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The Study of Galactic Disk Kinematics with SCUSS and SDSS Data

文献类型：期刊论文

作者Peng, Xiyan1; Wu, Zhenyu1,2; Qi, Zhaoxiang2,3; Du, Cuihua4; Ma, Jun1,2; Zhou, Xu1; Jia, Yunpeng1; Wang, Songhu5
刊名PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
出版日期2018-07-01
卷号130期号:989
ISSN号0004-6280
关键词Galaxy: Abundances Galaxy: Disk Galaxy: Evolution Galaxy: Formation Galaxy: Kinematics And Dynamics Galaxy: Structure
DOI10.1088/1538-3873/aac1b5
英文摘要We derive chemical and kinematics properties of G and K dwarfs from the SCUSS and SDSS data. We aim to characterize and explore the properties of the Galactic disk in order to understand their origins and evolutions. A kinematics approach is used to separate Galactic stellar populations into the likely thin disk and thick disk sample. Then, we explore rotational velocity gradients with metallicity of the Galactic disks to provide constraints on the various formation models. We identify a negative gradient of the rotational velocity of the thin disk stars with [Fe/H], -18.2. +/-. 2.3 km s(-1) dex(-1). For the thick disk, we identify a positive gradient of the rotational velocity with [Fe/H], 41.7. +/-. 6.1 km s(-1) dex(-1). The eccentricity does not change with metallicity for the thin disk sample. Thick disk stars exhibit a trend of orbital eccentricity with metallicity (-0.13 dex(-1)). The thin disk shows a negative metallicity gradient with Galactocentric radial distance R, while the thick disk shows a flat radial metallicity gradient. Our results suggest that radial migration may play an important role in the formation and evolution of the thin disk.
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000433959600001
源URL[http://119.78.226.72/handle/331011/32293]  
专题中国科学院上海天文台
通讯作者Peng, Xiyan
作者单位1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 101408, Peoples R China
3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
5.Yale Univ, Dept Astron, New Haven, CT 06511 USA
推荐引用方式
GB/T 7714		 Peng, Xiyan,Wu, Zhenyu,Qi, Zhaoxiang,et al. The Study of Galactic Disk Kinematics with SCUSS and SDSS Data[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2018,130(989).
APA Peng, Xiyan.,Wu, Zhenyu.,Qi, Zhaoxiang.,Du, Cuihua.,Ma, Jun.,...&Wang, Songhu.(2018).The Study of Galactic Disk Kinematics with SCUSS and SDSS Data.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,130(989).
MLA Peng, Xiyan,et al."The Study of Galactic Disk Kinematics with SCUSS and SDSS Data".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 130.989(2018).

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来源：上海天文台

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