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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
Griv, Evgeny1; Gedalin, Michael1; Shih, I-Chun2; Hou, Li-Gang3; Jiang, Ing-Guey4
2020-04-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume493Issue:2Pages:2111-2126
AbstractDistances 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.
KeywordGalaxy: kinematics and dynamics Galaxy: structure galaxies: spiral
Funding OrganizationIsraeli 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
DOI10.1093/mnras/staa357
WOS KeywordMILKY-WAY ; DISK GALAXIES ; SOLAR NEIGHBORHOOD ; INTERSTELLAR-MEDIUM ; BARRED GALAXIES ; SHOCK FORMATION ; VERTICAL WAVES ; YOUNG STARS ; STELLAR ; KINEMATICS
Language英语
Funding ProjectIsraeli Ministry of Immigrant Absorption ; Israel Science Foundation ; National Natural Science Foundation of China ; Ministry of Science and Technology in Taiwan
Funding OrganizationIsraeli 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
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000525996700040
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/56188
Collection中国科学院国家天文台
Corresponding AuthorGriv, Evgeny
Affiliation1.Ben Gurion Univ Negev, Dept Phys, POB 653, IL-8410501 Beer Sheva, Israel
2.Univ PSL, Observ Paris, GEPI, CNRS, 5 Pl Jules Janssen, F-92190 Meudon, France
3.Chinese Acad Sci, Natl Astron Observ, Jia 20, Beijing 100012, Peoples R China
4.Natl Tsing Hua Univ, Dept Phys, Kuang Fu Rd 101, Hsinchu 30013, Taiwan
Recommended Citation
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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