Morphology classification and photometric redshift measurement of galaxies
文献类型：期刊论文
| 作者 | Zhang, Yanxia1 ; Li, Lili1,2; Zhao, Yongheng1
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2009 |
| 卷号 | 392期号:1页码:233-239 |
| 关键词 | techniques: photometric catalogues surveys galaxies: distances and redshifts galaxies: general galaxies: photometry |
| 英文摘要 | Based on the Sloan Digital Sky Survey Data Release 5 Galaxy Sample, we explore photometric morphology classification and redshift estimation of galaxies using photometric data and known spectroscopic redshifts. An unsupervised method, k-means algorithm, is used to separate the whole galaxy sample into early- and late-type galaxies. Then, we investigate the photometric redshift measurement with different input patterns by means of artificial neural networks (ANNs) for the total sample and two subsamples. The experimental result indicates that ANNs show better performance when more parameters are applied in the training set, and the mixed accuracy sigma(mix)= root sigma(2)(searly)+s sigma(2)(late) of photometric redshift estimation for the two subsets is superior to sigma(z) for the overall sample alone. For the optimal result, the rms deviation of photometric redshifts for the mixed sample amounts to 0.0192, that for the overall sample is 0.0196, meanwhile, that for early- and late-type galaxies adds up to 0.0164 and 0.0217, respectively. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000262302700014 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7480]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Weishanlu Middle Sch, Tianjin 300222, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yanxia,Li, Lili,Zhao, Yongheng. Morphology classification and photometric redshift measurement of galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2009,392(1):233-239. |
| APA | Zhang, Yanxia,Li, Lili,&Zhao, Yongheng.(2009).Morphology classification and photometric redshift measurement of galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,392(1),233-239. |
| MLA | Zhang, Yanxia,et al."Morphology classification and photometric redshift measurement of galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 392.1(2009):233-239. |
入库方式： OAI收割
来源：国家天文台
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