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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
2006
发表期刊SPECTROSCOPY AND SPECTRAL ANALYSIS
卷号26期号:1页码:182-186
文章类型Article
摘要It 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.
关键词Normal Galaxies Redshift Lle Manifold Pca
WOS标题词Science & Technology ; Technology
关键词[WOS]SPECTRA
收录类别SCI
语种英语
WOS研究方向Spectroscopy
WOS类目Spectroscopy
WOS记录号WOS:000235046700049
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ia.ac.cn/handle/173211/9365
专题09年以前成果
作者单位1.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
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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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