STATISTICAL STUDY OF 2XMMi-DR3/SDSS-DR8 CROSS-CORRELATION SAMPLE
文献类型：期刊论文
| 作者 | Zhang, Yan-Xia1 ; Zhou, Xin-Lin1; Zhao, Yong-Heng1; Wu, Xue-Bing2
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2013-02-01 |
| 卷号 | 145期号:2 |
| 关键词 | catalogs surveys X-rays: diffuse background X-rays: galaxies X-rays: stars |
| 英文摘要 | Cross-correlating the XMM-Newton 2XMMi-DR3 catalog with the Sloan Digital Sky Survey (SDSS) Data Release 8, we obtain one of the largest X-ray/optical catalogs and explore the distribution of various classes of X-ray emitters in the multidimensional photometric parameter space. Quasars and galaxies occupy different zones while stars scatter in them. However, X-ray active stars have a certain distributing rule according to spectral types. The earlier the type of stars, the stronger its X-ray emitting. X-ray active stars have a similar distribution to most stars in the g - r versus r - i diagram. Based on the identified samples with SDSS spectral classification, a random forest algorithm for automatic classification is performed. The result shows that the classification accuracy of quasars and galaxies adds up to more than 93.0% while that of X-ray emitting stars only amounts to 45.3%. In other words, it is easy to separate quasars and galaxies, but it is difficult to discriminate X-ray active stars from quasars and galaxies. If we want to improve the accuracy of automatic classification, it is necessary to increase the number of X-ray emitting stars, since the majority of X-ray emitting sources are quasars and galaxies. The results obtained here will be used for the optical spectral survey performed by the Large sky Area Multi-Object fiber Spectroscopic Telescope (LAMOST, also named the Guo Shou Jing Telescope), which is a Chinese national scientific research facility operated by the National Astronomical Observatories, Chinese Academy of Sciences. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000313571600016 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5924]  |
| 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.Peking Univ, Dept Astron, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yan-Xia,Zhou, Xin-Lin,Zhao, Yong-Heng,et al. STATISTICAL STUDY OF 2XMMi-DR3/SDSS-DR8 CROSS-CORRELATION SAMPLE[J]. ASTRONOMICAL JOURNAL,2013,145(2). |
| APA | Zhang, Yan-Xia,Zhou, Xin-Lin,Zhao, Yong-Heng,&Wu, Xue-Bing.(2013).STATISTICAL STUDY OF 2XMMi-DR3/SDSS-DR8 CROSS-CORRELATION SAMPLE.ASTRONOMICAL JOURNAL,145(2). |
| MLA | Zhang, Yan-Xia,et al."STATISTICAL STUDY OF 2XMMi-DR3/SDSS-DR8 CROSS-CORRELATION SAMPLE".ASTRONOMICAL JOURNAL 145.2(2013). |
入库方式： OAI收割
来源：国家天文台
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