The Lin Shu type density wave structure of the Galaxy: Line-of-sight velocities of selected 37354 RAVE DR5 stars

doi:10.1016/j.newast.2018.07.003

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	The Lin Shu type density wave structure of the Galaxy: Line-of-sight velocities of selected 37354 RAVE DR5 stars
	Griv, Evgeny 1; Jiang, Ing-Guey 2; Hou, Li-Gang 3; Ngeow, Chow-Choong 4
刊名	NEW ASTRONOMY
	2019
卷号	66 页码:1-8
关键词	Galaxy: kinematics and dynamics Galaxy: structure Galaxies: spiral
ISSN号	1384-1076
DOI	10.1016/j.newast.2018.07.003
英文摘要	We exploit information, including velocities from the fifth data release of the RAdial Velocity Experiment (RAVE), to find evidence of the Lin-Shu type tightly wound spiral density waves in the nearby Galactic disk. The Kunder et al. (2017) catalogue of 471117 stars with derived spectrophotometric distances and line-of-sight velocities are explored to find the geometry and parameters of the velocity field in the extended solar neigh-borhood. Possible existence of noncircular systematic motions of selected 37,354 disk objects within 2 kpc from the Sun and 500 pc from the Galactic mid-plane together with the ordinary differential rotation are assumed. Both the pitch angle of spiral arms and the spatial location of the Sun within the density-wave pattern and the deviations of the motion of objects from the circular motion are calculated by fitting the stellar line-of-sight velocities in RAVE DR5 with the simplest linear perturbation density-wave model. Two radial wavelengths of the wave pattern of about 0.5 kpc and 1.5 kpc in the solar vicinity are found. We argue that the spiral structure of the Galaxy has an oscillating nature corresponding to a concept of the fairly unstable, low amplitude, tightly wound, and rigidly rotating density waves.
资助项目	Ministry of Science and Technology in Taiwan ; Israel Science Foundation ; Binational U.S.-Israel Science Foundation ; Israeli Ministry of Immigrant Absorption ; National Natural Science Foundation of China[11503033]
WOS关键词	MILKY-WAY-GALAXY ; SPIRAL STRUCTURE ; DISK GALAXIES ; OPEN CLUSTERS ; ROTATION CURVE ; OWN GALAXY ; KINEMATICS ; ARMS ; AGE ; HYDROGEN
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000447477900001
资助机构	Ministry of Science and Technology in Taiwan ; Ministry of Science and Technology in Taiwan ; Israel Science Foundation ; Israel Science Foundation ; Binational U.S.-Israel Science Foundation ; Binational U.S.-Israel Science Foundation ; Israeli Ministry of Immigrant Absorption ; Israeli Ministry of Immigrant Absorption ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology in Taiwan ; Ministry of Science and Technology in Taiwan ; Israel Science Foundation ; Israel Science Foundation ; Binational U.S.-Israel Science Foundation ; Binational U.S.-Israel Science Foundation ; Israeli Ministry of Immigrant Absorption ; Israeli Ministry of Immigrant Absorption ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology in Taiwan ; Ministry of Science and Technology in Taiwan ; Israel Science Foundation ; Israel Science Foundation ; Binational U.S.-Israel Science Foundation ; Binational U.S.-Israel Science Foundation ; Israeli Ministry of Immigrant Absorption ; Israeli Ministry of Immigrant Absorption ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology in Taiwan ; Ministry of Science and Technology in Taiwan ; Israel Science Foundation ; Israel Science Foundation ; Binational U.S.-Israel Science Foundation ; Binational U.S.-Israel Science Foundation ; Israeli Ministry of Immigrant Absorption ; Israeli Ministry of Immigrant Absorption ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/23040]
专题	中国科学院国家天文台
通讯作者	Griv, Evgeny
作者单位	1.Ben Gurion Univ Negev, Dept Phys, POB 653, IL-84105 Beer Sheva, Israel 2.Natl Tsing Hua Univ, Dept Phys, Kuang Fu Rd 101, Hsinchu 30013, Taiwan 3.Chinese Acad Sci, Natl Astron Observ, Jia-20, Beijing 100012, Peoples R China 4.Natl Cent Univ, Grad Inst Astron, Jhongli 32001, Taiwan
推荐引用方式 GB/T 7714	Griv, Evgeny,Jiang, Ing-Guey,Hou, Li-Gang,et al. The Lin Shu type density wave structure of the Galaxy: Line-of-sight velocities of selected 37354 RAVE DR5 stars[J]. NEW ASTRONOMY,2019,66:1-8.
APA	Griv, Evgeny,Jiang, Ing-Guey,Hou, Li-Gang,&Ngeow, Chow-Choong.(2019).The Lin Shu type density wave structure of the Galaxy: Line-of-sight velocities of selected 37354 RAVE DR5 stars.NEW ASTRONOMY,66,1-8.
MLA	Griv, Evgeny,et al."The Lin Shu type density wave structure of the Galaxy: Line-of-sight velocities of selected 37354 RAVE DR5 stars".NEW ASTRONOMY 66(2019):1-8.