Estimating photometric redshifts with artificial neural networks and multi-parameters
文献类型：期刊论文
| 作者 | Li, Li-Li; Zhang, Yan-Xia ; Zhao, Yong-Heng; Yang, Da-Wei
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| 刊名 | CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2007 |
| 卷号 | 7期号:3页码:448-456 |
| 关键词 | galaxies : fundamental parameters techniques : photometric method : data analysis |
| 英文摘要 | We calculate photometric redshifts from the Sloan Digital Sky Survey Data Release 2 (SDSS DR2) Galaxy Sample using artificial neural networks (ANNs). Different input sets based on various parameters (e.g. magnitude, color index, flux information) are explored. Mainly, parameters from broadband photometry are utilized and their performances in red-shift prediction are compared. While any parameter may be easily incorporated in the input, our results indicate that using the dereddened magnitudes often produces more accurate photometric redshifts than using the Petrosian magnitudes or model magnitudes as input, but the model magnitudes are superior to the Petrosian magnitudes. Also, better performance results when more effective parameters are used in the training set. The method is tested on a sample of 79 346 galaxies from the SDSS DR2. When using 19 parameters based on the dereddened magnitudes, the rms error in redshift estimation is sigma(z) = 0.020184. The ANN is highly competitive tool compared to the traditional template-fitting methods when a large and representative training set is available. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000247553300016 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7891]  |
| 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.Hebei Normal Univ, Coll Phys Sci & Informat Engn, Shijiazhuang 050016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Li-Li,Zhang, Yan-Xia,Zhao, Yong-Heng,et al. Estimating photometric redshifts with artificial neural networks and multi-parameters[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2007,7(3):448-456. |
| APA | Li, Li-Li,Zhang, Yan-Xia,Zhao, Yong-Heng,&Yang, Da-Wei.(2007).Estimating photometric redshifts with artificial neural networks and multi-parameters.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,7(3),448-456. |
| MLA | Li, Li-Li,et al."Estimating photometric redshifts with artificial neural networks and multi-parameters".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 7.3(2007):448-456. |
入库方式： OAI收割
来源：国家天文台
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