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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
Source PublicationSPECTROSCOPY AND SPECTRAL ANALYSIS
Volume26Issue:9Pages:1738-1741
AbstractThe 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.
KeywordWavelet Transform Feature Extraction Feature Matching Broad Emission Line
Indexed BySCI
Language英语
WOS IDWOS:000240785800042
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8305
Collection光学天文研究部
Affiliation1.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
Recommended Citation
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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