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Spectral classification and composites of galaxies in LAMOST DR4
Wang, Li-Li1,2,3; Luo, A-Li1; Shen, Shi-Yin4; Hou, Wen1; Kong, Xiao1; Song, Yi-Han1; Zhang, Jian-Nan1; Wu, Hong1; Cao, Zi-Huang1; Hou, Yong-Hui5; Wang, Yue-Fei5; Zhang, Yong5; Zhao, Yong-Heng1
2018-02-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume474Issue:2Pages:1873-1885
AbstractWe study the classification and composite spectra of galaxies in the fourth data release (DR4) of the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST). We select 40 182 spectra of galaxies from LAMOST DR4, which have photometric information but no spectroscopic observations in the Sloan Digital Sky Survey (SDSS). These newly observed spectra are recalibrated and classified into six classes - passive, H alpha-weak, star-forming, composite, LINER and Seyfert - using the line intensity (H beta, [O-III]lambda 5007, H alpha and [N-II]lambda 6585). We also study the correlation between spectral class and morphological type through three parameters: concentration index, (u-r) colour and D4000(n) index. We calculate composite spectra of high signal-to-noise ratio (S/N) for six spectral classes and, using these composites, we pick out some features that can differentiate the classes effectively, including H beta, Fe5015, H gamma(A), HK and the Mg-2 band. In addition, we compare our composite spectra with the SDSS ones and analyse their differences. A galaxy catalogue of 40 182 newly observed spectra (36 601 targets) and the composite spectra of the six classes are available online.
Keywordmethods: data analysis techniques: spectroscopic catalogues galaxies: statistics
Funding OrganizationNational Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission
DOI10.1093/mnras/stx2798
WOS KeywordDIGITAL-SKY-SURVEY ; ACTIVE GALACTIC NUCLEI ; STAR-FORMATION HISTORIES ; SEMIEMPIRICAL ANALYSIS ; HOST GALAXIES ; DATA RELEASE ; SPECTROSCOPIC SURVEY ; METALLICITY RELATION ; STELLAR POPULATIONS ; FORMING GALAXIES
Language英语
Funding ProjectNational Key Basic Research Program of China[2014CB845700] ; National Natural Science Foundation of China[11390371] ; National Natural Science Foundation of China[11233004] ; National Development and Reform Commission
Funding OrganizationNational Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000424343600032
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/37233
Collection中国科学院国家天文台
Corresponding AuthorLuo, A-Li
Affiliation1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
2.Dezhou Univ, Sch Informat Management, Dezhou 253023, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
5.Chinese Acad Sci, Nanjing Inst Astron Opt & Technol, Natl Astron Observ, Nanjing 210042, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Wang, Li-Li,Luo, A-Li,Shen, Shi-Yin,et al. Spectral classification and composites of galaxies in LAMOST DR4[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,474(2):1873-1885.
APA Wang, Li-Li.,Luo, A-Li.,Shen, Shi-Yin.,Hou, Wen.,Kong, Xiao.,...&Zhao, Yong-Heng.(2018).Spectral classification and composites of galaxies in LAMOST DR4.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,474(2),1873-1885.
MLA Wang, Li-Li,et al."Spectral classification and composites of galaxies in LAMOST DR4".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 474.2(2018):1873-1885.
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