THE SHAPE EVOLUTION OF GALACTIC OPEN CLUSTERS FROM OBSERVATIONS UNDER GALACTIC EXTERNAL FORCES
文献类型：期刊论文
| 作者 | Zhai, Meng1,2 ; Abt, Helmut3; Zhao, Gang1,2; Li, Chengdong1,2
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2017-02-01 |
| 卷号 | 153期号:2 |
| 关键词 | Galaxy: stellar content methods: statistical open clusters and associations: general Supporting material: machine-readable table |
| 英文摘要 | We 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | INFRARED STAR-CLUSTERS ; LARGE-MAGELLANIC-CLOUD ; GLOBULAR-CLUSTERS ; ELLIPTICITY ; DISRUPTION ; CATALOG ; IV |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000393788400001 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8302]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.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 |
| 推荐引用方式 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). |
入库方式： OAI收割
来源：国家天文台
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