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Automated separation of stars and normal galaxies based on statistical mixture modeling with RBF neural networks
Qin, DM; Guo, P; Hu, ZY; Zhao, YH
2003-06-01
发表期刊CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
卷号3期号:3页码:277-286
文章类型Article
摘要For LAMOST, the largest sky survey program in China, the solution of the problem of automatic discrimination of stars from galaxies by spectra has shown that the results of the PSF test can be significantly refined. However, the problem is made worse when the redshifts of galaxies are not available. We present a new automatic method of star/(normal) galaxy separation, which is based on Statistical Mixture Modeling with Radial Basis Function Neural Networks (SMM-RBFNN). This work is a continuation of our previous one, where active and non-active celestial objects were successfully segregated. By combining the method in this paper and the previous one, stars can now be effectively separated from galaxies and AGNs by their spectra-a major goal of LAMOST, and an indispensable step in any automatic spectrum classification system. In our work, the training set includes standard stellar spectra from Jacoby's spectrum library and simulated galaxy spectra of EO, SO, Sa, Sb types with redshift ranging from 0 to 1.2, and the test set of stellar spectra from Pickles' atlas and SDSS spectra of normal galaxies with SNR of 13. Experiments show that our SMM-RBFNN is more efficient in both the training and testing stages than the BPNN (back propagation neural networks), and more importantly, it can achieve a good classification accuracy of 99.22% and 96.52%, respectively for stars and normal galaxies.
关键词Methods : Data Analysis Techniques : Spectroscopic Stars : General Galaxies : Stellar Content
WOS标题词Science & Technology ; Physical Sciences
关键词[WOS]SPECTRAL CLASSIFICATION ; STELLAR SPECTRA ; ULTRAVIOLET ; LIBRARY
收录类别SCI
语种英语
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000183615600010
引用统计
文献类型期刊论文
条目标识符http://ir.ia.ac.cn/handle/173211/9882
专题09年以前成果
作者单位1.Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit Lab, Beijing 100080, Peoples R China
2.Beijing Normal Univ, Dept Comp Sci, Beijing 100875, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
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GB/T 7714
Qin, DM,Guo, P,Hu, ZY,et al. Automated separation of stars and normal galaxies based on statistical mixture modeling with RBF neural networks[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2003,3(3):277-286.
APA Qin, DM,Guo, P,Hu, ZY,&Zhao, YH.(2003).Automated separation of stars and normal galaxies based on statistical mixture modeling with RBF neural networks.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,3(3),277-286.
MLA Qin, DM,et al."Automated separation of stars and normal galaxies based on statistical mixture modeling with RBF neural networks".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 3.3(2003):277-286.
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