CAREER: Mapping the Fuel for Star Formation Across Cosmic History

职业：绘制宇宙历史中恒星形成的燃料图

基本信息

批准号：
1653228
负责人：
Daniel Marrone
金额：
$ 79.03万
依托单位：
University of Arizona
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-07-01 至 2024-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1653228&HistoricalAwards=false
关键词：
CAREER Mapping Fuel Star Formation

项目摘要

Molecular gas is the raw material for star formation in galaxies. To understand how the total stellar mass of the universe was formed, we must understand how the fuel for star formation has been assembled and consumed over cosmic history. This project will measure the molecular gas content of the universe over most of its history, beginning more than 10 billion years ago, using the "intensity mapping" technique. Intensity mapping aggregates the signal from numerous undetectable galaxies to capture the distribution of molecular gas through three-dimensional volumes of the universe, across the sky and back into cosmic history. To achieve this goal, the team will mine the archives of the largest radio telescopes and conduct new experiments using advanced instruments. This project includes a focused effort to improve the teaching of important science topics through radio technology, from non-science undergraduates through astronomy graduate students. The implementation of this work is centered on paid research experiences for cohorts of STEM majors who are at risk of leaving the university.The proposed research will measure the growth and consumption of molecular gas across the last 10 billion years of cosmic history. Molecular gas is the raw material that powers the process of star formation in galaxies, and a chart of its history can contribute significantly to our understanding of the process of galaxy formation. Unlike the stars themselves, the cold gas from which they form is very faint and hard to observe beyond the nearby universe. The proposed project will overcome this challenge through the technique of "intensity mapping," in which the light from tens of thousands of galaxies is integrated together to generate a detectable signal despite the fact that few of the galaxies can be seen individually. The team will use a variety of data sources to assemble a comprehensive picture of the molecular fuel, including archival data from radio telescope arrays and experiments designed specifically for this type of measurement. The work will culminate in a large program of intensity mapping with the TIME multi-pixel spectrometer, which will be installed on the 12m ALMA prototype antenna of the Arizona Radio Observatory. As part of this program, the PI will use radio science and digital signal processing hardware to enhance the teaching of critical science topics at all levels, from undergraduate general education to upper division majors and graduate students. These activities will provide research experience to cohorts of students from the university's ASEMS program, which increases the persistence of STEM majors, particularly those who are first-in-family students, from low-income households, community college transfers, and/or members of groups underrepresented in STEM.

分子气体是星系中恒星形成的原料。为了了解宇宙的恒星总质量是如何形成的，我们必须了解恒星形成的燃料在宇宙历史中是如何聚集和消耗的。该项目将使用“强度测绘”技术测量宇宙从 100 亿多年前开始的大部分历史中的分子气体含量。强度测绘聚集了来自众多无法探测到的星系的信号，以捕获分子气体在宇宙三维空间中的分布，穿过天空并返回宇宙历史。为了实现这一目标，该团队将挖掘最大射电望远镜的档案，并使用先进仪器进行新的实验。该项目致力于通过无线电技术改善从非科学本科生到天文学研究生的重要科学主题的教学。这项工作的实施重点是为面临离开大学风险的 STEM 专业学生群体提供有偿研究经验。拟议的研究将测量过去 100 亿年宇宙历史中分子气体的增长和消耗。分子气体是为星系中恒星形成过程提供动力的原材料，其历史图表可以为我们理解星系形成过程做出重大贡献。与恒星本身不同，它们形成的冷气体非常微弱，很难在附近的宇宙之外观察到。拟议的项目将通过“强度映射”技术克服这一挑战，其中来自数以万计的星系的光被整合在一起以生成可检测的信号，尽管事实上很少有星系可以单独看到。该团队将使用各种数据源来收集分子燃料的全面图片，包括来自射电望远镜阵列的档案数据和专门为此类测量设计的实验。这项工作将最终形成一个使用 TIME 多像素光谱仪进行强度测绘的大型计划，该计划将安装在亚利桑那射电天文台的 12m ALMA 原型天线上。作为该计划的一部分，PI 将使用无线电科学和数字信号处理硬件来加强从本科普通教育到高年级专业和研究生的各个级别的关键科学主题的教学。这些活动将为来自大学 ASEMS 项目的学生群体提供研究经验，从而提高 STEM 专业的坚持性，特别是那些来自低收入家庭、社区大学转学和/或家庭成员的第一家庭学生。 STEM 中代表性不足的群体。

项目成果

期刊论文数量（7）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

An Intensity Mapping Detection of Aggregate CO Line Emission at 3 mm

3 mm 处 CO 线总排放的强度映射检测

DOI：
10.3847/1538-4357/abb08e
发表时间：
2020
期刊：
The Astrophysical Journal
影响因子：
0
作者：
Keating, Garrett K.;Marrone, Daniel P.;Bower, Geoffrey C.;Keenan, Ryan P.
通讯作者：
Keenan, Ryan P.

A survey of CH2DOH towards starless and pre-stellar cores in the Taurus molecular cloud

对金牛座分子云中无星和前恒星核心的 CH2DOH 调查

DOI：
10.1093/mnras/staa3649
发表时间：
2020
期刊：
Monthly Notices of the Royal Astronomical Society
影响因子：
4.8
作者：
Ambrose, Hannah E;Shirley, Yancy L;Scibelli, Samantha
通讯作者：
Scibelli, Samantha

Probing Cosmic Reionization and Molecular Gas Growth with TIME

DOI：
10.3847/1538-4357/abfe62
发表时间：
2020-12
期刊：
The Astrophysical Journal
影响因子：
0
作者：
Guochao Sun;T. Chang;B. Uzgil;J. Bock;C. Bradford;V. Butler;Tessalie Caze-Cortes;Yun-Ting Cheng-Yun-Ting-C
通讯作者：
Guochao Sun;T. Chang;B. Uzgil;J. Bock;C. Bradford;V. Butler;Tessalie Caze-Cortes;Yun-Ting Cheng-Yun-Ting-C

Biases and Cosmic Variance in Molecular Gas Abundance Measurements at High Redshift

高红移下分子气体丰度测量的偏差和宇宙方差