The Study of Galactic Disk Kinematics with SCUSS and SDSS Data

doi:10.1088/1538-3873/aac1b5

CORC > 国家天文台 > 中国科学院国家天文台

	The Study of Galactic Disk Kinematics with SCUSS and SDSS Data
	Peng,Xiyan 1; Wu,Zhenyu 1,2; Qi,Zhaoxiang 2,3; Du,Cuihua 4; Ma,Jun 1,2; Zhou,Xu 1; Jia,Yunpeng 1; Wang,Songhu 5
刊名	Publications of the Astronomical Society of the Pacific
	2018-05-31
卷号	130 期号:989
关键词	Galaxy: abundances Galaxy: disk Galaxy: evolution Galaxy: formation Galaxy: kinematics and dynamics Galaxy: structure
ISSN号	0004-6280
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
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/21753]
专题	中国科学院国家天文台
作者单位	1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China; xypeng@bao.ac.cn 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China 3.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, People's Republic of China 4.School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China 5.Department of Astronomy, Yale University, 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).