The Origin of the Elements in the Milky Way and Its Closest Neighbors

银河系及其最近邻元素的起源

• 批准号: 2307621
• 负责人: David Weinberg
• 金额: $ 45.74万
• 依托单位: Ohio State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2307621&HistoricalAwards=false
• 关键词: Origin; Elements; Milky; Way; Its

Understanding the origin and distribution of the elements is essential for understanding the processes that govern galaxy formation. This research project comprises a program of data analysis and modeling to interpret the elemental abundance patterns of stars in the Milky Way and its dwarf satellite galaxies observed by large spectroscopic surveys. Results from the project will allow astronomers to build a coherent picture of stellar and galactic scale phenomena that govern the synthesis of the elements. The project will train a graduate student in methods of advanced astronomical analysis and support a program of research mentoring for undergraduate students.Building upon models developed by the research team, the studies undertaken will yield strong empirical constraints on the contributions of core collapse supernovae, Type Ia supernovae, and asymptotic giant branch stars to the observed stellar elemental abundance patterns. They will provide stringent tests of Milky Way chemical evolution models that explore different assumptions about accretion and star formation history, galactic winds, fountains, radial gas flows, and stochastic enrichment events, as well as incomplete mixing in the interstellar medium. They will also yield new insights on the origin of chemical abundance differences between the components of the Milky Way (thin disk, thick disk, bulge, halo) and between the Milky Way and its dwarf satellites.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.

了解元素的起源和分布对于理解控制星系形成的过程至关重要。该研究项目包括一个数据分析和建模程序，以解释银河系中恒星的元素丰度模式及其矮人卫星星系，该星系被大型光谱调查观察到。该项目的结果将使天文学家能够建立控制元素综合的恒星和银河量表现象的连贯图片。该项目将培训一名研究生，以进行高级天文分析的方法，并支持针对本科生的研究计划。建立研究团队开发的模型，研究将对核心崩溃超新星，IA型超新星，IA型巨大的巨型分支星星，和渐进的巨型分支星星和观察到的Stellar elemental exellar elemental Arbunds的贡献产生强烈的经验约束。他们将提供对银河系化学演化模型的严格测试，这些测试探讨了有关吸积和恒星形成历史，银河风，喷泉，径向气流和随机富集事件的不同假设，以及在星际介质中的不完整混合。他们还将对银河系组成部分（薄磁盘，厚磁盘，凸起，光晕）之间的化学丰度差异的起源以及其矮人卫星之间的新见解。这一奖项反映了NSF的法定任务，并被认为是通过基金会的知识优点和广泛的crietia criitia的评估来通过评估来进行评估的，并值得通过评估。