The Lin-Shu type density wave structure of our Galaxy: line-of-sight velocities of 396 HII regions
文献类型：期刊论文
| 作者 | Griv, E.1; Hou, L. -G.2; Jiang, I. -G.3 |
| 刊名 | CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY
 |
| 出版日期 | 2015-11-01 |
| 卷号 | 123期号:3页码:305-323 |
| 关键词 | Galaxy Galaxy kinematics Spiral structure Cygnus-Orion spiral arm |
| 英文摘要 | In this fifth paper in a series, we check again the Lin-Shu idea of small-amplitude density waves in our Galaxy. The updated catalogue of Galactic objects of Hou and Han (Hou and Han in Astron Astrophys 569:125-146, 2014), available in the literature, is used. The line-of-sight velocity field of 396 HII regions with known trigonometric or photometric distances and their uncertainties within 4 kpc from the Sun is investigated in terms of a wave perturbation. Our previous study is enlarged by examining the secondary minima of the residual sum of squares of the predicted and measured velocities of a sample of objects in a considerable region surrounding the Sun. Both the geometrical and physical parameters of the wave pattern are evaluated. Here we show, for the first time, that the local Cygnus-Orion spiral arm, where the Sun is located, does form a part of the major density wave structure of the system under the question but is not a spur originating at the inner Carina-Sagittarius arm or at the outer Perseus arm. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000361970200004 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5568]  |
| 专题 | 国家天文台_射电天文研究部 |
| 作者单位 | 1.Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Natl Tsing Hua Univ, Dept Phys, Hsinchu 300, Taiwan |
| 推荐引用方式 GB/T 7714 | Griv, E.,Hou, L. -G.,Jiang, I. -G.. The Lin-Shu type density wave structure of our Galaxy: line-of-sight velocities of 396 HII regions[J]. CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY,2015,123(3):305-323. |
| APA | Griv, E.,Hou, L. -G.,&Jiang, I. -G..(2015).The Lin-Shu type density wave structure of our Galaxy: line-of-sight velocities of 396 HII regions.CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY,123(3),305-323. |
| MLA | Griv, E.,et al."The Lin-Shu type density wave structure of our Galaxy: line-of-sight velocities of 396 HII regions".CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY 123.3(2015):305-323. |
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来源：国家天文台
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