431114 ; U1431114 ; U1431114 ; U1431114 ; U1631109 ; U1631109 ; U1631109 ; U1631109 ; 11263001) ; 11263001) ; 11263001) ; 11263001) ; NSFC(U1631236 ; NSFC(U1631236 ; Chinese Academy of Sciences (CAS)(U1631236 ; Chinese Academy of Sciences (CAS)(U1631236 ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; National Science Foundation ; National Science Foundation ; National Development and Reform Commission ; National Development and Reform Commission ; U1431114 ; U1431114 ; U1431114 ; U1431114 ; U1631109 ; U1631109 ; U1631109 ; U1631109 ; 11263001) ; 11263001) ; 11263001) ; 11263001)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000415007500006
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/20205
专题光学天文研究部
作者单位1.Guizhou Univ, Dept Phys & Astron, Coll Phys, Guiyang 550025, Guizhou, Peoples R China
2.Butler Univ, Dept Phys & Astron, Indianapolis, IN 46208 USA
3.Chinese Acad Sci, Natl Astron Observ, Nanjing Inst Astron Opt & Technol, Nanjing 210042, Jiangsu, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
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GB/T 7714
Zhang, Li-Yun,Yue, Qiang,Lu, Hong-Peng,et al. Radio stars observed in the LAMOST spectral survey[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2017,17(10).
APA Zhang, Li-Yun.,Yue, Qiang.,Lu, Hong-Peng.,Han, Xian-Ming L..,Zhang, Yong.,...&Cao, Zi-Huang.(2017).Radio stars observed in the LAMOST spectral survey.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,17(10).
MLA Zhang, Li-Yun,et al."Radio stars observed in the LAMOST spectral survey".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 17.10(2017).
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