An intuitive 3D map of the Galactic warp's precession traced by classical Cepheids

doi:10.1038/s41550-018-0686-7

CORC > 国家天文台 > 中国科学院国家天文台

	An intuitive 3D map of the Galactic warp's precession traced by classical Cepheids
	Chen, Xiaodian 2; Wang, Shu 3; Deng, Licai 2,6; de Grijs, Richard 1,4,5,6; Liu, Chao 2; Tian, Hao 2
刊名	NATURE ASTRONOMY
	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.
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关键词	MILKY-WAY ; VARIABLE-STARS ; EXTINCTION ; KINEMATICS ; CATALOG ; REGIONS ; FLARE ; GAIA
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000463774400014
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
内容类型	期刊论文
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.