Observations of energetic particles at interplanetary shocks with Solar Orbiter
- 1Imperial College London, Physics, London, United Kingdom of Great Britain – England, Scotland, Wales (d.trotta@imperial.ac.uk)
- 2School of Physics and Astronomy, Queen Mary university of London, London E31NS, UK
- 3Department of Physics and Astronomy, University of Turku, Turku, Finland
- 4Department of Physics, University of Helsinki, Helsinki, Finland
- 5Swedish Institute of Space Physics, Uppsala, Sweden
- 6Departamento de Ciencias Espaciales, Instituto de Geofısica, Universidad Nacional Autonoma de Mexico, 7 Ciudad Universitaria, Ciudad de Mexico, Mexico
- 7Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
- 8Goddard Planetary Heliophysics Institute, University of Maryland, Baltimore County, Baltimore, MD 21250, USA
- 9Institute of Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
Interplanetary (IP) shocks are important sites of particle acceleration in the Heliosphere and can be observed in-situ utilizing spacecraft measurements. Such observations are crucial to address important aspects of energy conversion for a variety of astrophysical systems.
Under this point of view, Solar Orbiter provides observations of interplanetary shocks at different locations in the inner heliosphere with unprecedented time and energy resolution in the suprathermal (usually above 50 keV) energy range. We present a comprehensive identification of such shocks, highlighting their typical parameters.
We then study a strong shock showing novel dispersive signals in the suprathermal particle fluxes observed by the Solar Orbiter SupraThermal Electron and Proton sensor. These are probably due to irregular injection of particles to suprathermal energies along the shock front, as inferred using the Solar Orbiter in-situ observations and self-consistent, kinetic modelling of the shock transition.
How to cite: Trotta, D., Horbury, T., Hietala, H., Dresing, N., Vainio, R., Kilpua, E., Dimmock, A., Blanco-Cano, X., Lario, D., Koval, A., Wimmer-Schweingruber, R., Berger, L., and Yang, L.: Observations of energetic particles at interplanetary shocks with Solar Orbiter, EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-8760, https://doi.org/10.5194/egusphere-egu23-8760, 2023.
