Postdoctoral Fellowship: AAPF: Little Galaxies, Big Impact: New Insights through Highly-Resolved Simulations of Early Dwarf Galaxies

博士后奖学金：AAPF：小星系，大影响：通过早期矮星系高分辨率模拟的新见解

• 批准号: 2303858
• 负责人: Kaley Brauer
• 金额: $ 33万
• 依托单位: Brauer, Kaley
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-07-01 至 2026-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2303858&HistoricalAwards=false
• 关键词: Postdoctoral; Fellowship; AAPF; Little; Galaxies

Kaley Brauer is awarded an NSF Astronomy and Astrophysics Postdoctoral Fellowship to carry out a program of research and education at the Harvard-Smithsonian Center for Astrophysics. Dr. Brauer will conduct research to study how stars formed in the earliest galaxies. To do this, she will produce cosmological simulations of dwarf galaxies with individual stars, detailed chemical yields, and highly-resolved metal mixing. Stars from the smallest galaxies, called “ultra-faint dwarf" galaxies, are relics from the era of the first stars and galaxies, preserving clean signatures of early chemical enrichment. They are also poorly-understood ingredients in the formation history of the Milky Way. To improve accessibility to astronomy and space science, Dr. Brauer will write andillustrate a series of astronomy children’s books and freely distribute them to Boston-area schools through interactive visits to second-grade science classrooms. She will also organize and run a free weekend-long summer camp to inspire and introduce middle-school-aged young women to space science.This work will provide the theoretical support necessary to reveal insights about early galaxy formation (differences in hierarchical formation) and chemical enrichment (differences in nucleosynthetic yields) that are contained within the full distribution of chemical abundance patterns. She will quantify the origin of observed chemical abundance scatter as well as how metals mix in the interstellar medium of early galaxies and how this varies with different elements and different nucleosynthetic channels. Additionally, Dr. Brauer will quantify the low-mass end of the Milky Way assembly history by comparing simulated abundance distributions to observations of the Milky Way stellar halo.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.

Kaley Brauer被授予NSF天文学和天体物理学博士后奖学金，在哈佛-史密森天体物理中心开展研究和教育计划。 布劳尔博士将进行研究，研究恒星如何在最早的星系中形成。 为了做到这一点，她将产生矮星系的宇宙学模拟与个别恒星，详细的化学产额，和高分辨率的金属混合。来自最小星系的恒星，被称为“超暗矮”星系，是第一批恒星和星系时代的遗迹，保留了早期化学富集的清晰特征。它们也是银河系形成历史中知之甚少的成分。 为了提高天文学和空间科学的可及性，Brauer博士将编写和展示一系列天文学儿童读物，并通过对二年级科学教室的互动访问，将其免费分发给波士顿地区的学校。 她还将组织和运行一个免费的周末夏令营，以激励和介绍中学年龄的年轻女性空间科学。这项工作将提供必要的理论支持，揭示有关早期星系形成（层次形成的差异）和化学富集（核合成产率的差异）的见解，包含在化学丰度模式的完整分布。她将量化观察到的化学丰度散射的起源，以及金属如何在早期星系的星际介质中混合，以及这如何随不同元素和不同核合成通道而变化。此外，Brauer博士将通过比较模拟的丰度分布和银河系恒星晕的观测结果，量化银河系组装历史的低质量端。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影响审查标准进行评估，被认为值得支持。