MMESSH - Utilising Meteorite Magnetism to Elucidate Early Solar System History

MMESSH - 利用陨石磁性阐明早期太阳系历史

• 批准号: EP/Y014375/1
• 负责人: James Bryson
• 金额: $ 160.02万
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FY014375%2F1
• 关键词: MMESSH; Utilising; Meteorite; Magnetism; Elucidate

Within just 5-10 million years following the ignition of a star, the turbulent protoplanetary disk of dust and gas that surrounds this young celestial object can transform into an organised system of planetary bodies. This transition progresses via an elaborate series of processes, the variable natures of which act to establish the essential properties of each planet that dictate its long-term evolution. Cutting-edge models demonstrate that the early stages in this sequence are mediated by the styles and rates with which gas, micrometre-scale dust, millimetre-scale solids, and centimetre-scale aggregates move through a disk. Hence, the dynamic properties of a disk act as the foundation of planet building, with the legacy of these motions being felt in essentially every aspect of a planet's behaviour over its lifetime, including its ability to support life. Despite its importance, the dynamic properties of the disk that formed our solar system - primarily the locations of solid formation and accretion of the first planetary bodies - are critically poorly constrained, limiting our basic understanding of how and why planets exhibit their wealth of observed behaviours. In this project, I will utilise pioneering measurements, novel samples, and sophisticated models of the magnetic field that threaded our disk to uncover this pivotal spatial information from the magnetic records carried by meteorites. Combined with pre-existing isotopic compositions, this knowledge will unlock the essential dynamic properties of our disk, enabling me to address the gaps that exist in our current models of planet building. Hence, MMESSH will culminate in a next-generation model of this process rooted in a step change in our understanding of its fundamental stages, which I will employ to explore with unprecedented depth and clarity the origins of the diverse behaviours exhibited by planets in our solar system and beyond, and the early processes that led to Earth fostering complex life.

在星星点火后的短短500万至1000万年内，围绕着这个年轻天体的尘埃和气体的湍流原行星盘可以转变为一个有组织的行星体系统。这种转变是通过一系列复杂的过程进行的，这些过程的可变性质决定了每个行星的基本属性，这些属性决定了它们的长期演化。最先进的模型表明，在这个序列的早期阶段介导的风格和速率与气体，微米级的灰尘，毫米级的固体，厘米级的聚集体通过磁盘移动。因此，圆盘的动态特性是行星建造的基础，这些运动的遗产在行星一生中的行为的基本每个方面都可以感受到，包括其支持生命的能力。尽管它的重要性，形成我们的太阳系的磁盘的动力学特性-主要是固体形成和第一个行星体吸积的位置-受到严重的限制，限制了我们对行星如何以及为什么表现出丰富的观测行为的基本理解。在这个项目中，我将利用开创性的测量，新颖的样本和复杂的磁场模型，通过我们的磁盘来揭示陨石携带的磁记录中的关键空间信息。结合先前存在的同位素组成，这些知识将解开我们磁盘的基本动力学特性，使我能够解决我们目前行星建造模型中存在的差距。因此，MMESSH将在这一过程的下一代模型中达到高潮，这一模型植根于我们对其基本阶段的理解的一步变化，我将用它来以前所未有的深度和清晰度探索太阳系内外行星所表现出的不同行为的起源，以及导致地球孕育复杂生命的早期过程。