Estimating Atmospheric Parameters of DA White Dwarf Stars with Deep Learning
文献类型：期刊论文
| 作者 | Yang,Yong1,2; Zhao,Jingkun1 ; Zhang,Jiajun1,2; Ye,Xianhao1,2; Zhao,Gang1,2
|
| 刊名 | The Astronomical Journal
 |
| 出版日期 | 2020-10-29 |
| 卷号 | 160期号:5 |
| 关键词 | DA stars Spectroscopy Astronomy data analysis |
| ISSN号 | 0004-6256 |
| DOI | 10.3847/1538-3881/abbdaa |
| 英文摘要 | Abstract The determination of atmospheric parameters of white dwarf stars (WDs) is crucial for researches on them. Traditional methodology is to fit the model spectra to observed absorption lines and report the parameters with the lowest χ2 error, which strongly relies on theoretical models that are not always publicly accessible. In this work, we construct a deep learning network to model-independently estimate and log g of DA stars (DAs), corresponding to WDs with hydrogen-dominated atmospheres. The network is directly trained and tested on the normalized flux pixels of full optical wavelength range of DAs spectroscopically confirmed in the Sloan Digital Sky Survey. Experiments in test yield that the rms error for and log g approaches 900 K and 0.1 dex, respectively. This technique is applicable for those DAs with from 5000 to 40,000 K and log g from 7.0 to 9.0 dex. Furthermore, the applicability of this method is verified for the spectra with degraded resolution of ～200. So it is also practical for the analysis of DAs that will be detected by the Chinese Space Station Telescope. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-6256-160-5-ABBDAA |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/61596]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Zhao,Jingkun |
| 作者单位 | 1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China zjk@bao.ac.cn 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Yang,Yong,Zhao,Jingkun,Zhang,Jiajun,et al. Estimating Atmospheric Parameters of DA White Dwarf Stars with Deep Learning[J]. The Astronomical Journal,2020,160(5). |
| APA | Yang,Yong,Zhao,Jingkun,Zhang,Jiajun,Ye,Xianhao,&Zhao,Gang.(2020).Estimating Atmospheric Parameters of DA White Dwarf Stars with Deep Learning.The Astronomical Journal,160(5). |
| MLA | Yang,Yong,et al."Estimating Atmospheric Parameters of DA White Dwarf Stars with Deep Learning".The Astronomical Journal 160.5(2020). |
入库方式： OAI收割
来源：国家天文台
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