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Automated Separation of Stars and Normal Galaxies Based on Statistical Mixture Modeling with RBF Neural Net-works
Dongmei Qin1; Ping Guo2; Zhanyi Hu1; Yongheng Zhao3
2003
Source PublicationChinese Journal of Astronomy and Astrophysics
ISSN1009-9271
Volume3Issue:3Pages:277
AbstractFor LAMOST, the largest sky survey program in China, the solution ofthe problem of automatic discrimination of stars from galaxies by spectra has shownthat the results of the PSF test can be significantly refined. However, the problemis made worse when the redshifts of galaxies are not available. We present a newautomatic method of star/(normal) galaxy separation, which is based on StatisticalMixture Modeling with Radial Basis Function Neural Networks (SMM-RBFNN).This work is a continuation of our previous one, where active and non-active celestialobjects were successfully segregated. By combining the method in this paper andthe previous one, stars can now be effectively separated from galaxies and AGNs bytheir spectra-a major goal of LAMOST, and an indispensable step in any automaticspectrum classification system. In our work, the training set includes standardstellar spectra from Jacoby's spectrum library and simulated galaxy spectra of E0,SO, Sa, Sb types with redshift ranging from 0 to 1.2, and the test set of stellarspectra 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 trainingand testing stages than the BPNN (back propagation neural networks), and moreimportantly, it can achieve a good classification accuracy of 99.22% and 96.52%,respectively for stars and normal galaxies.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/48867
Collection中国科学院国家天文台
Affiliation1.中国科学院自动化研究所
2.北京师范大学
3.中国科学院国家天文台
Recommended Citation
GB/T 7714
Dongmei Qin,Ping Guo,Zhanyi Hu,et al. Automated Separation of Stars and Normal Galaxies Based on Statistical Mixture Modeling with RBF Neural Net-works[J]. Chinese Journal of Astronomy and Astrophysics,2003,3(3):277.
APA Dongmei Qin,Ping Guo,Zhanyi Hu,&Yongheng Zhao.(2003).Automated Separation of Stars and Normal Galaxies Based on Statistical Mixture Modeling with RBF Neural Net-works.Chinese Journal of Astronomy and Astrophysics,3(3),277.
MLA Dongmei Qin,et al."Automated Separation of Stars and Normal Galaxies Based on Statistical Mixture Modeling with RBF Neural Net-works".Chinese Journal of Astronomy and Astrophysics 3.3(2003):277.
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