Coronal Mass Ejection (CME) Associated Energetic Particles: An In-Depth Comparison of Theory with Observations

日冕物质抛射 (CME) 相关高能粒子：理论与观测的深入比较

• 批准号: 0203252
• 负责人: Joseph Dwyer
• 金额: $ 22.32万
• 依托单位: Florida Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0203252&HistoricalAwards=false
• 关键词: Coronal; Mass; Ejection; CME; Associated

Solar energetic particle (SEP) events associated with coronal mass ejections (CMEs) will be studied by developing a detailed convection-diffusion model of particle transport and acceleration in the solar corona and in interplanetary space. The model results will be compared with energetic particle population observations obtained at 1 AU, using the ACE and Wind data, and at several AU, using the Ulysses data. The focus of the effort will be on the low-energy (20 keV/nuc to 5 MeV/nuc) particles which remain poorly understood since they interact more readily with entrained solar wind structures. Low-energy particles are more strongly affected by the convection, wave-particle interactions, and adiabatic deceleration. Accordingly, these transport effects, as well as those associated with continuous acceleration, will be incorporated into the modeling effort. Because energetic particles precede the arrival of the CME by at least one day, characterizing these SEPs can potentially aid in the formulation of space weather forecasts.

太阳高能粒子(SEP)事件与日冕物质抛射(CME)有关，将通过建立一个详细的对流扩散模型来研究日冕和行星际空间中的粒子输运和加速。模型的结果将与在1AU使用ACE和Wind数据以及在几个AU使用Ulysses数据获得的高能粒子群观测进行比较。这项工作的重点将放在低能粒子(20keV/nuc到5 MeV/nuc)上，这些粒子仍然知之甚少，因为它们更容易与携带的太阳风结构相互作用。低能粒子受对流、波粒相互作用和绝热减速的影响更大。因此，这些传输效果以及与持续加速相关的效果将被合并到建模工作中。由于高能粒子比CME的到来至少早了一天，因此表征这些SEP可能有助于制定空间天气预报。