Mapping the Galactic disc with the LAMOST and Gaia red clump sample: II. 3D asymmetrical kinematics of mono-age populations in the disc between 6-14 kpc
文献类型:期刊论文
作者 | Wang, H-F1,2; Lopez-Corredoira, M.3,4; Huang, Y.1; Carlin, J. L.5; Chen, B-Q1; Wang, C.6,7; Chang, J.8,9; Zhang, H-W6,7; Xiang, M-S8,10; Yuan, H-B11 |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
出版日期 | 2020 |
卷号 | 491期号:2页码:2104-2118 |
ISSN号 | 0035-8711 |
关键词 | Galaxy: disc Galaxy: kinematics and dynamics Galaxy: structure |
DOI | 10.1093/mnras/stz3113 |
英文摘要 | We perform analysis of the 3D kinematics of Milky Way disc stars in mono-age populations. We focus on stars between Galactocentric distances of R = 6 and 14 kpc, selected from the combined LAMOST Data Release 4 (DR4) red clump giant stars and Gaia DR2 proper motion catalogue. We confirm the 3D asymmetrical motions of recent works and provide time tagging of the Galactic outer disc asymmetrical motions near the anticentre direction out to Galactocentric distances of 14 kpc. Radial Galactocentric motions reach values up to 10 km s(-1), depending on the age of the population, and present a north-south asymmetry in the region corresponding to density and velocity substructures that were sensitive to the perturbations in the early 6 Gyr. After that time, the disc stars in this asymmetrical structure have become kinematically hotter, and are thus not sensitive to perturbations, and we find the structure is a relatively younger population. With quantitative analysis, we find stars both above and below the plane at R greater than or similar to 9 kpc that exhibit bending mode motions of which the sensitive duration is around 8 Gyr. We speculate that the in-plane asymmetries might not be mainly caused by a fast rotating bar, intrinsically elliptical outer disc, secular expansion of the disc, or streams. Spiral arm dynamics, out-of-equilibrium models, minor mergers or others are important contributors. Vertical motions might be dominated by bending and breathing modes induced by complicated inner or external perturbers. It is likely that many of these mechanisms are coupled together. |
WOS关键词 | GIANT BRANCH STARS ; MILKY-WAY DISC ; VELOCITY DISTRIBUTION ; SOLAR NEIGHBORHOOD ; ANGULAR-MOMENTUM ; MINOR MERGERS ; PATTERN SPEED ; SPIRAL ARMS ; LOCAL DISC ; STELLAR |
资助项目 | National Key Basic Research Program of China[SQ2019YFA040021] ; China Postdoctoral Science Foundation[2019M653504] ; Yunnan province postdoctoral Directed culture fundation ; Spanish Ministry of Economy and Competitiveness (MINECO)[PGC-2018-102249-B100] ; U.S. National Science Foundation[AST-1816196] ; National Natural Science Foundation of China[U1531244] ; National Natural Science Foundation of China[11833006] ; National Natural Science Foundation of China[11811530289] ; National Natural Science Foundation of China[U1731108] ; National Natural Science Foundation of China[11803029] ; National Natural Science Foundation of China[11903027] ; Yunnan University[C176220100006] ; Yunnan University[C176220100007] ; National Development and Reform Commission ; Special Funding for Advanced Users ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; LAMOST Fellow project |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000512302100043 |
资助机构 | National Key Basic Research Program of China ; National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Yunnan province postdoctoral Directed culture fundation ; Yunnan province postdoctoral Directed culture fundation ; Spanish Ministry of Economy and Competitiveness (MINECO) ; Spanish Ministry of Economy and Competitiveness (MINECO) ; U.S. National Science Foundation ; U.S. National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Yunnan University ; Yunnan University ; National Development and Reform Commission ; National Development and Reform Commission ; Special Funding for Advanced Users ; Special Funding for Advanced Users ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; LAMOST Fellow project ; LAMOST Fellow project ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Yunnan province postdoctoral Directed culture fundation ; Yunnan province postdoctoral Directed culture fundation ; Spanish Ministry of Economy and Competitiveness (MINECO) ; Spanish Ministry of Economy and Competitiveness (MINECO) ; U.S. National Science Foundation ; U.S. National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Yunnan University ; Yunnan University ; National Development and Reform Commission ; National Development and Reform Commission ; Special Funding for Advanced Users ; Special Funding for Advanced Users ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; LAMOST Fellow project ; LAMOST Fellow project ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Yunnan province postdoctoral Directed culture fundation ; Yunnan province postdoctoral Directed culture fundation ; Spanish Ministry of Economy and Competitiveness (MINECO) ; Spanish Ministry of Economy and Competitiveness (MINECO) ; U.S. National Science Foundation ; U.S. National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Yunnan University ; Yunnan University ; National Development and Reform Commission ; National Development and Reform Commission ; Special Funding for Advanced Users ; Special Funding for Advanced Users ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; LAMOST Fellow project ; LAMOST Fellow project ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Yunnan province postdoctoral Directed culture fundation ; Yunnan province postdoctoral Directed culture fundation ; Spanish Ministry of Economy and Competitiveness (MINECO) ; Spanish Ministry of Economy and Competitiveness (MINECO) ; U.S. National Science Foundation ; U.S. National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Yunnan University ; Yunnan University ; National Development and Reform Commission ; National Development and Reform Commission ; Special Funding for Advanced Users ; Special Funding for Advanced Users ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; LAMOST Fellow project ; LAMOST Fellow project |
源URL | [http://ir.bao.ac.cn/handle/114a11/54264] |
专题 | 中国科学院国家天文台 |
通讯作者 | Wang, H-F |
作者单位 | 1.Yunnan Univ, South Western Inst Astron Res, Kunming 650500, Yunnan, Peoples R China 2.China West Normal Univ, Dept Astron, Nanchong 637009, Peoples R China 3.Inst Astrofis Canarias, E-38205 Tenerife, Spain 4.Univ La Laguna, Dept Astrofis, E-38206 San Cristobal la Laguna, Spain 5.LSST, 950 North Cherry Ave, Tucson, AZ 85719 USA 6.Peking Univ, Dept Astron, Beijing 100871, Peoples R China 7.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 8.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 9.Purple Mt Observ, Partner Grp MPI Astron, 2 West Beijing Rd, Nanjing 210008, Peoples R China 10.Max Planck Inst Astron, D-69117 Heidelberg, Germany |
推荐引用方式 GB/T 7714 | Wang, H-F,Lopez-Corredoira, M.,Huang, Y.,et al. Mapping the Galactic disc with the LAMOST and Gaia red clump sample: II. 3D asymmetrical kinematics of mono-age populations in the disc between 6-14 kpc[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,491(2):2104-2118. |
APA | Wang, H-F.,Lopez-Corredoira, M..,Huang, Y..,Carlin, J. L..,Chen, B-Q.,...&Deng, L-C.(2020).Mapping the Galactic disc with the LAMOST and Gaia red clump sample: II. 3D asymmetrical kinematics of mono-age populations in the disc between 6-14 kpc.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,491(2),2104-2118. |
MLA | Wang, H-F,et al."Mapping the Galactic disc with the LAMOST and Gaia red clump sample: II. 3D asymmetrical kinematics of mono-age populations in the disc between 6-14 kpc".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 491.2(2020):2104-2118. |
入库方式: OAI收割
来源:国家天文台
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