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Galactic HII Regions & Milky Way Structure

银河HII区域

基本信息

批准号：
2202340
负责人：
Trey Wenger
金额：
$ 30万
依托单位：
Wenger, Trey Vaughn
依托单位国家：
美国
项目类别：
Fellowship Award
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=2202340&HistoricalAwards=false
关键词：
Galactic HII Regions Milky Way

项目摘要

Trey Wenger is awarded an NSF Astronomy and Astrophysics Fellowship to carry out a program of research and education at the University of Wisconsin. Wenger will use large high-quality observational surveys of H II regions – the bubbles of ionized gas around young hot stars – to create the most comprehensive map of the chemical and morphological structure of the Milky Way galaxy. Results from the study will advance our understanding of how the Galaxy formed and evolved. For the educational component of this project, Wenger will develop materials to broaden the use of small radio telescopes as an instructional tool for non-major astronomy courses and public outreach.Using existing and new observations of H I absorption, radio recombination lines, and radio continuum, this research project will yield the most comprehensive picture of the Milky Way’s present day morphological and chemical structure. To achieve that goal, the investigator will: (1) determine the origin of apparent ionized gas velocity gradients serendipitously discovered in hundreds of Galactic H II regions; (2) resolve the kinematic distance ambiguity for approximately 100 newly discovered H II regions; (3) create the first Galaxy-wide map of H II region metallicities; and (4) apply a novel machine learning technique to infer the morphological structure of the Milky Way’s high-mass star-forming region population.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.

Trey Wenger被授予NSF天文学和天体物理学奖学金，在威斯康星州大学开展研究和教育计划。 Wenger将使用H II区域的大型高质量观测调查-年轻热恒星周围的电离气体气泡-来创建银河系化学和形态结构的最全面的地图。这项研究的结果将促进我们对银河系如何形成和演化的理解。在这个项目的教育部分，温格将开发材料，以扩大使用小型射电望远镜作为非主要天文学课程和公众宣传的教学工具。利用现有的和新的观测H I吸收，射电复合线，和无线电连续，这个研究项目将产生最全面的图片银河系的今天的形态和化学结构。为了实现这一目标，研究人员将：（1）确定在数百个银河系H II区偶然发现的表观电离气体速度梯度的起源;（2）解决大约100个新发现的H II区的运动学距离模糊性;（3）创建第一个银河系范围的H II区金属丰度图;以及（4）应用新的机器学习技术来推断银河系大质量星星的形态结构-该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的评估被认为是值得支持的。影响审查标准。