The Study of Galactic Disk Kinematics with SCUSS and SDSS Data
文献类型:期刊论文
作者 | Peng,Xiyan4; Wu,Zhenyu4,5; Qi,Zhaoxiang1,5; Du,Cuihua2; Ma,Jun4,5; Zhou,Xu4; Jia,Yunpeng4; Wang,Songhu3 |
刊名 | Publications of the Astronomical Society of the Pacific |
出版日期 | 2018-05-31 |
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 |
DOI | 10.1088/1538-3873/aac1b5 |
英文摘要 | Abstract 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. |
语种 | 英语 |
出版者 | The Astronomical Society of the Pacific |
WOS记录号 | IOP:0004-6280-130-989-AAC1B5 |
源URL | [http://119.78.226.72/handle/331011/32065] |
专题 | 中国科学院上海天文台 |
作者单位 | 1.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, People's Republic of China 2.School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China 3.Department of Astronomy, Yale University, New Haven, CT 06511, USA 4.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China; xypeng@bao.ac.cn 5.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China |
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). |
入库方式: OAI收割
来源:上海天文台
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