ON THE CONSTRUCTION OF A NEW STELLAR CLASSIFICATION TEMPLATE LIBRARY FOR THE LAMOST SPECTRAL ANALYSIS PIPELINE
文献类型：期刊论文
| 作者 | Wei, Peng1,2 ; Luo, Ali1,2,3; Li, Yinbi1; Tu, Liangping1,4; Wang, Fengfei1; Zhang, Jiannan1; Chen, Xiaoyan1; Hou, Wen1,2; Kong, Xiao1,2; Wu, Yue1
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2014-05-01 |
| 卷号 | 147期号:5 |
| 关键词 | methods: data analysis methods: statistical surveys |
| 英文摘要 | The LAMOST spectral analysis pipeline, called the 1D pipeline, aims to classify and measure the spectra observed in the LAMOST survey. Through this pipeline, the observed stellar spectra are classified into different subclasses by matching with template spectra. Consequently, the performance of the stellar classification greatly depends on the quality of the template spectra. In this paper, we construct a new LAMOST stellar spectral classification template library, which is supposed to improve the precision and credibility of the present LAMOST stellar classification. About one million spectra are selected from LAMOST Data Release One to construct the new stellar templates, and they are gathered in 233 groups by two criteria: (1) pseudo g-r colors obtained by convolving the LAMOST spectra with the Sloan Digital Sky Survey ugriz filter response curve, and (2) the stellar subclass given by the LAMOST pipeline. In each group, the template spectra are constructed using three steps. (1) Outliers are excluded using the Local Outlier Probabilities algorithm, and then the principal component analysis method is applied to the remaining spectra of each group. About 5% of the one million spectra are ruled out as outliers. (2) All remaining spectra are reconstructed using the first principal components of each group. (3) The weighted average spectrum is used as the template spectrum in each group. Using the previous 3 steps, we initially obtain 216 stellar template spectra. We visually inspect all template spectra, and 29 spectra are abandoned due to low spectral quality. Furthermore, the MK classification for the remaining 187 template spectra is manually determined by comparing with 3 template libraries. Meanwhile, 10 template spectra whose subclass is difficult to determine are abandoned. Finally, we obtain a new template library containing 183 LAMOST template spectra with 61 different MK classes by combining it with the current library. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000334591900008 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6536]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Shandong Univ, Sch Mech Elect & Informat Engn, Weihai 264209, Peoples R China 4.Liaoning Univ Sci & Technol, Sch Sci, Anshan 144051, Peoples R China 5.Taiyuan Univ Sci & Technol, Sch Comp Sci & Technol, Taiyuan 030024, Peoples R China 6.Univ Sci & Technol China, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wei, Peng,Luo, Ali,Li, Yinbi,et al. ON THE CONSTRUCTION OF A NEW STELLAR CLASSIFICATION TEMPLATE LIBRARY FOR THE LAMOST SPECTRAL ANALYSIS PIPELINE[J]. ASTRONOMICAL JOURNAL,2014,147(5). |
| APA | Wei, Peng.,Luo, Ali.,Li, Yinbi.,Tu, Liangping.,Wang, Fengfei.,...&Jin, Ge.(2014).ON THE CONSTRUCTION OF A NEW STELLAR CLASSIFICATION TEMPLATE LIBRARY FOR THE LAMOST SPECTRAL ANALYSIS PIPELINE.ASTRONOMICAL JOURNAL,147(5). |
| MLA | Wei, Peng,et al."ON THE CONSTRUCTION OF A NEW STELLAR CLASSIFICATION TEMPLATE LIBRARY FOR THE LAMOST SPECTRAL ANALYSIS PIPELINE".ASTRONOMICAL JOURNAL 147.5(2014). |
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来源：国家天文台
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