Toward Planetesimal Formation in Protoplanetary Disks

原行星盘中的小行星形成

• 批准号: 1313021
• 负责人: Philip Armitage
• 金额: $ 49.77万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1313021&HistoricalAwards=false
• 关键词: Toward; Planetesimal; Formation; Protoplanetary; Disks

This is a theoretical project to develop simulations of protoplanetary disks that model the development and saturation of magnetohydrodynamic turbulence and the response of small solid particles to that turbulence. They will focus on planetesimals 1-100 km in size, and more accurately model Ohmic diffusion and ambipolar diffusion in disks. One of the goals is to determine whether planet formation can occur equally through a disk, or whether there are locations or disk properties (such as metallicity) that strongly favor or inhibit planetesimal formation. Planetesimals are the first bodies in primordial circumstellar disks that are large enough that their dynamics is dominated by gravity at the very early stages of planet formation, and they eventually lead to the formation of planets. Broader impacts include training a postdoctoral researcher, incorporating this work into class lecture notes which are shared with the astronomy community, and providing planetarium programs to the public. This work has implications for models of how planets formed in our solar system, and for extrasolar planetary systems.

这是一个理论项目，旨在模拟原行星盘，模拟磁流体动力学湍流的发展和饱和以及小固体颗粒对该湍流的反应。 他们将专注于1-100公里大小的星子，并更准确地模拟盘中的欧姆扩散和双极扩散。 其中一个目标是确定行星的形成是否可以通过一个磁盘平等地发生，或者是否有位置或磁盘属性（如金属丰度），强烈有利于或抑制星子的形成。 星子是原始星周盘中的第一个天体，它们足够大，以至于在行星形成的早期阶段，它们的动力学受引力支配，最终导致行星的形成。 更广泛的影响包括培训博士后研究人员，将这项工作纳入课堂讲稿，与天文学界分享，并向公众提供天文馆计划。 这项工作对我们太阳系中行星如何形成的模型以及太阳系外行星系统都有影响。