NAOC Open IR
twonovelapproachesforphotometricredshiftestimationbasedonsdssand2mass
Dan Wang; YanXia Zhang; Chao Liu; YongHeng Zhao
2008
Source Publicationchineseastronomyandastrophysics
ISSN0275-1062
Volume8Issue:1Pages:119
AbstractWe investigate two training-set methods: support vector machines (SVMs) and Kernel Regression (KR) for photometric redshift estimation with the data from the databases of Sloan Digital Sky Survey Data Release 5 and Two Micron All Sky Survey. We probe the performances of SVMs and KR for different input patterns. Our experiments show that with more parameters considered, the accuracy does not always increase, and only when appropriate parameters are chosen, the accuracy can improve. For different approaches, the best input pattern is different. With different parameters as input, the optimal bandwidth is dissimilar for KR. The rms errors of photometric redshifts based on SVM and KR methods are less than 0.03 and 0.02, respectively. Strengths and weaknesses of the two approaches are summarized. Compared to other methods of estimating photometric redshifts, they show their superiorities, especially KR, in terms of accuracy.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/53437
Collection中国科学院国家天文台
Affiliation中国科学院国家天文台
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Dan Wang,YanXia Zhang,Chao Liu,et al. twonovelapproachesforphotometricredshiftestimationbasedonsdssand2mass[J]. chineseastronomyandastrophysics,2008,8(1):119.
APA Dan Wang,YanXia Zhang,Chao Liu,&YongHeng Zhao.(2008).twonovelapproachesforphotometricredshiftestimationbasedonsdssand2mass.chineseastronomyandastrophysics,8(1),119.
MLA Dan Wang,et al."twonovelapproachesforphotometricredshiftestimationbasedonsdssand2mass".chineseastronomyandastrophysics 8.1(2008):119.
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