大质量恒星形成区的自相似星团结构:从星团到嵌入星团的孤立演化

IF 5.4 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS
Jian-wen Zhou, Pavel Kroupa, Sami Dib
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引用次数: 0

摘要

我们使用树枝图算法将恒星的表面密度分布分解成层次结构。这些结构与星团的多尺度结构相联系。在不同尺度下测量到的星团质量-大小关系的类似幂律表明星团具有自相似结构。我们使用最小生成树方法测量了每个大质量恒星形成区域中星团和气体团块之间的距离。星团之间、星团与星团之间以及星团与星团之间的距离相当,这表明从星团到嵌入式星团的演化是孤立地、局部地进行的,对周围天体的影响不大。通过比较ATLASGAL星团和已识别出的嵌入星团的质量函数,我们证实恒星形成效率≈0.33可以作为ATLASGAL星团的典型值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Self-similar cluster structures in massive star-forming regions: Isolated evolution from clumps to embedded clusters
We used the dendrogram algorithm to decompose the surface density distributions of stars into hierarchical structures. These structures were tied to the multiscale structures of star clusters. A similar power-law for the mass-size relation of star clusters measured at different scales suggests a self-similar structure of star clusters. We used the minimum spanning tree method to measure the separations between clusters and gas clumps in each massive star-forming region. The separations between clusters, between clumps, and between clusters and clumps were comparable, which indicates that the evolution from clump to embedded cluster proceeds in isolation and locally, and does not affect the surrounding objects significantly. By comparing the mass functions of the ATLASGAL clumps and the identified embedded clusters, we confirm that a constant star formation efficiency of ≈0.33 can be a typical value for the ATLASGAL clumps.
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来源期刊
Astronomy & Astrophysics
Astronomy & Astrophysics 地学天文-天文与天体物理
CiteScore
10.20
自引率
27.70%
发文量
2105
审稿时长
1-2 weeks
期刊介绍: Astronomy & Astrophysics is an international Journal that publishes papers on all aspects of astronomy and astrophysics (theoretical, observational, and instrumental) independently of the techniques used to obtain the results.
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