Predicting the Heliosphere

预测日光层

• 批准号: 1043012
• 负责人: Lennard Fisk
• 金额: $ 29.68万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 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: 2010-12-15 至 2014-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1043012&HistoricalAwards=false
• 关键词: Predicting; Heliosphere

In this project, the Principal Investigator (PI) will investigate the suprathermal particle distributions for solar wind ions. The PI plans to use existing models developed under prior NSF support to predict the production of energetic neutral atoms in the solar wind and to compare this output with recent observations from the IBEX and Cassini spacecraft. He also plans to study whether his presumed 'compressive turbulence' mechanism for stochastic acceleration of suprathermal solar wind ions might also be able to accelerate galactic cosmic rays in the interstellar medium, or to create seed populations of energetic particles in the solar corona. As a means to promote the development of a predictive model for the solar wind, the proposer intends to investigate the dynamics of the region surrounding the heliospheric current sheet, to study the relationship between the mass flux of the solar wind and the strength of the Sun's open magnetic field, and to attempt a reconciliation of various theories for embedding open magnetic flux in primarily closed-field magnetic regions. The PI expects this research to be relevant to general astrophysical plasmas as well as to solar physics. He plans to incorporate the new concepts developed in this project into the graduate education program at the University of Michigan, in order to encourage and train the next generation of scientists in solar and heliospheric physics.

在这个项目中，主要研究者（PI）将研究太阳风离子的超热粒子分布。 PI计划使用在先前NSF支持下开发的现有模型来预测太阳风中高能中性原子的产生，并将此输出与IBEX和卡西尼号航天器的最新观测结果进行比较。他还计划研究他推测的超热太阳风离子随机加速的“压缩湍流”机制是否也能够加速星际介质中的银河宇宙射线，或者在日冕中创造高能粒子的种子种群。作为促进开发太阳风预测模型的一种手段，提议者打算调查日光层电流片周围区域的动态，研究太阳风质量通量与太阳开放磁场强度之间的关系，并试图调和将开放磁通量嵌入主要是封闭磁场区域的各种理论。 PI希望这项研究与一般的天体物理等离子体以及太阳物理学有关。他计划将该项目中开发的新概念纳入密歇根大学的研究生教育计划，以鼓励和培训太阳和日光层物理学的下一代科学家。