The nearby spiral density-wave structure of the Galaxy: Line-of-sight and longitudinal velocities of 61 masers

doi:10.1002/asna.201713150

	The nearby spiral density-wave structure of the Galaxy: Line-of-sight and longitudinal velocities of 61 masers
	Ngeow, C. -C.3; Jiang, I. -G.1; Hou, L. -G.2; Griv, E.4
刊名	ASTRONOMISCHE NACHRICHTEN
	2017-07-01
卷号	338 期号:6 页码:729-739
关键词	Galaxy: Kinematics And Dynamics Galaxy: Structure Galaxies: Spiral
DOI	10.1002/asna.201713150
文献子类	Article
英文摘要	This paper is the eighth in a series presenting the results of the dynamical analysis of velocity fields of Galactic objects on the assumption that the system is subject to moderately unstable, low-amplitude, tightly wound, and rigidly rotating Lin-Shu density waves. The data of 61 masers associated with star-forming regions having distances d<4 kpc from the Sun and h<200 pc from the plane are collected from the work by Reid et al. Both line-of-sight v(los) and transverse along the Galactic longitude v(l)velocities of these objects are analyzed. It is shown that there may coexist at least two radial scales of irregularity of a velocity field with different wavelengths approximate to 2 and approximate to 3.5 kpc and amplitudes of the perturbed gravitational potential for all values of the number of spiral arms considered, m = 1, 2, 3, and 4. To be consistent with the current ideas as to the spiral structure of the Galaxy, we argue respectively that the Sun is located at the inner edge of the Cygnus-Orion arm (very close to the arm center), between the nearby inner Carina-Sagittarius and outer Perseus arms (closer to the inner one). Estimates obtained from an analysis of two independent velocities v(los) and v(l) are fairly consistent. As for us, the latter establishes further evidence to support the Lin-Shu wave proposal.
WOS关键词	GALACTIC ROTATION CURVE ; MILKY-WAY-GALAXY ; DISK GALAXIES ; OPEN CLUSTERS ; STELLAR KINEMATICS ; UNSTABLE MODES ; YOUNG STARS ; OWN GALAXY ; ARMS ; PARAMETERS
WOS研究方向	Astronomy & Astrophysics
语种	英语
WOS记录号	WOS:000408308300010
资助机构	Israel Science Foundation ; Israel Science Foundation ; Israeli Ministry of Immigrant Absorption ; Israeli Ministry of Immigrant Absorption ; Binational U.S.-Israel Science Foundation ; Binational U.S.-Israel Science Foundation ; Ministry of Science and Technology in Taiwan ; Ministry of Science and Technology in Taiwan ; National Natural Science Foundation of China(11503033) ; National Natural Science Foundation of China(11503033) ; Israel Science Foundation ; Israel Science Foundation ; Israeli Ministry of Immigrant Absorption ; Israeli Ministry of Immigrant Absorption ; Binational U.S.-Israel Science Foundation ; Binational U.S.-Israel Science Foundation ; Ministry of Science and Technology in Taiwan ; Ministry of Science and Technology in Taiwan ; National Natural Science Foundation of China(11503033) ; National Natural Science Foundation of China(11503033)
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/20144]
专题	国家天文台_射电天文研究部
作者单位	1.Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan 2.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China 3.Natl Cent Univ, Grad Inst Astron, Jhongli, Taiwan 4.Ben Gurion Univ Negev, Dept Phys, POB 653, IL-84105 Beer Sheva, Israel
推荐引用方式 GB/T 7714	Ngeow, C. -C.,Jiang, I. -G.,Hou, L. -G.,et al. The nearby spiral density-wave structure of the Galaxy: Line-of-sight and longitudinal velocities of 61 masers[J]. ASTRONOMISCHE NACHRICHTEN,2017,338(6):729-739.
APA	Ngeow, C. -C.,Jiang, I. -G.,Hou, L. -G.,&Griv, E..(2017).The nearby spiral density-wave structure of the Galaxy: Line-of-sight and longitudinal velocities of 61 masers.ASTRONOMISCHE NACHRICHTEN,338(6),729-739.
MLA	Ngeow, C. -C.,et al."The nearby spiral density-wave structure of the Galaxy: Line-of-sight and longitudinal velocities of 61 masers".ASTRONOMISCHE NACHRICHTEN 338.6(2017):729-739.