The CO-Mapping Array Pathfinder Survey - A New Window on Cosmic Evolution

联合测绘阵列探路者巡天——宇宙演化的新窗口

• 批准号: 2206834
• 负责人: Kieran Cleary
• 金额: $ 115.11万
• 依托单位: California Institute of Technology
• 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=2206834&HistoricalAwards=false
• 关键词: CO; Mapping; Array; Pathfinder; Survey

Principal Investigator Cleary and his team are studying galaxies during the epoch of galaxy assembly, which reached its peak when the Universe was a few billion years old. Because most galaxies are faint and difficult to observe, astronomers often look at individual bright galaxies, that are not representative of the whole. Instead, the team are using a new technique where they take a series of low resolution “blurry” images of the sky using telescopes that are designed to detect radio emission from carbon monoxide molecules. These blurry images are the sum of the radio emission from the gas in many galaxies, faint and bright. Careful analysis of the data will help us understand how these early galaxies grew through the conversion of gas into stars, paving the way for future studies looking even further back in time. To broaden participation the team are collaborating with the Goldstone Apple Valley Radio Telescope and the Lewis Center for Educational Research to train teachers in the use of a 34 m radio telescope. The teachers and their students will observe the radio sky in real-time from their classroom. In addition, the team will develop classroom activities specific to their research.The CO Mapping Array Project (COMAP) uses line intensity mapping (LIM) of carbon monoxide (CO) to trace the distribution and global properties of galaxies over cosmic time, back to the Epoch of Reionization. This project will complete the on-going 5-year survey of 12 sq. deg. to detect the CO signal from z~3. Analysis should lead to a detection of the CO(1-0) power spectrum and the CO-galaxy cross spectrum, leading to detections of the clustering amplitude and constraints on the cosmic molecular gas abundance and star formation history at z=2.4-3.4.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.

首席研究员Cleary和他的团队正在研究星系组装时代的星系，当宇宙几十亿岁时达到顶峰。 由于大多数星系都很微弱，难以观察，天文学家经常观察单个明亮的星系，这些星系并不能代表整个星系。相反，该团队正在使用一种新技术，他们使用旨在检测一氧化碳分子无线电发射的望远镜拍摄一系列低分辨率“模糊”的天空图像。这些模糊的图像是许多星系中气体的无线电发射的总和，有暗的，也有亮的。对数据的仔细分析将帮助我们了解这些早期星系是如何通过气体转化为恒星而成长的，为未来的研究铺平了道路。为了扩大参与，该小组正在与戈德斯通苹果谷射电望远镜和刘易斯教育研究中心合作，培训教师使用34米射电望远镜。教师和学生将从教室实时观察无线电天空。此外，该团队还将开展针对其研究的课堂活动。CO映射阵列项目（COMAP）使用一氧化碳（CO）的线强度映射（LIM）来追踪宇宙时间内星系的分布和全球性质，追溯到再电离时代。该项目将完成正在进行的12平方米的5年调查。°的以检测来自z~3的CO信号。分析应导致CO（1-0）功率谱和CO-星系交叉谱的检测，导致在z=2.4- 3.4处对宇宙分子气体丰度和星星形成历史的聚类幅度和约束的检测。该奖项反映了NSF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而被认为值得支持。

项目成果

A Water Vapor Radiometer for the CO Mapping Array Project (COMAP)

用于 CO 测绘阵列项目 (COMAP) 的水蒸气辐射计

• DOI: 10.23919/usnc-ursinrsm57470.2023.10043109
• 发表时间: 2023
• 期刊: 2023 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM
• 作者: Kim, Junhan;Cleary, Kieran A.;O’Neill, Sandra;Lamb, James W.;Woody, David P.;Harris, Andrew I.;Dunne, Delaney A.;Catha, Morgan;Hobbs, Richard;Kocz, Jonathon
• 通讯作者: Kocz, Jonathon