Theory and Analysis of Cosmic Web Observables

宇宙网可观测理论与分析

• 批准号: RGPIN-2019-07306
• 负责人: Bond, Richard
• 金额: $ 2.99万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=746480
• 关键词: Theory; Analysis; Cosmic; Web; Observables

This research will develop theoretical frameworks and analysis tools for the tremendous outpouring of Cosmic Microwave Background (CMB) and Large Scale Structure (LSS) and galaxy formation data that will arise over 2019-2024 period, and beyond. The 2012-18 period has been amazing, solidifying a Standard Model of Cosmology (SMc) dominated by dark energy and dark matter at high precision, in large part through our activities on the Planck CMB satellite team and the higher resolution Atacama Cosmology Telescope (ACT) team. The impact was recently recognized by the 2018 Gruber Prize in Cosmology to our Planck group for providing "the definitive description of the universe on the largest and smallest scales." CMB and LSS: This proposal emphasizes planned work on Advanced ACTPol and the Simons Observatory follow-on, the related CCATprime telescope, a second flight of the balloon-borne Spider experiment, cross-correlation work of the CMB with the LSS space experiment Euclid and other ground-based LSS surveys, and various three-dimensional line intensity mapping (LIM) experiments probing galaxy formation and assembly. A primary motivation is to find new physics beyond the standard model of cosmology (BSMc). BSMc projects include how to measure whether dark energy is coupled to matter, whether quantum aspects of dark matter are observable, and to create statistical tests for novel non-Gaussian primordial structures generated in the early Universe.  Gravity Waves and Interstellar Dust Polarization: A major CMB target is to discover early-Universe gravity waves with CMB polarization. The greatest challenge is separating polarized Galactic emissions from what is truly primordial. For this we are developing novel re-mapping measures of anisotropy in the "Milky Way's interstellar web" polarized emissions. Line Intensity Mapping is an emerging technique to map large cosmological volumes to probe the Epoch of Galaxy Assembly and even of the pre-galactic cosmic dawn. The Canadian CHIME radio telescope targeting the 21cm line of hydrogen and COMAP in California, targeting a carbon monoxide line, are now taking data, and CCATprime, targeting ionized carbon, is under construction. Our group at CITA is engaging in all of the analytical and theoretical challenges that will arise from these vast new data sources, including any new BSMc physics that might emerge. Theory and Simulations: We will create ensembles of rapidly-computable yet accurate SMc and BSMc mock simulations we call webskys for cross-analyses, since all of these big-sky experiments are entangled in one fully correlated light-cone, and must ultimately be analyzed together. This is a challenge because of complex gas processes, but the webskys we construct will learn from the highest resolution gasdynamical feedback simulations. HQP: Such work has been and is well suited for engagement of HQP locally at all levels at CITA: Senior RAs and postdocs, graduate and undergraduate research students.

这项研究将为 2019-2024 年以及 2012-18 年期间出现的大量宇宙微波背景 (CMB) 和大尺度结构 (LSS) 以及星系形成数据开发理论框架和分析工具。令人惊叹的是，在很大程度上通过我们在普朗克 CMB 卫星团队和更高分辨率上的活动，以高精度巩固了由暗能量和暗物质主导的宇宙学标准模型（SMc）阿塔卡马宇宙学望远镜 (ACT) 团队最近因提供“最大和最小尺度上的宇宙的明确描述”而获得了 2018 年格鲁伯宇宙学奖：该提案强调了计划中的工作。先进的 ACTPol 和西蒙斯天文台后续项目、相关的 CCATprime 望远镜、气球载蜘蛛实验的第二次飞行、CMB 与LSS 空间实验 Euclid 和其他地面 LSS 巡天，以及探测星系形成和聚集的各种三维线强度映射 (LIM) 实验的主要动机是寻找超越宇宙学标准模型 (BSMc) 的新物理。包括如何测量暗能量是否与物质耦合，暗物质的量子方面是否可观测，以及为早期宇宙中产生的新型非高斯原始结构创建统计测试。星际尘埃极化：CMB 的一个主要目标是发现具有 CMB 极化的早期宇宙引力波，最大的挑战是将极化的银河发射与真正的原始物质分开。为此，我们正在开发新的“银河系各向异性”重测方法。 “Way's interstellar web”偏振发射是一种新兴技术，用于绘制大型宇宙体积以探测银河系组装时代甚至前银河系。加拿大的CHIME射电望远镜瞄准的是21厘米氢线，COMAP瞄准的是一氧化碳线，现在正在获取数据，而CCATprime瞄准的是电离碳，我们CITA的小组正在建设中。这些巨大的新数据源将带来分析和理论挑战，包括可能出现的任何新的 BSMc 物理理论和模拟：我们将创建可快速计算但准确的 SMc 和 BSMc 模拟的集合。我们称之为交叉分析的网络天空，因为所有这些大天空实验都纠缠在一个完全相关的光锥中，并且最终必须一起分析，因为复杂的气体过程，这是一个挑战，但我们构建的网络天空将。从最高分辨率的气体动力学反馈模拟中学习：此类工作非常适合 CITA 各级本地 HQP 的参与：高级 RA 和博士后、研究生和本科生。