Layered accretion, vortex excitation, and planet formation in circumstellar disks

星周盘中的层状吸积、涡旋激发和行星形成

• 批准号: 1009802
• 负责人: Mordecai-Mark Mac Low
• 金额: $ 46.09万
• 依托单位: American Museum Natural History
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-15 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1009802&HistoricalAwards=false
• 关键词: Layered; accretion; vortex; excitation; planet

This award will support a theoretical effort to explore the effects of turbulence in accretion disks around very young stars. The modern understanding of disk theory requires the presence of turbulence in order to provide the viscosity necessary for angular momentum transport. Turbulence can also assist the trapping of solids needed to quickly aggregate dust into progressively larger bodies, leading to planet formation. The theoretical models to be used are based on three-dimensional magnetohydrodynamical calculations, and include the effects of resistivity and gas cooling.The research is expected to improve the understanding of accretion onto stars and the environment in which planet formation occurs. The research team plans to create computer visualizations based on the simulations used for this project, and to distribute these to the astronomical community. They will also participate in ongoing outreach and public education efforts at the American Museum of Natural History.

该奖项将支持理论上的努力，以探索在非常年轻的明星周围积聚磁盘中湍流的影响。 对磁盘理论的现代理解需要存在湍流，以便提供角动量运输所需的粘度。 湍流还可以帮助捕获固体，以快速将灰尘汇总到逐渐较大的身体中，从而导致行星形成。 要使用的理论模型基于三维磁流体动力学计算，包括电阻率和气体冷却的影响。该研究有望提高对恒星和行星形成的环境的理解。 研究团队计划根据该项目使用的模拟来创建计算机可视化，并将其分配给天文学界。 他们还将在美国自然历史博物馆参加正在进行的外展和公共教育工作。