Probing Gravity on Cosmic Scales with Galaxy Clustering and Weak Lensing

该项目将利用宇宙时间内暗物质结构增长的模拟，结合星系和星系团的增长和结构模型，开发工具，利用两次暗能量调查的数据，更好地了解暗物质集群如何创造我们今天在宇宙中看到的结构。所采用的方法将使用模拟器从不同的星系团模型中产生综合观测结果。这些合成观测结果将与观测结果进行比较，以确定哪种模型最能再现今天看到的星系团。该项目还将支持俄亥俄州立大学的教育和公共宣传工作，并继续支持与天文学相关的艺术和科学项目的结合。拟议的项目将开发用于暗能量调查（DES）和暗能量光谱仪器（DESI）数据的分析工具。该项目将构建仿真工具，用于基于宇宙学n体模拟的模型预测，该模型根据光晕占位分布模型填充星系。这些工具将应用于三个主要领域：(i)通过将星系-星系弱透镜效应与星系群集相结合来测量暗物质群集的演化；（ii）将星系团弱透镜效应与预测的星系团-星系相互关联和星系自相关相结合，测量暗物质星系团的演化；（iii）利用星系团星系相互关联函数的空间偏移畸变测量星系团周围的平均下降速度剖面。该项目将通过PI作为天文学系主任的参与，间接支持俄亥俄州立大学的一些推广和扩大参与努力。PI将直接支持结合艺术和科学项目的参与，特别是鼓励一门课程，教俄勒冈州立大学高级计算中心艺术与设计项目的动画学生为天文馆圆顶的沉浸式环境创作作品。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

The project will use simulations of dark matter structure growth over cosmological time combined with models for the growth and structure of galaxies and galaxy clusters to develop tools to use data from two dark energy surveys to better understand how dark matter clustering creates the structure we see in the universe today. The approach to be used will use emulators to produce synthetic observations from different models of galaxy clustering. These synthetic observations will be compared with observations to determine which models best reproduce the galaxy clustering seen today. The project will also support education and public outreach efforts at Ohio State University as well as continued support for the combination of art and science projects that relate to astronomy.The proposed project will develop analysis tools for use with data from the Dark Energy Survey (DES) and the Dark Energy Spectroscopic Instrument (DESI). The project will construct emulation tools for model predictions based on cosmological N-body simulations populated with galaxies according to halo occupation distribution models. The tools will be applied to three main areas: (i) measuring the evolution of dark matter clustering by combining galaxy-galaxy weak lensing with galaxy clustering; (ii) measuring the evolution of dark matter clustering by combining cluster weak lensing with projected cluster-galaxy cross-correlations and galaxy auto-correlations; and (iii) measuring mean infall velocity profiles around clusters using reshift-space distortions of the cluster galaxy cross-correlation function. The project will indirectly support a number of outreach and broadening participation efforts at Ohio State University through the involvement of the PI as chair of the Astronomy Department. The PI will be directly supporting engagement in combining art and science projects, specifically instigating a course that would teach animation students from OSU’s Advanced Computing Center for Art and Design program to create works for the immersive environment of a planetarium dome.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.