Planetesimal formation, giant planet migration, and stellar accretion in our solar system and beyond

太阳系内外的小行星形成、巨行星迁移和恒星吸积

• 批准号: 2102591
• 负责人: Graham Edwards
• 金额: $ 30万
• 依托单位: Edwards, Graham Harper
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-10-01 至 2024-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2102591&HistoricalAwards=false
• 关键词: Planetesimal; formation; giant; planet; migration

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2). Graham Edwards is awarded an NSF Astronomy and Astrophysics Postdoctoral Fellowship to conduct a program of research and education at Dartmouth College. Edwards will perform a computational statistical study of meteorite chemical composition to elucidate planetary formation processes in the early Solar System. Results from this study will refine our understanding of the history of the Solar System and inform models of extrasolar systems. For the education component of this project, Edwards will develop a museum outreach program to explore how scientists use meteorites to study Solar System history and planet formation.This project will extract meteorite chemical compositions from the largest centralized collection of publicly available meteorite data to study (1) relationships between meteorites and their constituent components, (2) timescales of giant planet migration, and (3) the role of the protoplanetary disk in shaping the solar composition. This statistical study will test whether bulk chemical clustering improves upon standard methods of grouping meteorites into families and whether constituent chondrites or chondrite matrices formed from a shared reservoir of material. The project will also test whether the deficit of refractory elements in the solar photosphere is due to their preferential incorporation in protoplanetary bodies.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.

该奖项的全部或部分资金根据《2021 年美国救援计划法案》（公法 117-2）提供。 格雷厄姆·爱德华兹获得美国国家科学基金会天文学和天体物理学博士后奖学金，在达特茅斯学院开展研究和教育项目。 爱德华兹将对陨石化学成分进行计算统计研究，以阐明早期太阳系的行星形成过程。 这项研究的结果将加深我们对太阳系历史的理解，并为太阳系外系统的模型提供信息。 对于该项目的教育部分，爱德华兹将制定一个博物馆外展计划，探索科学家如何利用陨石来研究太阳系历史和行星形成。该项目将从最大的集中公开陨石数据集中提取陨石化学成分，以研究（1）陨石及其组成成分之间的关​​系，（2）巨行星迁移的时间尺度，以及（3）陨石的作用 原行星盘塑造太阳的组成。 这项统计研究将测试大量化学聚类是否改进了将陨石分组为族的标准方法，以及是否由共享的材料库形成球粒陨石或球粒陨石基质。 该项目还将测试太阳光球层中难熔元素的不足是否是由于它们优先融入原行星体所致。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。