TARDIS论文II：从Lyman-alpha森林和光谱星系巡天的协同密度重建及其在原星系团和宇宙网中的应用
TARDIS Paper II: Synergistic Density Reconstruction from Lyman-alpha Forest and Spectroscopic Galaxy Surveys with Applications to Protoclusters and the Cosmic Web
摘要：
在这项工作中，我们扩展了层析吸收重建和密度推断方案（TARDIS），以包括多个示踪剂，同时重建宇宙正午（z ~ 2-3）的物质密度场。特别是，我们共同重建的基础密度场模拟莱曼阿尔法森林观测$z\sim 2.5$和重叠的星系调查。我们发现，这些数据是协同的，与莱曼阿尔法森林提供重建的低密度区域和星系调查跟踪密度峰值。我们发现一个更准确的功率谱重建到更高的尺度时，同时拟合这两个数据集，如果单独使用。当应用于宇宙网络分析时，我们发现执行联合分析相当于具有显著增加的视线间距的莱曼阿尔法调查。由于我们共同重建的速度场和物质场，我们证明了模拟观测体积进一步发展到z=0的能力，使我们能够创建一个严格的定义“原集群”的区域，将演变成集群。我们应用我们的重建研究原星系团的结构和演化，发现现实的调查参数，我们可以提供准确的质量估计的z \approx 2结构和他们的z = 0的命运。
英文摘要：
In this work we expand upon the Tomographic Absorption Reconstruction and Density Inference Scheme (TARDIS) in order to include multiple tracers while reconstructing matter density fields at Cosmic Noon (z ~ 2-3). In particular, we jointly reconstruct the underlying density field from simulated Lyman-Alpha forest observations at $z\sim 2.5$ and an overlapping galaxy survey. We find that these data are synergistic, with the Lyman Alpha forest providing reconstruction of low density regions and galaxy surveys tracing the density peaks. We find a more accurate power spectra reconstruction going to higher scales when fitting these two data-sets simultaneously than if using either one individually. When applied to cosmic web analysis, we find performing the joint analysis is equivalent to a Lyman Alpha survey with significantly increased sight-line spacing. Since we reconstruct the velocity field and matter field jointly, we demonstrate the ability to evolve the mock observed volume further to z=0, allowing us to create a rigorous definition of "proto-cluster" as regions which will evolve into clusters. We apply our reconstructions to study protocluster structure and evolution, finding for realistic survey parameters we can provide accurate mass estimates of the z \approx 2 structures and their z = 0 fate.
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。
