Testing General Relativity with Galaxy Surveys

用星系巡天测试广义相对论

• 批准号: 1713791
• 负责人: Martin White
• 金额: $ 45.81万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-15 至 2022-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1713791&HistoricalAwards=false
• 关键词: Testing; General; Relativity; Galaxy; Surveys

Cosmology has made tremendous advances in the last decade, and we now have a highly predictive model for the emergence of structure in the Universe, which draws upon a rich set of ideas from high energy physics, gravitation theory, and astrophysics. However, this model requires one very surprising ingredient, an accelerating expansion of the Universe. This acceleration poses the most profound question in physical science today with even the most prosaic explanations demanding the existence of a new constituent ("dark energy") with exotic physical properties. More extreme alternatives include extra spatial dimensions or a breakdown of General Relativity on cosmological scales. Luckily, the motion of galaxies allows us to probe dark energy and to test General Relativity. Turning this realization into a precision tool is the goal of this project.The project aims to develop the insight that large-scale structure can provide as a probe of dark energy and modified gravity. By combining state-of-the-art modeling and new analysis methods with the massive new data sets being accumulated from redshift surveys, it is possible to simultaneously measure the growth rate of cosmic structure and the cosmological geometry using redshift-space distortions. The investigators will validate and apply models rooted in perturbation theory to the most constraining subsets of existing near-future data sets to generate a consistent meta-analysis of the current state of the field.

宇宙学在过去十年中取得了巨大进步，我们现在对宇宙中结构的出现有了一个高度预测的模型，该模型借鉴了高能物理学、引力理论和天体物理学的丰富思想。 然而，这个模型需要一个非常令人惊讶的因素，即宇宙的加速膨胀。 这种加速提出了当今物理科学中最深刻的问题，即使是最平淡的解释也要求存在具有奇异物理特性的新成分（“暗能量”）。 更极端的选择包括额外的空间维度或广义相对论在宇宙尺度上的分解。 幸运的是，星系的运动使我们能够探测暗能量并测试广义相对论。 将这种认识转化为精密工具是该项目的目标。该项目旨在开发大型结构作为暗能量和修正重力探测器所提供的洞察力。 通过将最先进的建模和新的分析方法与红移巡天积累的大量新数据集相结合，可以利用红移空间扭曲同时测量宇宙结构的增长率和宇宙学几何。 研究人员将验证植根于微扰理论的模型并将其应用于现有近期数据集最具约束力的子集，以生成对该领域当前状态的一致荟萃分析。

项目成果

Synergies between radio, optical and microwave observations at high redshift

• DOI: 10.1088/1475-7516/2019/07/023
• 发表时间: 2018-10
• 期刊: Journal of Cosmology and Astroparticle Physics
• 影响因子: 6.4
• 作者: Shi-Fan Chen;E. Castorina;M. White;A. Slosar

Biased tracers of two fluids in the Lagrangian picture

• DOI: 10.1088/1475-7516/2019/06/006
• 发表时间: 2019-03
• 期刊: Journal of Cosmology and Astroparticle Physics
• 影响因子: 6.4
• 作者: Shi-Fan Chen;E. Castorina;M. White

Consistent modeling of velocity statistics and redshift-space distortions in one-loop perturbation theory

• DOI: 10.1088/1475-7516/2020/07/062
• 发表时间: 2020-05
• 期刊: Journal of Cosmology and Astroparticle Physics
• 影响因子: 6.4
• 作者: Shi-Fan Chen;Z. Vlah;M. White

CosmoDC2: A Synthetic Sky Catalog for Dark Energy Science with LSST

• DOI: 10.3847/1538-4365/ab510c
• 发表时间: 2019-07
• 期刊: The Astrophysical Journal Supplement Series
• 作者: D. Korytov;Andrew P. Hearin;E. Kovacs;P. Larsen;Esteban Rangel;J. Hollowed;A. Benson;K. Heitmann;Yao-Yuan Mao;A. Bahmanyar;Chihway L. Chang;D. Campbell;J. DeRose;H. Finkel;N. Frontiere;E. Gawiser;S. Habib;B. Joachimi;F. Lanusse;Nan Li;R. Mandelbaum;C. Morrison;J. Newman;A. Pope;E. Rykoff;M. Simet;C. To;V. Vikraman;R. Wechsler;M. White

Measuring the growth of structure with intensity mapping surveys

• DOI: 10.1088/1475-7516/2019/06/025
• 发表时间: 2019-02
• 期刊: Journal of Cosmology and Astroparticle Physics
• 影响因子: 6.4
• 作者: E. Castorina;M. White