Morphology of Galactic open clusters
文献类型：期刊论文
| 作者 | Chen, WP; Chen, CW; Shu, CG |
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2004-11-01 |
| 卷号 | 128期号:5页码:2306-2315 |
| 关键词 | galaxies : star clusters methods : data analysis stellar dynamics |
| 英文摘要 | We analyzed the shapes of Galactic open clusters by the star-counting technique with the Two Micron All Sky Survey star catalog database. Morphological parameters such as the ellipticity and size have been derived via stellar density distribution, weighed by clustering probability. We find that most star clusters are elongated, even for the youngest star clusters of a few million years old, which are located near the Galactic disk. The shapes of young star clusters must reflect the conditions in the parental molecular clouds and during the cluster formation process. As an open cluster ages, stellar dynamics cause the inner part of the cluster to circularize, but the overall radius gets larger and the stellar density becomes sparser. We discuss how the internal relaxation process competes with Galactic external perturbation during cluster evolution. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | OPEN STAR-CLUSTERS ; OLDEST OPEN CLUSTERS ; METALLICITY DISTRIBUTION ; DISK ; EXTINCTION ; SHAPES ; AGE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000224866500024 |
| 公开日期 | 2015-08-18 |
| 源URL | [http://119.78.226.72/handle/331011/18302]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Natl Cent Univ, Inst Astron, Chungli 32054, Taiwan 2.Natl Cent Univ, Dept Phys, Chungli 32054, Taiwan 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 4.Shanghai Normal Univ, Ctr Astrophys, Shanghai 200234, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, WP,Chen, CW,Shu, CG. Morphology of Galactic open clusters[J]. ASTRONOMICAL JOURNAL,2004,128(5):2306-2315. |
| APA | Chen, WP,Chen, CW,&Shu, CG.(2004).Morphology of Galactic open clusters.ASTRONOMICAL JOURNAL,128(5),2306-2315. |
| MLA | Chen, WP,et al."Morphology of Galactic open clusters".ASTRONOMICAL JOURNAL 128.5(2004):2306-2315. |
入库方式： OAI收割
来源：上海天文台
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