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Star Clusters and Galactic Chemodynamics: Implosive Formation of Super Star Clusters

机译:星团和银河化学动力学:超级星团的内爆形成

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We numerically investigate dynamical and chemical properties of star clusters (open and globular clusters, and a€?super star clustersa€?, SSC) formed in interacting/merging galaxies. The investigation is two-fold: (a) large-scale (100 pca€“100 kpc) SPH simulations on density and temperature evolution of gas in interacting/merging galaxies and (b) small-scale simulations on the effects of the high gas pressure of the ISM on the evolution of molecular clouds. We find that the pressure of ISM in merging galaxies can become higher than the internal pressure of GMCs (a??105 k B K cma€“3), in particular, in the tidal tails or the central regions of mergers. We also find that GMCs can collapse to form SSCs within an order of 107 yr due to the strong compression by the high-pressure ISM in mergers.
机译:我们用数值方法研究了相互作用/合并星系中形成的星团(开放和球状星团,以及“超级星团”,SSC)的动力学和化学性质。该研究有两个方面:(a)关于相互作用/合并星系中气体密度和温度演化的大规模(100 pca€“ 100 kpc”)SPH模拟,以及(b)关于高气体效应的小规模模拟ISM对分子云演化的压力。我们发现,合并星系中的ISM压力可能会高于GMC的内部压力(a ?? 105 k B K cma?3),特别是在潮汐尾部或合并的中心区域。我们还发现,由于合并中高压ISM的强大压缩,GMC可能会在107年内崩溃以形成SSC。

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