CAREER: GLOW: The Long-Term Histories of Geologically Active Solar System Moons from Isotope Geochemistry

职业：发光：同位素地球化学中地质活跃的太阳系卫星的长期历史

• 批准号: 2238344
• 负责人: Katherine de Kleer
• 金额: $ 86.65万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2028-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2238344&HistoricalAwards=false
• 关键词: CAREER; GLOW; Long; Term; Histories

The investigator, Dr. Katherine de Kleer of the California Institute of Technology, has developed experiments to measure gases released from the interiors of bodies in the outer Solar System. When the Earth and our planet neighbors are viewed within the Solar System today, we see only a snapshot of their full lifetimes. In order to put this snapshot in context, the investigator would like to understand their long-term histories, or how they got to be the way they are today. On worlds, like Earth, that have active geology (plate tectonics, volcanism etc), the signatures that we might use to study their past have been erased. Measurements of chemical elements with slightly different masses provide a rare opportunity to study the more distant histories of planets. With new telescopes, these measurements are only now becoming possible for the outer part of the Solar System. The investigator and her research group will use new telescope observations study the evolution of Solar System moons and dwarf planets. By combining these observations with models, this work will advance understanding of the heat flow and mass loss histories of these worlds. The program will involve students from undergraduate to PhD level, as well as postdoctoral scholars. It will additionally train young scientists in producing innovative, interactive science content for the public, tailored to a range of settings.This project applies established techniques in isotope geochemistry to geologically-active moons observed with astronomical methods, thus bridging the disciplines of astronomy, geology, and geochemistry. It will specifically provide insight into: the longevity of tidal heating at the galilean satellites; the mass loss and surface-interior exchange processes at Enceladus; and the formation and migration histories of captured moons. The project will utilize new observations from the Atacama Large (sub-)Millimeter Array, which will be interpreted using models that will consider all isotope reservoirs and exchange rates for the relevant species, enabling robust bounds on formation and evolutionary scenarios. The results will address fundamental open questions about these objects, and will establish the abiotic isotope background for Solar System moons, an important first step towards using isotopes as biosignatures.Co-funding was provided by the Division of Astronomy and Division of Earth Sciences through a partnership focused on Geoscience Lessons for and from Other Worlds (GLOW).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.

加利福尼亚理工学院的研究者凯瑟琳·德·克莱尔（Katherine de Kleer）博士开发了实验，以测量外部太阳系内部室内释放的气体。当今天在太阳系中观看地球和我们的星球邻居时，我们只看到了他们一生的快照。为了将此快照放在上下文中，调查人员想了解他们的长期历史，或者他们如何成为今天的方式。在像地球一样具有活性地质（板块构造，火山主义等）的世界上，我们可能用来研究其过去的签名已被删除。对具有略有不同质量的化学元素的测量为研究行星的遥远历史提供了难得的机会。借助新的望远镜，这些测量结果直到太阳系的外部才有可能。研究人员及其研究小组将使用新的望远镜观测研究，研究太阳系卫星和矮星的演变。通过将这些观察结果与模型相结合，这项工作将提高对这些世界的热流和质量损失历史的了解。该计划将涉及从本科到博士学位的学生以及博士后学者。它还将培训年轻科学家为公众量身定制的创新，交互式科学内容，该项目适用于各种环境。该项目将同位素地球化学的既定技术应用于使用天文学方法观察到的地质活性月亮，从而弥合了天文学，地质学和地球化学的学科。它将专门提供有关以下深刻的洞察力：加利利卫星在潮汐加热的寿命；土生土的质量损失和表面间交换过程；以及被捕获的卫星的形成和迁移历史。该项目将利用Atacama大（亚）毫米阵列的新观察结果，该阵列将使用模型来解释，这些模型将考虑所有同位素储层和相关物种的汇率，从而实现了形成和进化方案的稳健界限。结果将解决有关这些物体的基本开放问题，并将建立太阳系卫星的非生物同位素背景，这是将同位素作为生物签名作为生物签名的重要第一步。Co筹集是由地球科学的划分和地球科学部的划分通过伙伴关系的伙伴关系而集中在其他世界上的地理位置和奖励（Glow and Satsf）。使用基金会的智力优点和更广泛的影响评估标准进行评估。