论文标题
TARDIS论文II：从Lyman-Alpha森林和光谱星系调查中重建的协同密度重建，并应用于原始群体和宇宙网络
TARDIS Paper II: Synergistic Density Reconstruction from Lyman-alpha Forest and Spectroscopic Galaxy Surveys with Applications to Protoclusters and the Cosmic Web
论文作者
论文摘要
在这项工作中，我们扩展了层析成像的重建和密度推理方案（TARDIS），以包括多个示踪剂，同时重建宇宙中午的物质密度字段（Z〜2-3）。特别是，我们从模拟的Lyman-Alpha森林观测值$ z \ SIM \ SIM 2.5 $和重叠的Galaxy调查中共同重建了基础密度场。我们发现这些数据是协同作用的，Lyman Alpha森林提供了低密度区域和星系调查的重建，以追踪密度峰。与单独使用两个数据集的同时拟合这两个数据集时，我们发现更准确的功率光谱重建将变为更高的尺度。当应用于宇宙网络分析时，我们发现执行联合分析等同于Lyman Alpha调查，视线间距显着增加。由于我们共同重建了速度场和物质场，因此我们证明了进一步观察到的模拟体积进一步发展为z = 0的能力，从而使我们能够将“原始群集”的严格定义作为将演变成簇的区域作为区域。我们将重构应用于研究原始群集结构和进化，发现了现实的调查参数，我们可以提供Z \ 2个结构的准确质量估计，其Z = 0命运。
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.
