Collaborative Research: Exploring reionization and the cosmic dawn through cross-correlations

合作研究：通过互相关探索再电离和宇宙黎明

基本信息

批准号：
2205900
负责人：
Steven Furlanetto
金额：
$ 26.97万
依托单位：
University of California-Los Angeles
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=2205900&HistoricalAwards=false
关键词：
Collaborative Research Exploring reionization cosmic

项目摘要

Over the next several years, new astronomical observatories are poised to revolutionize our understanding of the earliest generations of galaxies to form in our Universe. The James Webb Space Telescope will provide an unprecedented census of these galaxies, while instruments such as the Simons Observatory and Hydrogen Epoch of Reionization Array will explore their impact on the surrounding Universe. However, maximizing the science return of these telescopes requires sophisticated modeling of this first generation of galaxies. This project is a collaboration between scientists at the University of Nevada, the University of California, Los Angeles, and Arizona State University, to develop a suite of flexible, powerful models for interpreting the up-coming observations from these powerful telescopes. As a part of this project, the team will also focus on providing research training for undergraduate students from underrepresented groups, and thus help diversify the next generation of astronomy researchers. In addition, the team will develop online teaching materials to engage children in the scientific process.This project has three principal aims. First, the proposing team will develop a series of new galaxy modeling tools to improve semi-numeric simulations of the Epoch of Reionization. Beginning with their existing analytic models of these galaxies, the team will add prescriptions for Lyman-alpha emission lines, which will then be combined with large-volume numerical simulations of the galaxy field. The team will use these models to study how reionization impacts the Lyman-alpha lines, not only in an average sense but also when applied to specific galaxy populations. Second, this project will develop tools for "cross-comparisons" between data sets. The goal is to explore how galaxy surveys can measure the large-scale density and ionization fields to inform measurements of the intergalactic medium, and the team will examine how low-frequency radio measurements can identify ionized regions to inform galaxy measurements. Finally, this project will forecast the results of cross-correlations between measurements of high-redshift galaxy surveys, the 21cm signal, line intensity mapping signals, and the cosmic microwave background.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.

在接下来的几年中，新的天文观测者有望彻底改变我们对宇宙中最早形成星系的最早银河系的理解。詹姆斯·韦伯（James Webb）太空望远镜将提供这些星系的前所未有的人口普查，而诸如Simons天文台和氢气时期的仪器将探索它们对周围宇宙的影响。但是，最大化这些望远镜的科学回报需要对第一代星系进行复杂的建模。该项目是内华达大学，加利福尼亚大学，洛杉矶大学和亚利桑那州立大学的科学家之间的合作，开发了一套灵活，有力的模型，用于解释这些强大的望远镜的上升观察。作为该项目的一部分，该团队还将专注于为来自代表性不足的小组的本科生提供研究培训，从而有助于多样化下一代天文学研究人员。此外，团队将开发在线教材，使儿童参与科学过程。该项目具有三个主要目标。首先，提议团队将开发一系列新的Galaxy建模工具，以改善对电离时代的半数字模拟。从他们现有的这些星系的分析模型开始，该团队将为Lyman-Alpha排放线添加处方，然后将其与星系字段的大量数值模拟结合使用。该团队将使用这些模型来研究电离如何影响Lyman-Alpha线路，这不仅在平均意义上，而且在应用于特定的星系群体时。其次，该项目将在数据集之间开发用于“跨综合子”的工具。目的是探索银河系调查如何测量大规模密度和电离磁场以告知播层间介质的测量，团队将检查低频无线电测量方法如何识别电离区域以告知星系测量。最后，该项目将预测高红色星系调查测量，21cm信号，线强度映射信号和宇宙微波背景之间的互相关结果。该奖项反映了NSF的法定任务，并通过使用基金会的知识优点和广泛影响来评估NSF的法定任务。