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)实验将很快产生物质分布和运动的补充3D地图，其细节无与伦比。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，以了解宇宙加速膨胀的起源，如果爱因斯坦的广义相对论(GR)在宇宙尺度上崩溃，以及暗物质和中微子的性质。康奈尔大学的科学家们提议将鉴别工具的武器库扩大到密度(星系团)和密度不足(空洞)环境中，在这些环境中，对GR的偏离和中微子质量的影响表现得不同。这项提议还将包括为纽约州北部的在校学生提供的“课后宇宙”计划，该计划介绍和应用基本的天文和物理概念。该计划旨在充分利用新一代大尺度结构和CMB调查所提供的各种天体物理尺度、示踪剂和环境。这项研究的产品将包括迄今最高的信噪比成对运动学Sunyaev-Zel‘dovich(KSZ)测量，方法是分析来自阿塔卡马宇宙学望远镜(ACT)的CMB最终地图，以及来自暗能量光谱仪(DESI)的第一年测量数据。这项工作还将使用模拟来准确预测各种修改的重力和大质量中微子宇宙对成对kSZ信号和空洞红移空间扭曲(RSD)轮廓的影响。它将涉及扩展拉格朗日微扰理论和高斯流模型方法的分析工作，以准确地模拟暗扇区理论中的RSD关联，从DESI 1年数据测量空洞RSD关联以及它们的宇宙学约束。最后，该项目包括理论工作，以调查来自维拉·鲁宾天文台的空间和时间遗产调查和/或CMB透镜观测的弱透镜数据和DESI RSD测量的潜力，以打破退化并揭示空洞中暗部门的独特特征。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势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