NAOC Open IR
Evolution of the local spiral structure of the Milky Way revealed by open clusters
Hao, C. J.1,2; Xu, Y.1,2; Hou, L. G.3; Bian, S. B.1,2; Li, J. J.1; Wu, Z. Y.3,4; He, Z. H.1,2; Li, Y. J.1; Liu, D. J.1,5
2021-08-17
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume652Pages:9
AbstractThe structure and evolution of the spiral arms of our Milky Way are basic but long-standing questions in astronomy. In particular, the lifetime of spiral arms is still a puzzle and has not been well constrained from observations. In this work, we aim to inspect these issues using a large catalogue of open clusters. We compiled a catalogue of 3794 open clusters based on Gaia EDR3. A majority of these clusters have accurately determined parallaxes, proper motions, and radial velocities. The age parameters for these open clusters are collected from references or calculated in this work. In order to understand the nearby spiral structure and its evolution, we analysed the distributions, kinematic properties, vertical distributions, and regressed properties of subsamples of open clusters. We find evidence that the nearby spiral arms are compatible with a long-lived spiral pattern and might have remained approximately stable for the past 80 million years. In particular, the Local Arm, where our Sun is currently located, is also suggested to be long-lived in nature and probably a major arm segment of the Milky Way. The evolutionary characteristics of nearby spiral arms show that the dynamic spiral mechanism might be not prevalent for our Galaxy. Instead, density wave theory is more consistent with the observational properties of open clusters.
KeywordGalaxy: evolution Galaxy: structure Galaxy: kinematics and dynamics open clusters and associations: general
Funding OrganizationNSFC ; NSFC ; Key Laboratory for Radio Astronomy ; Key Laboratory for Radio Astronomy ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; NSFC ; NSFC ; Key Laboratory for Radio Astronomy ; Key Laboratory for Radio Astronomy ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; NSFC ; NSFC ; Key Laboratory for Radio Astronomy ; Key Laboratory for Radio Astronomy ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; NSFC ; NSFC ; Key Laboratory for Radio Astronomy ; Key Laboratory for Radio Astronomy ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS
DOI10.1051/0004-6361/202140608
WOS KeywordVISIBLE OPEN CLUSTERS ; STAR-CLUSTERS ; TRIGONOMETRIC PARALLAXES ; PROPER MOTIONS ; GLOBAL SURVEY ; GAIA DR2 ; SYSTEM ; KINEMATICS ; PARAMETERS ; CATALOG
Language英语
Funding ProjectNSFC[11933011] ; NSFC[11873019] ; NSFC[11673066] ; NSFC[11988101] ; Key Laboratory for Radio Astronomy ; Youth Innovation Promotion Association CAS
Funding OrganizationNSFC ; NSFC ; Key Laboratory for Radio Astronomy ; Key Laboratory for Radio Astronomy ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; NSFC ; NSFC ; Key Laboratory for Radio Astronomy ; Key Laboratory for Radio Astronomy ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; NSFC ; NSFC ; Key Laboratory for Radio Astronomy ; Key Laboratory for Radio Astronomy ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; NSFC ; NSFC ; Key Laboratory for Radio Astronomy ; Key Laboratory for Radio Astronomy ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000686499900009
PublisherEDP SCIENCES S A
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/75876
Collection中国科学院国家天文台
Corresponding AuthorXu, Y.
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210023, Peoples R China
2.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 101408, Peoples R China
5.China Three Gorges Univ, Coll Sci, Yichang 443002, Peoples R China
Recommended Citation
GB/T 7714
Hao, C. J.,Xu, Y.,Hou, L. G.,et al. Evolution of the local spiral structure of the Milky Way revealed by open clusters[J]. ASTRONOMY & ASTROPHYSICS,2021,652:9.
APA Hao, C. J..,Xu, Y..,Hou, L. G..,Bian, S. B..,Li, J. J..,...&Liu, D. J..(2021).Evolution of the local spiral structure of the Milky Way revealed by open clusters.ASTRONOMY & ASTROPHYSICS,652,9.
MLA Hao, C. J.,et al."Evolution of the local spiral structure of the Milky Way revealed by open clusters".ASTRONOMY & ASTROPHYSICS 652(2021):9.
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