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THE SHAPE EVOLUTION OF GALACTIC OPEN CLUSTERS FROM OBSERVATIONS UNDER GALACTIC EXTERNAL FORCES
Zhai, Meng1,2; Abt, Helmut3; Zhao, Gang1,2; Li, Chengdong1,2
2017-02-01
Source PublicationASTRONOMICAL JOURNAL
Volume153Issue:2
AbstractWe present the Galactic characteristics of 154 open clusters using the. stellar statistics method with data from the WEBDA database. We find that all clusters in our sample are elongated in shape, which indicates that the spherical clusters are stretched out to be ellipsoid as a function of age (log(age/year) = 6.64-9.7). By dividing a cluster into a central core and an outer part, we have computed the apparent ellipticities of these two parts respectively. The scale relations between ellipticities and age indicate that the outer parts of open clusters become more elliptical. while the central cores remain circular. We suppose that the outer parts become more elliptical because they are more subjected to the external forces, e.g., Galactic differential rotation, while the central cores form a circular shape under the domination of stellar dynamics. We have also performed an analysis of the crucial influence of cluster mass and location on its shape.
SubtypeArticle
KeywordGalaxy: Stellar Content Methods: Statistical Open Clusters And Associations: General Supporting Material: Machine-readable Table
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationNational Natural Science Foundation of China(11390371 ; National Natural Science Foundation of China(11390371 ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09000000) ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09000000) ; 11233004 ; 11233004 ; 11573032 ; 11573032 ; 11303037) ; 11303037) ; National Natural Science Foundation of China(11390371 ; National Natural Science Foundation of China(11390371 ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09000000) ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09000000) ; 11233004 ; 11233004 ; 11573032 ; 11573032 ; 11303037) ; 11303037)
DOI10.3847/1538-3881/153/2/57
WOS KeywordINFRARED STAR-CLUSTERS ; LARGE-MAGELLANIC-CLOUD ; GLOBULAR-CLUSTERS ; ELLIPTICITY ; DISRUPTION ; CATALOG ; IV
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(11390371 ; National Natural Science Foundation of China(11390371 ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09000000) ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09000000) ; 11233004 ; 11233004 ; 11573032 ; 11573032 ; 11303037) ; 11303037) ; National Natural Science Foundation of China(11390371 ; National Natural Science Foundation of China(11390371 ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09000000) ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09000000) ; 11233004 ; 11233004 ; 11573032 ; 11573032 ; 11303037) ; 11303037)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000393788400001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8302
Collection光学天文研究部
Affiliation1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Kitt Peak Observ, POB 26732, Tucson, AZ 85726 USA
Recommended Citation
GB/T 7714
Zhai, Meng,Abt, Helmut,Zhao, Gang,et al. THE SHAPE EVOLUTION OF GALACTIC OPEN CLUSTERS FROM OBSERVATIONS UNDER GALACTIC EXTERNAL FORCES[J]. ASTRONOMICAL JOURNAL,2017,153(2).
APA Zhai, Meng,Abt, Helmut,Zhao, Gang,&Li, Chengdong.(2017).THE SHAPE EVOLUTION OF GALACTIC OPEN CLUSTERS FROM OBSERVATIONS UNDER GALACTIC EXTERNAL FORCES.ASTRONOMICAL JOURNAL,153(2).
MLA Zhai, Meng,et al."THE SHAPE EVOLUTION OF GALACTIC OPEN CLUSTERS FROM OBSERVATIONS UNDER GALACTIC EXTERNAL FORCES".ASTRONOMICAL JOURNAL 153.2(2017).
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