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.

在恒星点燃后的短短 5-1000 万年内，围绕着这个年轻天体的由尘埃和气体组成的湍流原行星盘就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，这些属性决定了其长期演化。尖端模型表明，该序列的早期阶段是由气体、微米级尘埃、毫米级固体和厘米级聚集体在圆盘中移动的方式和速率调节的。因此，圆盘的动态特性是行星构建的基础，这些运动的遗产在行星一生中行为的各个方面基本上都能感受到，包括其支持生命的能力。尽管它很重要，但形成我们太阳系的圆盘的动态特性——主要是固体形成和第一颗行星体吸积的位置——受到的限制非常少，限制了我们对行星如何以及为何表现出丰富的观察到的行为的基本理解。在这个项目中，我将利用开创性的测量、新颖的样本和穿过磁盘的复杂磁场模型，从陨石携带的磁记录中揭示这一关键的空间信息。与预先存在的同位素成分相结合，这些知识将解锁我们圆盘的基本动态特性，使我能够解决当前行星构建模型中存在的空白。因此，MMESSH 将最终形成这一过程的下一代模型，该模型植根于我们对其基本阶段的理解的一步改变，我将利用该模型以前所未有的深度和清晰度来探索太阳系中行星所表现出的各种行为的起源。系统及其他系统，以及导致地球孕育复杂生命的早期过程。