CAREER: GLOW: Linking the atmospheric and bulk compositions of rocky exoplanets: Constraints from meteorite outgassing analyses

职业：GLOW：将岩石系外行星的大气和本体成分联系起来：陨石释气分析的限制

• 批准号: 2239225
• 负责人: Myriam Telus
• 金额: $ 73.44万
• 依托单位: University of California-Santa Cruz
• 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: 2023-07-01 至 2028-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2239225&HistoricalAwards=false
• 关键词: CAREER; GLOW; Linking; atmospheric; bulk

The investigator, Dr. Myriam Telus of the University of California-Santa Cruz, has developed experiments to measure gases released when meteorites are heated to the high temperatures occurring during planet formation. These experiments are used to understand the link between the interior and atmospheres of rocky planets. This work also provides hands-on research experience for students at both the undergraduate and graduate level. There is still much that is not understand about atmospheres, the layer of gases surrounding planets. Rocky planets, like the Earth, may form atmospheres during the early stages of their formation. Planet atmospheres form when gas is released from the planet due to heating within its interior. Meteorites are left over rocky material from the early stages of planet formation. They provide a unique way to link the initial makeup of atmospheres to the ingredients that went into building planets. This connection is important because planets are not easily observed by telescopes; the main window into other worlds is through their atmospheres. The investigator will determine the composition of meteorite outgassing species, especially those relevant for exoplanet observations such as H2O, CO, CO2, and CH4. The objectives are to 1) use a thermogravimetric analyzer combined with a small gas chromatograph system to measure the outgassing of gas species for various meteorite types at temperatures up to 1600°C and under various redox conditions and 2) use complementary geochemical techniques to track changes in the bulk composition and mineralogy of outgassing residues. These experiments are relevant for rocky planets, including those around Sun-like stars, those that formed in more oxidizing conditions, hot rocky planets, and those that experience open-system conditions. This research can provide foundational data for observing, modeling, and interpreting atmospheric signatures of exoplanets. The experimental approach of this investigator is an important shift from model-based methods typically used to address this connection.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.

这位研究人员是加州大学圣克鲁斯分校的米里亚姆·特卢斯博士，他已经开发了实验来测量陨石在行星形成过程中被加热到高温时释放的气体。这些实验被用来了解岩石行星的内部和大气之间的联系。这项工作还为本科生和研究生提供了实践研究经验。关于大气层，也就是行星周围的气体层，仍有许多不了解的地方。岩石行星和地球一样，可能在其形成的早期阶段形成大气层。行星大气层是由于行星内部的加热而从行星释放出气体时形成的。陨石是行星形成早期留下的岩石物质。它们提供了一种独特的方式，将大气的初始组成与建造行星所需的成分联系起来。这种联系很重要，因为行星不容易被望远镜观测到；进入其他世界的主要窗口是通过它们的大气层。调查人员将确定陨石放气物质的组成，特别是那些与系外行星观测相关的物质，如H2O、CO、CO2和CH4。其目标是1)使用热重分析仪和小型气相色谱系统相结合，测量温度高达1600°C和各种氧化还原条件下不同类型陨石的气体物种的出气情况，以及2)使用互补的地球化学技术来跟踪出气残留物的主体成分和矿物学的变化。这些实验与岩石行星有关，包括类太阳恒星周围的行星，在氧化程度更高的条件下形成的行星，炎热的岩石行星，以及那些经历开放系统条件的行星。这项研究可以为观测、模拟和解释系外行星的大气特征提供基础数据。这位研究人员的实验方法与通常用于解决这种联系的基于模型的方法相比是一个重要的转变。天文学部门和地球科学部门通过一个专注于为其他世界和来自其他世界的地球科学课程(GLOW)的合作伙伴关系提供共同资助。这个奖项反映了NSF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。