On the Radial Metallicity Gradient and Radial Migration Effect of the Galactic Disk
文献类型：期刊论文
| 作者 | Jia, Yunpeng1,2; Chen, Yuqin1,2; Zhao, Gang1,2; Xue, Xiangxiang2; Zhao, Jingkun2; Yang, Chengqun1,2; Li, Chengdong1,2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2018-08-10 |
| 卷号 | 863期号:1页码:7 |
| 关键词 | Galaxy: abundances Galaxy: disk Galaxy: evolution Galaxy: formation |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aad3bb |
| 英文摘要 | We study the radial metallicity gradient Delta[M/H]/Delta R-g as a function of [Mg/Fe] and vertical bar Z vertical bar with the help of a guiding radius based on the Apache Point Observatory Galactic Evolution Experiment and Gaia and then analyze the radial migration effect on the radial metallicity gradient and metallicity-rotation gradient between the Galactic thin and thick disks. The derived trend of gradient Delta[M/H]/Delta R-g versus [Mg/Fe] shows a transition at [Mg/Fe] similar to 0.18 dex, below which the gradient is negative and varies a little as [Mg/Fe] increases; however, it changes sharply in [Mg/Fe] ranges of 0.16-0.18, above which the gradient increases linearly with increasing [Mg/Fe], being a positive value at [Mg/Fe] greater than or similar to 0.22 dex. These positive gradients in the high-[Mg/Fe] populations are found at vertical bar Z vertical bar < 0.8 kpc, and there are nearly no gradients toward higher vertical bar Z vertical bar. By comparing the metallicity distributions, the radial metallicity gradients Delta[M/H]/Delta R, and the metallicity-rotation gradients between the total sample and Delta R - R-g vertical bar < 2 kpc subsample (or vertical bar R - R-g vertical bar > 2 kpc subsample), we find that, for the thick disk, blurring flattens the gradient Delta[M/H]/Delta R and favors metal-poor high-eccentricity stars. These stars are responsible for the measured positive metallicity-rotation gradient of the thick disk. |
| WOS关键词 | DARK-MATTER UNIVERSE ; THICK DISKS ; MILKY-WAY ; STARS ; KINEMATICS ; EVOLUTION ; GALAXY ; TRENDS ; SDSS ; HALO |
| 资助项目 | National Natural Science Foundation of China[11625313] ; National Natural Science Foundation of China[11573035] ; National Natural Science Foundation of China[11390371] ; Astronomical Big Data Joint Research Center ; Alfred P. Sloan Foundation ; U.S. Department of Energy Office of Science ; Center for High-Performance Computing at the University of Utah |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000441711100002 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; Alfred P. Sloan Foundation ; Alfred P. Sloan Foundation ; U.S. Department of Energy Office of Science ; U.S. Department of Energy Office of Science ; Center for High-Performance Computing at the University of Utah ; Center for High-Performance Computing at the University of Utah ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; Alfred P. Sloan Foundation ; Alfred P. Sloan Foundation ; U.S. Department of Energy Office of Science ; U.S. Department of Energy Office of Science ; Center for High-Performance Computing at the University of Utah ; Center for High-Performance Computing at the University of Utah ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; Alfred P. Sloan Foundation ; Alfred P. Sloan Foundation ; U.S. Department of Energy Office of Science ; U.S. Department of Energy Office of Science ; Center for High-Performance Computing at the University of Utah ; Center for High-Performance Computing at the University of Utah ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; Alfred P. Sloan Foundation ; Alfred P. Sloan Foundation ; U.S. Department of Energy Office of Science ; U.S. Department of Energy Office of Science ; Center for High-Performance Computing at the University of Utah ; Center for High-Performance Computing at the University of Utah |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/22479]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Jia, Yunpeng |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jia, Yunpeng,Chen, Yuqin,Zhao, Gang,et al. On the Radial Metallicity Gradient and Radial Migration Effect of the Galactic Disk[J]. ASTROPHYSICAL JOURNAL,2018,863(1):7. |
| APA | Jia, Yunpeng.,Chen, Yuqin.,Zhao, Gang.,Xue, Xiangxiang.,Zhao, Jingkun.,...&Li, Chengdong.(2018).On the Radial Metallicity Gradient and Radial Migration Effect of the Galactic Disk.ASTROPHYSICAL JOURNAL,863(1),7. |
| MLA | Jia, Yunpeng,et al."On the Radial Metallicity Gradient and Radial Migration Effect of the Galactic Disk".ASTROPHYSICAL JOURNAL 863.1(2018):7. |
入库方式： OAI收割
来源：国家天文台
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