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The acceleration of energetic particles by a slow coronal mass ejection  

Nicolas Wijsen - KU Leuven, Belgium; Angels Aran - University of Barcelona, Spain; Jens Pomoell - University of Helsinki, Finland; David Lario - NASA, United States; Alexandr Afanasiev - University of Turku, Finland; Rami Vainio - University of Turku, Finland; Stefaan Poedts - KU Leuven, Belgium 

Session: QV - Interplanetary CMEs and Solar Particle Events


Abstract

Recent observations of Parker Solar Probe (PSP) have indicated that slow coronal mass ejections (CMEs) can be accompanied by anisotropic, energetic ion enhancements. These ions possibly result from continuous interplanetary acceleration processes, occurring at the compression or shock wave propagating in front of a CME.  The seed population feeding into this acceleration process may consist of the supra-thermal tail of the solar wind plasma.

In this work, we use the model PARADISE (PArticle Radiation Asset Directed at Interplanetary Space Exploration) to study the evolution of a supra-thermal ion population, which propagates in a uniform solar wind containing a slow CME. To model the solar wind and the CME, we use the three-dimensional inner-heliospheric model EUHFORIA (EUropean Heliospheric FORrecasting Information Asset), which solves the ideal magnetohydrodynamic equations. We investigate how different particle scattering conditions at the CME front affects the obtained particle intensity profiles measured by virtual observers located at various positions in the heliosphere.



Approaching deadlines:

Registration opens:

16 July 2020

Abstract submission opens:

16 July 2020

European Space Weather Medals:

6 September 2020

Registration deadline:

25 September 2020

Registration deadline: [extended]

10 October 2020

Abstract submission deadline:

4 September 2020