Galactic Archaeology: Constraining the Origin of the Elements with Empirical and Theoretical Supernova Yields

Emily Griffith被授予美国国家科学基金会天文学和天体物理学奖学金，在科罗拉多大学开展一项研究和教育计划。格里菲斯将把大型光谱调查的新观测结果与超新星和演化恒星中产生的元素的理论产量结合起来。这个项目的结果将使天文学家了解元素的起源以及银河系和麦哲伦星云的化学富集历史。对于该项目的教育部分，格里菲斯将制定一个导师培训计划，以提高对科学领域代表性不足的学生的保留，她将开发一个包含最新研究的天文馆展览。该项目将利用数百万颗恒星的高质量光谱数据来确定核心坍缩超新星（CCSN）， Ia型超新星（SNIa）和渐近巨星分支（AGB）恒星对银河系盘和凸起以及麦哲伦云的化学富集的相对贡献。通过对观测数据和理论数据的详细比较，Griffith将探索二元相互作用对CCSN产率的影响，并确定诊断SNIa富集通道的元素产率比。她还将构建一个已知富集的模拟恒星群来测试她的理论模型，并确定SNIa和AGB等延迟富集源在观测恒星群上留下的丰度特征。该奖项反映了美国国家科学基金会的法定使命，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，被认为值得支持。

Emily Griffith is awarded an NSF Astronomy and Astrophysics Fellowship to carry out a program of research and education at the University of Colorado. Griffith will combine new observational results from large spectroscopic surveys with theoretical yields of elements produced in supernovae and evolved stars. Results from this project will allow astronomers to understand the origin of the elements and the chemical enrichment history of the Milky Way galaxy and the Magellanic Clouds. For the education component of this project, Griffith will develop a mentor training program to improve the retention of underrepresented students in science, and she will develop a planetarium show incorporating the latest research.This project will exploit high quality spectroscopic data for millions of stars to determine the relative contribution of core collapse supernovae (CCSN), Type Ia supernovae (SNIa), and Asymptotic Giant Branch (AGB) stars to the chemical enrichment of the Galactic disk and bulge, and the Magellanic Clouds. Through a detailed comparison of observational and theoretical data, Griffith will explore the impact of binary interactions on CCSN yields and identify elemental yield ratios that are diagnostic of SNIa enrichment channels. She will also construct a simulated stellar population with known enrichment to test her theoretical model and identify the abundance signatures that delayed enrichment sources such as SNIa and AGB stars imprint on observed stellar populations.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.