Exploration of SDSS stellar database by AutoClass
文献类型：期刊论文
| 作者 | Yan TaiSheng1,2 ; Zhang YanXia1; Zhao YongHeng1; Li Ji2
|
| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
 |
| 出版日期 | 2011-09-01 |
| 卷号 | 54期号:9页码:1717-1726 |
| 关键词 | data analysis statistical method catalogues surveys star |
| 英文摘要 | AutoClass is an unsupervised Bayesian classification approach which seeks a maximum posterior probability classification for determining the optimal classes in large data sets. Using stellar photometric data from the Sloan Digital Sky Survey (SDSS) data release 7 (DR7), we utilize AutoClass to select non-stellar objects from this sample in order to build a pure stellar sample. For this purpose, the differences between PSF (point spread function) magnitudes and model magnitudes in five wavebands are taken as the input of AutoClass. Through clustering analysis of this sample by AutoClass, 617 non-stellar candidates are found. These candidates are identified by NED and SIMBAD databases. Most of the identified sources (13 from SIMBAD and 28 from NED respectively) are extragalactic sources (e.g., galaxies, HII, radio sources, infrared sources), some are peculiar stars (e.g., supernovas), and very few are normal stars. The extragalactic sources and peculiar stars of the identified objects occupy 94.1%. The result indicates that this method is an effective and robust clustering algorithm to find non-stellar objects and peculiar stars from the total stellar sample. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000293797100022 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8042]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Opt Astron, 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 | Yan TaiSheng,Zhang YanXia,Zhao YongHeng,et al. Exploration of SDSS stellar database by AutoClass[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2011,54(9):1717-1726. |
| APA | Yan TaiSheng,Zhang YanXia,Zhao YongHeng,&Li Ji.(2011).Exploration of SDSS stellar database by AutoClass.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,54(9),1717-1726. |
| MLA | Yan TaiSheng,et al."Exploration of SDSS stellar database by AutoClass".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 54.9(2011):1717-1726. |
入库方式： OAI收割
来源：国家天文台
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