GALAXY MERGERS WITH ADAPTIVE MESH REFINEMENT: STAR FORMATION AND HOT GAS OUTFLOW
GALAXY MERGERS WITH ADAPTIVE MESH REFINEMENT: STAR FORMATION AND HOT GAS OUTFLOW
复制标题
具有自适应网格细化的星系合并：恒星形成和热气体外流
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Tom Abel
中科院分区：
文献类型：
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作者：
Ji;J. Wise;Tom Abel
在等级结构的形成中，星系的合并是频繁的，并且已知会显着影响它们的属性。为了理解这些相互作用，高分辨率的模拟是必不可少的，因为pc和Mpc尺度之间的非线性耦合。为此，我们提出了第一个自适应网格细化（AMR）的两个合并，低质量，最初的气体丰富的星系（1.8 × 1010 M的每个），包括星星的形成和反馈的模拟。通过102 × 107个总计算单元分辨星系，我们实现了多相星际介质的前所未有的分辨率，通过激波诱导的星星形成在合并星系中发现了广泛的星暴。AMR的高动态范围也使我们能够跟踪星系与其嵌入介质之间的相互作用，描绘星系外流和富含热金属的晕形成的方式。这些结果表明，AMR提供了一个强大的工具，在理解相互作用的星系。
In hierarchical structure formation, merging of galaxies is frequent and known to dramatically affect their properties. To comprehend these interactions high-resolution simulations are indispensable because of the nonlinear coupling between pc and Mpc scales. To this end, we present the first adaptive mesh refinement (AMR) simulation of two merging, low mass, initially gas-rich galaxies (1.8 × 1010 M☉ each), including star formation and feedback. With galaxies resolved by ∼2 × 107 total computational elements, we achieve unprecedented resolution of the multiphase interstellar medium, finding a widespread starburst in the merging galaxies via shock-induced star formation. The high dynamic range of AMR also allows us to follow the interplay between the galaxies and their embedding medium depicting how galactic outflows and a hot metal-rich halo form. These results demonstrate that AMR provides a powerful tool in understanding interacting galaxies.