The nearby spiral density-wave structure of the Galaxy: line-of-sight velocities of the Gaia DR2 main-sequence A, F, G, and K stars
文献类型：期刊论文
| 作者 | Griv, Evgeny3; Gedalin, Michael3; Shih, I-Chun2; Hou, Li-Gang1; Jiang, Ing-Guey4 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2020-04-01 |
| 卷号 | 493期号:2页码:2111-2126 |
| 关键词 | Galaxy: kinematics and dynamics Galaxy: structure galaxies: spiral |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/staa357 |
| 英文摘要 | Distances and velocities of approximate to 2400 000 main-sequence A, F, G, and K stars are collected from the second data release of ESA's Gaia astrometric mission. This material is analysed to find evidence of radial and azimuthal systematic non-circular motions of stars in the solar neighbourhood on the assumption that the system is subject to spiral density waves (those produced by a spontaneous disturbance, a central bar, or an external companion), developing in the Galactic disc. Data analysis of line-of-sight velocities of approximate to 1500 000 stars selected within 2 kpc from the Sun and 500 pc from the Galactic mid-plane with distance accuracies of <10 per cent makes evident that a radial wavelength of the wave pattern is 1.1-1.6 kpc and a phase of the wave at the Sun's location in the Galaxy is 55 degrees-95 degrees. Respectively, the Sun is situated at the inner edge of the nearest Orion spiral arm segment. Thus, the local Orion arm is a part of a predominant density-wave structure of the system. The spiral structure of the Galaxy has an oscillating nature corresponding to a concept of the Lin-Shu-type moderately growing in amplitude, tightly wound, and rigidly rotating density waves. |
| WOS关键词 | MILKY-WAY ; DISK GALAXIES ; SOLAR NEIGHBORHOOD ; INTERSTELLAR-MEDIUM ; BARRED GALAXIES ; SHOCK FORMATION ; VERTICAL WAVES ; YOUNG STARS ; STELLAR ; KINEMATICS |
| 资助项目 | Israeli Ministry of Immigrant Absorption ; Israel Science Foundation ; National Natural Science Foundation of China ; Ministry of Science and Technology in Taiwan |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000525996700040 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | Israeli Ministry of Immigrant Absorption ; Israeli Ministry of Immigrant Absorption ; Israel Science Foundation ; Israel Science Foundation ; 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 ; Israeli Ministry of Immigrant Absorption ; Israeli Ministry of Immigrant Absorption ; Israel Science Foundation ; Israel Science Foundation ; 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 ; Israeli Ministry of Immigrant Absorption ; Israeli Ministry of Immigrant Absorption ; Israel Science Foundation ; Israel Science Foundation ; 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 ; Israeli Ministry of Immigrant Absorption ; Israeli Ministry of Immigrant Absorption ; Israel Science Foundation ; Israel Science Foundation ; 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 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/56185]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Griv, Evgeny |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Jia 20, Beijing 100012, Peoples R China 2.Univ PSL, Observ Paris, GEPI, CNRS, 5 Pl Jules Janssen, F-92190 Meudon, France 3.Ben Gurion Univ Negev, Dept Phys, POB 653, IL-8410501 Beer Sheva, Israel 4.Natl Tsing Hua Univ, Dept Phys, Kuang Fu Rd 101, Hsinchu 30013, Taiwan |
| 推荐引用方式 GB/T 7714 | Griv, Evgeny,Gedalin, Michael,Shih, I-Chun,et al. The nearby spiral density-wave structure of the Galaxy: line-of-sight velocities of the Gaia DR2 main-sequence A, F, G, and K stars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,493(2):2111-2126. |
| APA | Griv, Evgeny,Gedalin, Michael,Shih, I-Chun,Hou, Li-Gang,&Jiang, Ing-Guey.(2020).The nearby spiral density-wave structure of the Galaxy: line-of-sight velocities of the Gaia DR2 main-sequence A, F, G, and K stars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,493(2),2111-2126. |
| MLA | Griv, Evgeny,et al."The nearby spiral density-wave structure of the Galaxy: line-of-sight velocities of the Gaia DR2 main-sequence A, F, G, and K stars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 493.2(2020):2111-2126. |
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来源：国家天文台
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