Gaia EDR3 Parallax Zero-point Offset Based on W Ursae Majoris-type Eclipsing Binaries
文献类型：期刊论文
| 作者 | Ren,Fangzhou2,5; Chen,Xiaodian3,4,8; Zhang,Huawei2,5; de Grijs,Richard6,7; Deng,Licai3,4,8 ; Huang,Yang1
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| 刊名 | The Astrophysical Journal Letters
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| 出版日期 | 2021-04-01 |
| 卷号 | 911期号:2 |
| 关键词 | Parallax Eclipsing binary stars W Ursae Majoris variable stars Catalogs the Milky Way Close binary stars |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/abf359 |
| 英文摘要 | Abstract We independently determine the zero-point offset of the Gaia early Data Release-3 (EDR3) parallaxes based on ～110,000 W Ursae Majoris (EW)-type eclipsing binary systems. EWs cover almost the entire sky and are characterized by a relatively complete coverage in magnitude and color. They are an excellent proxy for Galactic main-sequence stars. We derive a W1-band period–luminosity relation with a distance accuracy of 7.4%, which we use to anchor the Gaia parallax zero-point. The final, global parallax offsets are ?28.6 ± 0.6 μas and ?25.4 ± 4.0 μas (before correction) and 4.2 ± 0.5 μas and 4.6 ± 3.7 μas (after correction) for the five- and six-parameter solutions, respectively. The total systematic uncertainty is 1.8 μas. The spatial distribution of the parallax offsets shows that the bias in the corrected Gaia EDR3 parallaxes is less than 10 μas across 40% of the sky. Only 15% of the sky is characterized by a parallax offset greater than 30 μas. Thus, we have provided independent evidence that the parallax zero-point correction provided by the Gaia team significantly reduces the prevailing bias. Combined with literature data, we find that the overall Gaia EDR3 parallax offsets for Galactic stars are [?20, ?30] μas and 4–10 μas, respectively, before and after correction. For specific regions, an additional deviation of about 10 μas is found. |
| 语种 | 英语 |
| WOS记录号 | IOP:2041-8205-911-2-ABF359 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/59604]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Ren,Fangzhou |
| 作者单位 | 1.South-Western Institute for Astronomy Research, Yunnan University, Kunming 650500, People’s Republic of China 2.Kavli Institute for Astronomy and Astrophysics, Peking University, Yi He Yuan Lu 5, Hai Dian District, Beijing 100871, People’s Republic of China 3.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China chenxiaodian@nao.cas.cn 4.School of Astronomy and Space Science, University of the Chinese Academy of Sciences, Beijing 101408, People’s Republic of China 5.Department of Astronomy, School of Physics, Peking University, Yi He Yuan Lu 5, Hai Dian District, Beijing 100871, People’s Republic of China renfz@pku.edu.cn 6.Department of Physics and Astronomy, Macquarie University, Balaclava Road, Sydney, NSW 2109, Australia 7.Research Centre for Astronomy, Astrophysics and Astrophotonics, Macquarie University, Balaclava Road, Sydney, NSW 2109, Australia 8.Department of Astronomy, China West Normal University, Nanchong, 637009, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Ren,Fangzhou,Chen,Xiaodian,Zhang,Huawei,et al. Gaia EDR3 Parallax Zero-point Offset Based on W Ursae Majoris-type Eclipsing Binaries[J]. The Astrophysical Journal Letters,2021,911(2). |
| APA | Ren,Fangzhou,Chen,Xiaodian,Zhang,Huawei,de Grijs,Richard,Deng,Licai,&Huang,Yang.(2021).Gaia EDR3 Parallax Zero-point Offset Based on W Ursae Majoris-type Eclipsing Binaries.The Astrophysical Journal Letters,911(2). |
| MLA | Ren,Fangzhou,et al."Gaia EDR3 Parallax Zero-point Offset Based on W Ursae Majoris-type Eclipsing Binaries".The Astrophysical Journal Letters 911.2(2021). |
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