The nearby spiral density-wave structure of the Galaxy: Line-of-sight and longitudinal velocities of 61 masers
文献类型：期刊论文
| 作者 | Ngeow, C. -C.3; Jiang, I. -G.1; Hou, L. -G.2; Griv, E.4 |
| 刊名 | ASTRONOMISCHE NACHRICHTEN
 |
| 出版日期 | 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) |
| 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. |
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