巡天光谱分类前的预处理——流量标准化

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Abstract Celestial spectra should be preprocessed before automated classification to eliminate the disturbance of noise,observation environment,and flux aberrance. In the present work,the authors studied the spectrum flux standardization problem. By analyzing the disturbing factors and their characteristics,the authors put forward a theoretical model for spectra flux,and correspondingly give several flux standardizing methods. The rationality/correctness of the model,and the satisfactory performance of the proposed methods have been obtained by the experiments over normal galaxies (NGs) and quasi-stellar object (Qso). Furthermore,the authors theoretically analyze,compare and evaluate them. In particular,this work indicated that the conventional method is worse than the proposed one. And the investigation is also particularly significant for other automatic spectrum processing study,e.g. redshift determination,effective temperature,metallic estimation,etc.

Key words：Celestial spectrum classification;Flux model;Flux standization;Preprocessing;Qso;Principal component analysis (PCA)

Received: 2005-12-06 Accepted: 2006-03-16

ZTFLH:

TN911.7

Corresponding Authors: HU Zhan-yi E-mail: huzy@nlpr.ia.ac.cn

Cite this article:

LI Xiang-ru,LIU Zhong-tian,HU Zhan-yi, et al. Celestial Spectrum Flux Standardization for Classification[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(07): 1448-1451.

URL:

https://www.gpxygpfx.com/EN/Y2007/V27/I07/1448

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