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

银河考古学：用经验和理论超新星产量来限制元素的起源

• 批准号: 2202135
• 负责人: Emily Griffith
• 金额: $ 30万
• 依托单位: Griffith, Emily J
• 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=2202135&HistoricalAwards=false
• 关键词: Galactic; Archaeology; Constraining; Origin; Elements

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.

艾米丽·格里菲斯被授予美国国家科学基金会天文学和天体物理学奖学金，以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测量的新观测结果与超新星和演化恒星产生的元素的理论产额结合起来。该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史。对于该项目的教育部分，格里菲斯将开发一项导师培训计划，以提高未被充分代表的学生在科学领域的留存率，她还将开发一个包含最新研究成果的天文馆展览。该项目将利用数百万恒星的高质量光谱数据来确定核心塌缩超新星(CCSN)、Ia型超新星(SNIa)和渐近巨星分支(AGB)恒星对银盘和凸起以及麦哲伦云化学浓缩的相对贡献。通过对观测数据和理论数据的详细比较，格里菲斯将探索二元相互作用对CCSN产量的影响，并确定可以诊断SNIa浓缩通道的元素产额比。她还将构建一个具有已知丰度的模拟恒星群，以测试她的理论模型，并确定延缓丰度来源(如SNIa和AGB星)在观测到的恒星群上留下的丰度特征。这一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智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Untangling the Sources of Abundance Dispersion in Low-metallicity Stars

解开低金属丰度恒星丰度色散的来源

• DOI: 10.3847/1538-4357/aca659
• 发表时间: 2023
• 期刊: The Astrophysical Journal
• 作者: Griffith, Emily J.;Johnson, Jennifer A.;Weinberg, David H.;Ilyin, Ilya;Johnson, James W.;Rodriguez-Martinez, Romy;Strassmeier, Klaus G.
• 通讯作者: Strassmeier, Klaus G.