Testing Deep Learning for Deriving Stellar Atmospheric Parameters with Extended MILES Library
文献类型：期刊论文
| 作者 | Wang,Qi-Xun1,2; Zhao,Gang1,2 ; Fan,Zhou1; Li,Cheng-Dong1,2; Zhao,Jingkun1; Tan,Kefeng1
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| 刊名 | Publications of the Astronomical Society of the Pacific
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| 出版日期 | 2019-07-01 |
| 卷号 | 131期号:1002 |
| 关键词 | methods: data analysis stars: fundamental parameters techniques: photometric |
| ISSN号 | 0004-6280 |
| DOI | 10.1088/1538-3873/ab2207 |
| 英文摘要 | Abstract The stellar atmospheric parameters Teff, log g , and [Fe/H] are important physical parameters. However, there are different ways to derive them using both spectroscopy and photometry. In this work, the extended MILES library has been convolved with the uvgri-band transmission of the Stellar Abundance and Galaxy Evolution Survey (SAGES), which aims to derive the stellar atmospheric parameters of 0.5 billion stars from observations. With the convolved SAGES magnitudes and MILES library, we examine the errors and stability of deep learning for deriving the stellar atmospheric parameters. The basic idea of our approach is to take photometric data such as images and train a deep neural network (DNN) with densely connected convolutional structure, which is widely used in the field of computer vision. Using this technique, stellar atmospheric parameters can be derived. Increasing the depth of the DNN makes it more difficult to train the DNN, but the dense connected convolutional structure can be a good solution to the gradient dispersion. Finally, we evaluate the performance of the proposed scheme with photometric data. Our method, trained by photometric data of only 483 stars, reduces the rms of Teff, log g and [Fe/H] to 74 K, 0.11 dex and 0.06 dex, respectively in training and 110 K, 0.289 dex and 0.211 dex, respectively, in testing. It is worth noting that our method can directly calculate Teff, log g and [Fe/H] continuously in range of ～4000–7000 K, ～2.0–5.0 dex and ～?2.0–0.5 dex, respectively, rather than piecewise calculating the stellar atmospheric parameters in different stellar types and colors. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-6280-131-1002-AB2207 |
| 出版者 | The Astronomical Society of the Pacific |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/27139]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China gzhao@nao.cas.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 | Wang,Qi-Xun,Zhao,Gang,Fan,Zhou,et al. Testing Deep Learning for Deriving Stellar Atmospheric Parameters with Extended MILES Library[J]. Publications of the Astronomical Society of the Pacific,2019,131(1002). |
| APA | Wang,Qi-Xun,Zhao,Gang,Fan,Zhou,Li,Cheng-Dong,Zhao,Jingkun,&Tan,Kefeng.(2019).Testing Deep Learning for Deriving Stellar Atmospheric Parameters with Extended MILES Library.Publications of the Astronomical Society of the Pacific,131(1002). |
| MLA | Wang,Qi-Xun,et al."Testing Deep Learning for Deriving Stellar Atmospheric Parameters with Extended MILES Library".Publications of the Astronomical Society of the Pacific 131.1002(2019). |
入库方式： OAI收割
来源：国家天文台
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