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A novel method for the determination of redshifts of normal galaxies by non-linear dimensionality reduction
Xu, X; Wu, FC; Hu, ZY; Luo, AL
Source PublicationSPECTROSCOPY AND SPECTRAL ANALYSIS
2006
Volume26Issue:1Pages:182-186
SubtypeArticle
AbstractIt is difficult to determine the redshifts of normal galaxies (NG) from their spectra because of their common weak absorption property. In the present work, a novel method is proposed to effectively deal with this issue. The proposed method is composed of the following three parts: At first, the wavelet transform coefficients at the fourth scaling are experimentally found to be appropriate and used as our features to represent the absorption information from NG absorption lines, break points, and absorption bands. Then, the features are mapped by a non-linear method, LLE(locally linear embedding), onto an one-dimensional manifold in the 3D space; Finally, the NG redshifts are obtained by the nearest neighborhood technique from the redshift distribution on the manifold. Besides, the proposed method is compared with widely used PCA method in the literature with SDSS database, and is shown to be more accurate for the redshifts determination.
KeywordNormal Galaxies Redshift Lle Manifold Pca
WOS HeadingsScience & Technology ; Technology
WOS KeywordSPECTRA
Indexed BySCI
Language英语
WOS Research AreaSpectroscopy
WOS SubjectSpectroscopy
WOS IDWOS:000235046700049
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ia.ac.cn/handle/173211/9365
Collection09年以前成果
Affiliation1.Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Robot Vis Grp, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Natl Astron Observat, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Xu, X,Wu, FC,Hu, ZY,et al. A novel method for the determination of redshifts of normal galaxies by non-linear dimensionality reduction[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2006,26(1):182-186.
APA Xu, X,Wu, FC,Hu, ZY,&Luo, AL.(2006).A novel method for the determination of redshifts of normal galaxies by non-linear dimensionality reduction.SPECTROSCOPY AND SPECTRAL ANALYSIS,26(1),182-186.
MLA Xu, X,et al."A novel method for the determination of redshifts of normal galaxies by non-linear dimensionality reduction".SPECTROSCOPY AND SPECTRAL ANALYSIS 26.1(2006):182-186.
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