Kinematics of the Galactic disc from a LAMOST dwarf sample
文献类型：期刊论文
| 作者 | Jing, Yingjie1; Du, Cuihua1; Gu, Jiayin2; Jia, Yunpeng3 ; Peng, Xiyan3; Chen, Yuqin3; Wu, Zhenyu3; Ma, Jun3; Zhou, Xu3; Cao, Zihuang3
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2016-12-01 |
| 卷号 | 463期号:3页码:3390-3397 |
| 关键词 | Galaxy: disc Galaxy: formation Galaxy: kinematics and dynamics Galaxy: structure |
| 英文摘要 | Based on the LAMOST survey and Sloan Digital Sky Survey, we use low-resolution spectra of 130 043 F/G-type dwarf stars to study the kinematics and metallicity properties of the Galactic disc. Our study shows that the stars with poorer metallicity and larger vertical distance from the Galactic plane tend to have a larger eccentricity and velocity dispersion. After separating the sample stars into likely thin-disc and thick-disc sub-samples, we find that there exists a negative gradient of rotation velocity V-phi with metallicity [Fe/H] for the likely thin-disc subsample, and the thick-disc sub-sample exhibits a larger positive gradient of rotation velocity with metallicity. By comparing with model predictions, we consider that the radial migration of stars appears to have influenced the formation of the thin disc. In addition, our results show that the observed thick-disc stellar orbital eccentricity distribution peaks at low eccentricity (e similar to 0.2) and extends to a high eccentricity (e similar to 0.8). We compare this result with four thick-disc formation simulation models, which imply that our result is consistent with the gas-rich merger model. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DIGITAL SKY SURVEY ; MILKY-WAY TOMOGRAPHY ; ROTATION-METALLICITY CORRELATION ; DARK-MATTER UNIVERSE ; GAIA-ESO SURVEY ; THICK-DISK ; SOLAR NEIGHBORHOOD ; ELEMENTAL ABUNDANCE ; DATA RELEASE ; STELLAR KINEMATICS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000393566000088 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8292]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 2.Wuhan Univ Technol, Dept Phys, Wuhan 430000, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ, Nanjing Inst Astron Opt & Technol, Nanjing 210042, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jing, Yingjie,Du, Cuihua,Gu, Jiayin,et al. Kinematics of the Galactic disc from a LAMOST dwarf sample[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,463(3):3390-3397. |
| APA | Jing, Yingjie.,Du, Cuihua.,Gu, Jiayin.,Jia, Yunpeng.,Peng, Xiyan.,...&Zhang, Yong.(2016).Kinematics of the Galactic disc from a LAMOST dwarf sample.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,463(3),3390-3397. |
| MLA | Jing, Yingjie,et al."Kinematics of the Galactic disc from a LAMOST dwarf sample".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 463.3(2016):3390-3397. |
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来源：国家天文台
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