Data analysis in combination with numerical simulations of the acceleration and propagation of energetic particles in the vicinity of planetary magnetospheres

数据分析与行星磁层附近高能粒子加速和传播的数值模拟相结合

• 批准号: 137502432
• 负责人: Professor Dr. Bernd Heber
• 金额: --
• 依托单位: Institut für Experimentelle und Angewandte Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/137502432?language=en
• 关键词: Data; analysis; combination; numerical; simulations

Energetic charged particles accelerated into jets or upstream events at the magnetospheres of the Earth and Jupiter will be systematically studied through an interplay of observational and modelling points of view in order to arrive at conclusions that allow new and deeper insights into their generation and propagation. The first part will consist of a compilation and comparison of a larger selection of spacecraft data, the second one of self-consistent numerical simulations of the propagation process along a magnetic flux tube. The idea behind the combined investigations of energetic particle events at the Earth and Jupiter is to take advantage of the comprehensive data coverage around the Earth as well as of the unique features of the Jovian magnetosphere that allow to draw conclusions about the origin and the acceleration of the particles. At Jupiter, where particle events are of magnetospheric origin, the escape of the particles will be studied in detail by comparing data obtained within the magnetosphere with those measured close beyond the magnetopause, in particular in order to study the possible influence of the solar wind. Our results will provide the diffusion coefficients at two positions in the heliosphere and contribute to a better understanding of Jupiter as a source of energetic particles and their propagation.

将通过观测和建模观点的相互作用，系统地研究高能带电粒子在地球和木星的磁层中加速进入喷流或上游事件，以便得出结论，从而对它们的产生和传播有新的更深入的了解。第一部分将包括汇编和比较大量航天器数据，第二部分是对沿着磁通量管的传播过程进行自洽数值模拟。联合调查地球和木星高能粒子事件的想法是利用地球周围的全面数据覆盖范围以及木星磁层的独特特征，从而得出关于粒子起源和加速的结论。在粒子事件起源于磁层的木星，将通过比较磁层内获得的数据与磁层顶附近测得的数据，详细研究粒子的逃逸情况，特别是为了研究太阳风可能产生的影响。我们的结果将提供日光层两个位置的扩散系数，并有助于更好地了解木星作为高能粒子源及其传播。