论文标题
重型反馈对宇宙网络的影响
Effects of Baryonic Feedback on the Cosmic Web
论文作者
论文摘要
我们研究重子对宇宙网络的影响 - 光晕，细丝，墙壁和空隙。为此，我们将宇宙网络形态分析算法Nexus的修改版本应用于Illustristng模拟。我们发现，由于重子，Halos损失了超过$ 10 \％的质量，主要是由于细丝和墙壁和空隙的一小部分。但是，传质不会显着转移结构的边界，而使宇宙结构的体积分数在很大程度上不受影响。我们量化了重型反馈对单个宇宙结构密度场的功率谱和概率密度函数（PDF）的影响。对于功率谱，可以通过包括$ M \ ge10^{12} 〜M_ \ odot/H $ Halos来解释反馈引起的大多数抑制，而无需考虑其他宇宙结构。但是，在检查密度场的PDF时，我们发现在剩下的细丝，墙壁和空隙的区域中，我们发现了近100美元的最空区域的抑制和10美元\％$ - 级别的效果（增强或抑制）。我们的结果表明，建模巴元在整个宇宙网络（不仅是光晕）中对宇宙学分析超出两点统计或基于现场推断的效果的重要性。
We study the effect of baryons on the cosmic web -- halos, filaments, walls, and voids. To do so, we apply a modified version of NEXUS, a cosmic web morphological analysis algorithm, to the IllustrisTNG simulations. We find that halos lose more than $10\%$ of their mass due to baryons, mostly to filaments and a small portion to walls and voids. However, the mass transfer does not significantly shift the boundaries of structures, leaving the volume fractions of the cosmic structures largely unaffected. We quantify the effects of baryonic feedback on the power spectrum and the probability density function (PDF) of the density field for individual cosmic structures. For the power spectrum, most suppression due to feedback can be accounted for by including $M\ge10^{12}~M_\odot/h$ halos, without considering other cosmic structures. However, when examining the PDF of the density field, we find nearly $100\%$ suppression of the emptiest regions and $10\%$-level effects (boost or suppression) in the remaining regions of filaments, walls, and voids. Our results indicate the importance of modeling the effects of baryons in the whole cosmic web, not just halos, for cosmological analysis beyond two-point statistics or field-based inferences.
