Correction to the Photometric Colors of the Gaia Data Release 2 with the Stellar Color Regression Method
文献类型：期刊论文
| 作者 | Niu,Zexi2; Yuan,Haibo1; Liu,Jifeng2
|
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2021-03-01 |
| 卷号 | 909期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | Stellar photometry Astronomy data analysis Fundamental parameters of stars |
| DOI | 10.3847/1538-4357/abdbac |
| 英文摘要 | Abstract The second Gaia data release (DR2) delivers accurate and homogeneous photometry data of the whole sky of an exquisite quality, reaching down to the unprecedented millimagnitude (mmag) level for the G, G RP, and G BP passbands. However, the presence of magnitude-dependent systematic effects at the 10 mmag level limits its power in scientific exploitation. In this work, using about a half million stars in common with the LAMOST DR5, we apply the spectroscopy-based stellar color regression method to calibrate the Gaia G ? G RP and G BP ? G RP colors. With an unprecedented precision of about 1 mmag, systematic trends with G magnitude are revealed for both colors in great detail, reflecting changes in instrument configurations. Color-dependent trends are found for the G BP ? G RP color and for stars brighter than G ～ 11.5 mag. The maximum correction term of the calibration is about 20 mmag in general and varies by a few mmag/mag. A revised color–color diagram of Gaia DR2 is given, and some applications are briefly discussed. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-909-1-ABDBAC |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/58021]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Department of astronomy, Beijing Normal University, 19th Xinjiekouwai Street, Haidian District, Beijing, People's Republic of China; yuanhb@bnu.edu.cn 2.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Niu,Zexi,Yuan,Haibo,Liu,Jifeng. Correction to the Photometric Colors of the Gaia Data Release 2 with the Stellar Color Regression Method[J]. The Astrophysical Journal,2021,909(1). |
| APA | Niu,Zexi,Yuan,Haibo,&Liu,Jifeng.(2021).Correction to the Photometric Colors of the Gaia Data Release 2 with the Stellar Color Regression Method.The Astrophysical Journal,909(1). |
| MLA | Niu,Zexi,et al."Correction to the Photometric Colors of the Gaia Data Release 2 with the Stellar Color Regression Method".The Astrophysical Journal 909.1(2021). |
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来源：国家天文台
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