arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1401.4510astro-ph.GAastro-ph.SR
收藏

小星团的形成与演化

The Formation and Evolution of Small Star Clusters

Helen Kirk, Stella S. R. Offner, Kayla Redmond

摘要:

最近的观测表明,小的,年轻的,约10至40个成员的恒星群往往有一个位于中心的最大质量的成员,让人想起在大型集群系统中看到的质量分离。在这里,我们分析形成小集群的流体动力学模拟,并以与观测相同的方式分析其属性。我们发现,模拟集群具有类似的属性观察到的集群,包括表现出质量偏析的趋势。在模拟中,质量最大的成员的中心位置不是由于动力学演化,因为集群成员之间几乎没有相互作用。相反,最大的星团成员似乎形成在中心。我们还发现,星团中质量较大的恒星形成的时间稍早。

英文摘要:

Recent observations show that small, young, stellar groupings of ~10 to 40 members tend of have a centrally-located most massive member, reminiscent of mass segregation seen in large clustered systems. Here, we analyze hydrodynamic simulations which form small clusters and analyze their properties in a manner identical to the observations. We find that the simulated clusters possess similar properties to the observed clusters, including a tendency to exhibit mass segregation. In the simulations, the central location of the most massive member is not due to dynamical evolution, since there is little interaction between the cluster members. Instead, the most massive cluster member appears to form at the center. We also find that the more massive stars in the cluster form at slightly earlier times.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑