论文标题
巴哈马项目：动态暗能量对大规模结构的影响
The BAHAMAS project: Effects of dynamical dark energy on large-scale structure
论文作者
论文摘要
在这项工作中，我们使用构成巴哈马项目的一部分的大型宇宙学水动力学模拟，考虑了在空间平坦的宇宙中在空间平坦的宇宙中对大规模结构的大规模结构的影响的空间均匀但时间变化的暗能量（或“动态黑能”的影响。随着DDE改变宇宙的扩展历史，它会影响结构的增长。我们探讨了DDE中的变化，这些变化与宇宙微波背景相一致。我们发现，DDE可以在约10％的水平上影响物质和光环的聚类（抑制它以用于所谓的“冻结”模型，同时以“解冻”模型增强它，这应该通过即将进行的大型结构调查来区分。 DDE宇宙学还可以增强或抑制广泛的光晕质量的光环质量功能（相对于LCDM）。但是，光环的内部特性受到DDE的变化的最小影响。最后，我们表明，重子和相关的反馈过程的影响很大程度上与宇宙学的变化无关，并且可以单独建模这些过程，通常比几百分之几的精度更好
In this work we consider the impact of spatially-uniform but time-varying dark energy (or `dynamical dark energy', DDE) on large-scale structure in a spatially flat universe, using large cosmological hydrodynamical simulations that form part of the BAHAMAS project. As DDE changes the expansion history of the universe, it impacts the growth of structure. We explore variations in DDE that are constrained to be consistent with the cosmic microwave background. We find that DDE can affect the clustering of matter and haloes at the ~10% level (suppressing it for so-called `freezing' models, while enhancing it for `thawing' models), which should be distinguishable with upcoming large-scale structure surveys. DDE cosmologies can also enhance or suppress the halo mass function (with respect to LCDM) over a wide range of halo masses. The internal properties of haloes are minimally affected by changes in DDE, however. Finally, we show that the impact of baryons and associated feedback processes is largely independent of the change in cosmology and that these processes can be modelled separately to typically better than a few percent accuracy
