Spectral classification of stars based on LAMOST spectra

	Spectral classification of stars based on LAMOST spectra
	Liu, Chao1 ; Cui, Wen-Yuan 2; Zhang, Bo1 ; Wan, Jun-Chen1 ; Deng, Li-Cai1 ; Hou, Yong-Hui 3; Wang, Yue-Fei 3; Yang, Ming1 ; Zhang, Yong 3
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2015-08-01
卷号	15 期号:8 页码:1137-1153
关键词	techniques: spectroscopic stars: general stars: fundamental parameters stars: statistics Galaxy: stellar contents
英文摘要	In this work, we select spectra of stars with high signal-to-noise ratio from LAMOST data and map their MK classes to the spectral features. The equivalent widths of prominent spectral lines, which play a similar role as multi-color photometry, form a clean stellar locus well ordered by MK classes. The advantage of the stellar locus in line indices is that it gives a natural and continuous classification of stars consistent with either broadly used MK classes or stellar astrophysical parameters. We also employ an SVM-based classification algorithm to assign MK classes to LAMOST stellar spectra. We find that the completenesses of the classifications are up to 90% for A and G type stars, but they are down to about 50% for OB and K type stars. About 40% of the OB and K type stars are mis-classified as A and G type stars, respectively. This is likely due to the difference in the spectral features between late B type and early A type stars or between late G and early K type stars being very weak. The relatively poor performance of the automatic MK classification with SVM suggests that the direct use of line indices to classify stars is likely a more preferable choice.
收录类别	SCI
语种	英语
WOS记录号	WOS:000360553400004
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5606]
专题	国家天文台_光学天文研究部
作者单位	1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 2.Hebei Normal Univ, Dept Phys, Shijiazhuang 050024, Peoples R China 3.Chinese Acad Sci, Nanjing Inst Astron Opt & Technol, Natl Astron Observ, Nanjing 210042, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Liu, Chao,Cui, Wen-Yuan,Zhang, Bo,et al. Spectral classification of stars based on LAMOST spectra[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2015,15(8):1137-1153.
APA	Liu, Chao.,Cui, Wen-Yuan.,Zhang, Bo.,Wan, Jun-Chen.,Deng, Li-Cai.,...&Zhang, Yong.(2015).Spectral classification of stars based on LAMOST spectra.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,15(8),1137-1153.
MLA	Liu, Chao,et al."Spectral classification of stars based on LAMOST spectra".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 15.8(2015):1137-1153.