An intuitive 3D map of the Galactic warp's precession traced by classical Cepheids
文献类型：期刊论文
| 作者 | Chen, Xiaodian2; Wang, Shu3; Deng, Licai2,6 ; de Grijs, Richard1,4,5,6; Liu, Chao2; Tian, Hao2
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| 刊名 | NATURE ASTRONOMY
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| 出版日期 | 2019-04-01 |
| 卷号 | 3期号:4页码:320-325 |
| ISSN号 | 2397-3366 |
| DOI | 10.1038/s41550-018-0686-7 |
| 英文摘要 | The Milky Way's neutral hydrogen (Hi) disk is warped and flared(1,2). However, a dearth of accurate H-i-based distances has thus far prevented the development of an accurate Galactic Disk model. Moreover, the extent to which our Galaxy's stellar and gas disk morphologies are mutually consistent is also unclear. Classical Cepheids, primary distance indicators with distance accuracies of 3-5% (ref. (3)), offer a unique opportunity to develop an intuitive and accurate three-dimensional picture. Here, we establish a robust Galactic Disk model based on 1,339 classical Cepheids. We provide strong evidence that the warp's line of nodes is not oriented in the Galactic CentreSun direction. Instead, it subtends a mean angle of 17.5 degrees +/- 1 degrees (formal) +/- 3 degrees (systematic) and exhibits a leading spiral pattern. Our Galaxy thus follows Briggs' rule for spiral galaxies4, which suggests that the origin of the warp is associated with torques forced by the massive inner disk(5). The stellar disk traced by Cepheids follows the gas disk in terms of their amplitudes; the stellar disk extends to at least 20 kpc (refs. (6,7)). This morphology provides a crucial, updated map for studies of the kinematics and archaeology of the Galactic Disk. |
| WOS关键词 | MILKY-WAY ; VARIABLE-STARS ; EXTINCTION ; KINEMATICS ; CATALOG ; REGIONS ; FLARE ; GAIA |
| 资助项目 | National Key Basic Research Program of China[2014CB845700] ; National Natural Science Foundation of China[U1631102] ; National Natural Science Foundation of China[11373010] ; National Natural Science Foundation of China[11633005] ; Initiative Postdocs Support Program[BX201600002] ; China Postdoctoral Science Foundation[2017M610998] ; National Key Research and Development Program of China[2017YFA0402702] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000463774400014 |
| 出版者 | NATURE PUBLISHING GROUP |
| 资助机构 | National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Initiative Postdocs Support Program ; Initiative Postdocs Support Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Initiative Postdocs Support Program ; Initiative Postdocs Support Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Initiative Postdocs Support Program ; Initiative Postdocs Support Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Initiative Postdocs Support Program ; Initiative Postdocs Support Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Key Research and Development Program of China ; National Key Research and Development Program of China |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/26037]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Chen, Xiaodian; Wang, Shu; Deng, Licai |
| 作者单位 | 1.Int Space Sci Inst Beijing, Beijing, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing, Peoples R China 3.Peking Univ, Kavli Inst Astron & Astrophys, Beijing, Peoples R China 4.Macquarie Univ, Dept Phys & Astron, Sydney, NSW, Australia 5.Macquarie Univ, Res Ctr Astron Astrophys & Astrophoton, Sydney, NSW, Australia 6.China West Normal Univ, Dept Astron, Nanchong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Xiaodian,Wang, Shu,Deng, Licai,et al. An intuitive 3D map of the Galactic warp's precession traced by classical Cepheids[J]. NATURE ASTRONOMY,2019,3(4):320-325. |
| APA | Chen, Xiaodian,Wang, Shu,Deng, Licai,de Grijs, Richard,Liu, Chao,&Tian, Hao.(2019).An intuitive 3D map of the Galactic warp's precession traced by classical Cepheids.NATURE ASTRONOMY,3(4),320-325. |
| MLA | Chen, Xiaodian,et al."An intuitive 3D map of the Galactic warp's precession traced by classical Cepheids".NATURE ASTRONOMY 3.4(2019):320-325. |
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来源：国家天文台
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