Speaker
Description
First Name: Roger
Last Name: Prat Baucells
Affiliation: Universitat de Barcelona
All Authors: R. Prat, N. Wijsen, A. Aran, J. Markovic, R. Gómez-Herrero, D. Lario
Abstract: On the 26th of March 2025, the nominal magnetic footpoints of Solar Orbiter (at 0.32 au at the time) and Earth were separated by less than 20º in longitude, while having a latitudinal separation of 9º. On that same day, Solar Orbiter detected an electron event, showing intensity enhancements up to 1 MeV, which was also observed by near-Earth spacecraft as well as by STEREO A. This magnetic configuration provides an excellent opportunity to investigate the three-dimensional transport of both near-relativistic and relativistic electrons. A preliminary look at the data suggests that the peak intensities of electrons are similar at both Solar Orbiter and the Earth, despite Solar Orbiter being much closer to the Sun. In this study, we investigate the potential reasons that could lead to such behaviour of the peak intensity. Using the particle transport model PARADISE (Wijsen, 2020), we constrain the value of the parallel and perpendicular mean free paths of the energetic electrons. We also investigate if other transport effects (e.g., a non-nominal solar wind) may have played a role in shaping the event. We present the results found in our simulations, with special emphasis on the peak intensity’s dependence on latitude and radial distance.