INSPIRE Track 1: Following the Carbon Trail in Planetary Formation

INSPIRE奖的部分资金来自数学和物理科学局天文科学部和多学科活动办公室的特别项目计划，以及地球科学局地球科学部的岩石学和地球化学计划。该项目结合了两个截然不同的领域（天文学和地球化学）的前沿研究，以显著推进对类地行星如何形成和发展生物圈的理解。主要目标集中在太阳星云中占主导地位的含碳分子是如何被纳入原始地球的，以及它们是如何在地球之间进行地质循环的。S内部和大气。这项工作将结合对行星形成盘的天文观测（与ALMA和Keck天文台），涉及熔岩的实验室实验，以及太阳星云中含碳化合物的天体化学建模，来限制碳向地球输送的模型。天文学家将使用阿塔卡马大型毫米/亚毫米阵列（ALMA）和凯克天文台分别获得星周圆盘中含碳分子的无线电和红外光谱，以测量气体和固相分子之间的碳预算是如何分配的，以及有多少碳被星光照射破坏（或化学减少）。与此同时，地球化学家将进行实验，以便更好地了解碳在内部和表面之间的循环，这在维持地球的稳定中起着重要作用。生物圈。他们的实验集中在来自周围行星形成环境和年轻地球熔融硅酸盐表面的物质之间的化学交换。实验将把碳质球粒陨石（来自阿连德和霍姆斯特德陨石）的样品置于不同的温度和压力下，然后测量碳的溶解度和分配。研究人员将在他们的研究中与研究生和博士后学者合作，并通过入门课程和网络接口工具与K-12系统的教师合作。

This INSPIRE award is partially funded by the Special Projects program of the Division of Astronomical Sciences and the Office of Multidisciplinary Activities, both in the Directorate for Mathematical and Physical Sciences, and by the the Petrology and Geochemistry Program in the Division of Earth Science in the Directorate for Geosciences.This project combines cutting-edge research from two intellectually distinct areas (astronomy and geochemistry) in order to significantly advance understanding of how terrestrial planets form and develop a biosphere. The main goal focuses on how dominant carbon-bearing molecules in the solar nebula were incorporated into the primordial Earth and how they were geologically cycled between the planet?s interior and atmosphere. This work will constrain models of carbon delivery to the Earth by combining astronomical observations of planet-forming disks (with ALMA and Keck observatories), laboratory experiments involving molten lava, and astrochemical modeling of carbon-bearing compounds in the solar nebula. The astronomers will use the Atacama Large Millimeter/Submillimeter ARRAY (ALMA) and Keck Observatory to obtain radio and infrared spectra, respectively, of carbon-bearing molecules in circumstellar disks to measure how the carbon budget is allocated between molecules in the gas and solid phase, and how much of it is destroyed (or chemically reduced) by starlight irradiation. In parallel, the geochemists will conduct experiments in order to better understand how carbon cycles between the interior and surface, which plays a large role in maintaining Earth?s biosphere. Their experiments focus on the chemical exchange between material from the surrounding planet-forming environment and the molten silicate surface of the young Earth. The experiments will subject samples made from carbonaceous chondrites (from Allende and Homestead meteorites) to varying temperatures and pressures and then measure solubility and partitioning of carbon. The researchers will work with graduate students and postdoctoral scholars in their research, and with teachers in the K-12 system through introductory courses and web-interface tools.