Spectral classification and composites of galaxies in LAMOST DR4

doi:10.1093/mnras/stx2798

CORC > 国家天文台 > 中国科学院国家天文台

	Spectral classification and composites of galaxies in LAMOST DR4
	Wang, Li-Li 1,2,4; Luo, A-Li 2; Shen, Shi-Yin 5; Hou, Wen 2; Kong, Xiao 2; Song, Yi-Han 2; Zhang, Jian-Nan 2; Wu, Hong 2; Cao, Zi-Huang 2; Hou, Yong-Hui 3
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2018-02-01
卷号	474 期号:2 页码:1873-1885
关键词	methods: data analysis techniques: spectroscopic catalogues galaxies: statistics
ISSN号	0035-8711
DOI	10.1093/mnras/stx2798
英文摘要	We 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.
资助项目	National 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
WOS关键词	DIGITAL-SKY-SURVEY ; ACTIVE GALACTIC NUCLEI ; STAR-FORMATION HISTORIES ; SEMIEMPIRICAL ANALYSIS ; HOST GALAXIES ; DATA RELEASE ; SPECTROSCOPIC SURVEY ; METALLICITY RELATION ; STELLAR POPULATIONS ; FORMING GALAXIES
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000424343600032
资助机构	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 ; 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
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/37232]
专题	中国科学院国家天文台
通讯作者	Luo, A-Li
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 3.Chinese Acad Sci, Nanjing Inst Astron Opt & Technol, Natl Astron Observ, Nanjing 210042, Jiangsu, Peoples R China 4.Dezhou Univ, Sch Informat Management, Dezhou 253023, Peoples R China 5.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
推荐引用方式 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.