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A method for obtaining redshifts of quasars based on wavelet multi-scaling feature matching
Liu, Zhong-tian; Ll, Xiang-ru; Wu, Fu-chao; Zhao, Yong-heng
2006-09-01
发表期刊SPECTROSCOPY AND SPECTRAL ANALYSIS
卷号26期号:9页码:1738-1741
摘要The LAMOST project, the world's largest sky survey project being implemented in China, is expected to obtain 10(5) quasar spectra. The main objective of the present article is to explore methods that can be used to estimate the redshifts of quasar spectra from LAMOST. Firstly, the features of the broad emission lines are extracted from the quasar spectra to overcome the disadvantage of low signal-to-noise ratio. Then the redshifts of quasar spectra can be estimated by using the multi-scaling feature matching. The experiment with the 15, 715 quasars from the SDSS DR2 shows that the correct rate of redshift estimated by the method is 95.13% within an error range of 0.02. This method was designed to obtain the redshifts of quasar spectra with relative flux and a low signal-to-noise ratio, which is applicable to the LAMOST data and helps to study quasars and the large-scale structure of the universe etc.
关键词Wavelet Transform Feature Extraction Feature Matching Broad Emission Line
收录类别SCI
语种英语
WOS记录号WOS:000240785800042
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8305
专题光学天文研究部
作者单位1.Chinese Acad Sci, Natl Lab Pattern Recognit, Inst Automat, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
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GB/T 7714
Liu, Zhong-tian,Ll, Xiang-ru,Wu, Fu-chao,et al. A method for obtaining redshifts of quasars based on wavelet multi-scaling feature matching[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2006,26(9):1738-1741.
APA Liu, Zhong-tian,Ll, Xiang-ru,Wu, Fu-chao,&Zhao, Yong-heng.(2006).A method for obtaining redshifts of quasars based on wavelet multi-scaling feature matching.SPECTROSCOPY AND SPECTRAL ANALYSIS,26(9),1738-1741.
MLA Liu, Zhong-tian,et al."A method for obtaining redshifts of quasars based on wavelet multi-scaling feature matching".SPECTROSCOPY AND SPECTRAL ANALYSIS 26.9(2006):1738-1741.
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