A TEST FOR RADIAL MIXING USING LOCAL STAR SAMPLES

	A TEST FOR RADIAL MIXING USING LOCAL STAR SAMPLES
	Yu, Jincheng 1,2; Sellwood, J. A.3; Pryor, Carlton 3; Chen, Li1 ; Hou, Jinliang1
刊名	ASTROPHYSICAL JOURNAL
	2012-08-01
卷号	754 期号:2 页码:124
关键词	galaxies: kinematics and dynamics stars: abundances
英文摘要	We use samples of local main-sequence stars to show that the radial gradient of [Fe/H] in the thin disk of the Milky Way decreases with mean effective stellar temperature. Many of these stars are visiting the solar neighborhood from the inner and outer Galaxy. We use the angular momentum of each star about the Galactic center to determine the guiding center radius and to eliminate the effects of epicyclic motion, which would otherwise blur the estimated gradients. We interpret the effective temperature as a proxy for mean age, and conclude that the decreasing gradient is consistent with the predictions of radial mixing due to transient spiral patterns. We find some evidence that the trend of decreasing gradient with increasing mean age breaks to a constant gradient for samples of stars whose main-sequence lifetimes exceed the likely age of the thin disk.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	GENEVA-COPENHAGEN SURVEY ; VELOCITY EXPERIMENT RAVE ; DIGITAL SKY SURVEY ; MILKY-WAY DISK ; SOLAR NEIGHBORHOOD ; ABUNDANCE GRADIENT ; CHEMICAL EVOLUTION ; G-DWARF ; GALACTIC DISCS ; DATA RELEASE
收录类别	SCI
语种	英语
WOS记录号	WOS:000306666700045
公开日期	2015-01-27
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/15451]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA
推荐引用方式 GB/T 7714	Yu, Jincheng,Sellwood, J. A.,Pryor, Carlton,et al. A TEST FOR RADIAL MIXING USING LOCAL STAR SAMPLES[J]. ASTROPHYSICAL JOURNAL,2012,754(2):124.
APA	Yu, Jincheng,Sellwood, J. A.,Pryor, Carlton,Chen, Li,&Hou, Jinliang.(2012).A TEST FOR RADIAL MIXING USING LOCAL STAR SAMPLES.ASTROPHYSICAL JOURNAL,754(2),124.
MLA	Yu, Jincheng,et al."A TEST FOR RADIAL MIXING USING LOCAL STAR SAMPLES".ASTROPHYSICAL JOURNAL 754.2(2012):124.