Combining measurements of the Cosmic Microwave Background with galaxy clustering to probe the nature of gravity and neutrinos in the universe.

将宇宙微波背景的测量与星系团结合起来，探索宇宙中重力和中微子的性质。

• 批准号: 2206088
• 负责人: Rachel Bean
• 金额: $ 42.67万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2206088&HistoricalAwards=false
• 关键词: Combining; measurements; Cosmic; Microwave; Background

Upcoming galaxy surveys and Cosmic Microwave Background (CMB) experiments will shortly produce complementary 3D maps of the distribution and motion of matter in unparalleled detail. This presents an unprecedented opportunity to address some of the most fundamental and profound questions in astrophysics, to understand: the origins of the cosmos’ accelerating expansion, if Einstein’s general theory of relativity (GR) breaks down on cosmological scales, and the nature of dark matter and neutrinos. Scientists at Cornell University propose to expand the armory of discriminating tools spanning both dense (clusters of galaxies) and under-dense (void) environments in which deviations from GR and the effects of neutrino masses manifest differently. This proposal will also include an “Afterschool Universe” program for school students in upstate New York that introduces and applies basic astronomical and physics concepts.This project is tailored to fully utilize the range of astrophysical scales, tracers and environments made newly accessible by the next generation large scale structure and CMB surveys. Products from this research will include the highest signal-to-noise pairwise kinematic Sunyaev-Zel’dovich (kSZ) measurements to-date by analyzing the final CMB maps from the Atacama Cosmology Telescope (ACT) combined with Year-1 survey data from the Dark Energy Spectroscopic Instrument (DESI). The work will also use simulations to yield accurate predictions of the effects on the pairwise kSZ signal and void redshift space distortion (RSD) profile, from a variety of modified gravity and massive neutrino cosmologies. It will involve analytic work to extend Lagrangian perturbation theory and Gaussian streaming model approaches to accurately model RSD correlations in dark sector theories, the measurement of void RSD correlations from the DESI Year-1 data and cosmological constraints from them. Finally, this project includes theoretical work to investigate the potential of combining weak lensing data from the Vera Rubin Observatory’s Legacy Survey of Space and Time and/or CMB lensing observations, and DESI RSD measurements, in order to break degeneracies and reveal distinctive signatures of the dark sector in voids.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.

即将到来的星系调查和宇宙微波背景（CMB）实验将很快以无与伦比的细节制作出物质分布和运动的互补3D地图。这提供了一个前所未有的机会来解决天体物理学中一些最基本和最深刻的问题，以理解：宇宙加速膨胀的起源，如果爱因斯坦的广义相对论（GR）在宇宙尺度上失效，以及暗物质和中微子的本质。康奈尔大学（Cornell University）的科学家们提议扩大鉴别工具的武器库，使其跨越密集（星系团）和低密度（空洞）环境，在这些环境中，偏离GR和中微子质量的影响表现不同。该提案还将包括一个针对纽约州北部学生的“课后宇宙”项目，介绍和应用基本的天文学和物理学概念。该项目旨在充分利用下一代大规模结构和CMB调查新提供的天体物理尺度、示踪剂和环境。这项研究的产品将包括迄今为止最高的信噪比配对运动学Sunyaev-Zel 'dovich （kSZ）测量，通过分析阿塔卡马宇宙望远镜（ACT）的最终CMB地图，结合暗能量光谱仪器（DESI）的第一年调查数据。这项工作还将使用模拟来准确预测各种修正重力和大质量中微子宇宙学对kSZ信号和空洞红移空间失真（RSD）剖面的影响。它将涉及扩展拉格朗日摄动理论和高斯流模型方法的分析工作，以准确地模拟暗物质理论中的RSD相关性，从DESI第一年的数据中测量空洞RSD相关性以及它们的宇宙学约束。最后，该项目包括理论工作，以研究结合Vera Rubin天文台的时空遗留调查和/或CMB透镜观测的弱透镜数据和DESI RSD测量的潜力，以打破简并并揭示空洞中黑暗部门的独特特征。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。

项目成果

Challenges in constraining gravity with cosmic voids

• DOI: 10.1103/physrevd.107.124008
• 发表时间: 2022-12
• 期刊: Physical Review D
• 影响因子: 5
• 作者: C. Wilson;R. Bean