searchforcarbonstarsanddzwhitedwarfsinsdssspectrasurveythroughmachinelearning
文献类型：期刊论文
| 作者 | Si Jianmin2; Luo Ali1 ; Li Yinbi1; Zhang Jiannan1; Wei Peng1; Wu Yihong2; Wu Fuchao2; Zhao Yongheng1
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| 刊名 | sciencechinaphysicsmechanicsastronomy
 |
| 出版日期 | 2014 |
| 卷号 | 57期号:1页码:176 |
| ISSN号 | 1674-7348 |
| 英文摘要 | Carbon stars and DZ white dwarfs are two types of rare objects in the Galaxy. In this paper, we have applied the label propagation algorithm to search for these two types of stars from Data Release Eight (DR8) of the Sloan Digital Sky Survey (SDSS), which is verified to be efficient by calculating precision and recall. From nearly two million spectra including stars, galaxies and QSOs, we have found 260 new carbon stars in which 96 stars have been identified as dwarfs and 7 identified as giants, and 11 composition spectrum systems (each of them consists of a white dwarf and a carbon star). Similarly, using the label propagation method, we have obtained 29 new DZ white dwarfs from SDSS DR8. Compared with PCA reconstructed spectra, the 29 findings are typical DZ white dwarfs. We have also investigated their proper motions by comparing them with proper motion distribution of 9,374 white dwarfs, and found that they satisfy the current observed white dwarfs by SDSS generally have large proper motions. In addition, we have estimated their effective temperatures by fitting the polynomial relationship between effective temperature and g-r color of known DZ white dwarfs, and found 12 of the 29 new DZ white dwarfs are cool, in which nine are between 6,000 K and 6,600 K, and three are below 6,000 K. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/42679]  |
| 专题 | 光学部_LAMOST运行和发展中心 |
| 作者单位 | 1.中国科学院国家天文台 2.中国科学院自动化研究所 |
| 推荐引用方式 GB/T 7714 | Si Jianmin,Luo Ali,Li Yinbi,et al. searchforcarbonstarsanddzwhitedwarfsinsdssspectrasurveythroughmachinelearning[J]. sciencechinaphysicsmechanicsastronomy,2014,57(1):176. |
| APA | Si Jianmin.,Luo Ali.,Li Yinbi.,Zhang Jiannan.,Wei Peng.,...&Zhao Yongheng.(2014).searchforcarbonstarsanddzwhitedwarfsinsdssspectrasurveythroughmachinelearning.sciencechinaphysicsmechanicsastronomy,57(1),176. |
| MLA | Si Jianmin,et al."searchforcarbonstarsanddzwhitedwarfsinsdssspectrasurveythroughmachinelearning".sciencechinaphysicsmechanicsastronomy 57.1(2014):176. |
入库方式： OAI收割
来源：国家天文台
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