EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Preferential Acceleration of Suprathermal Particles at Shocks

Stefano Livi1, Chris Owen2, Philippe Louarn3, Andrei Fedorov3, Ben Alterman1, Susan Lepri4, Jim Raines4, Antoniette Galvin5, Lynn Kistler5, Frederic Allegrini1, Keiichi Ogasawara1, Peter Wurz6, Roberto Bruno7, Raffaella D'Amicis7, and Michael Collier8
Stefano Livi et al.
  • 1Southwest Research Institute
  • 2University College London
  • 3Institut de Recherche en Astrophysique et Planétologie
  • 4University of Michigan
  • 5University of New Hampshire
  • 6University of Bern
  • 7Istituto di Astrofisica e Planetologia Spaziali
  • 8Goddard Space Flight Center

On October/November 2021 the Heavy Ion Sensor onboard Solar Orbiter observed data connected to three interplanetary shock events: Oct 30, Nov 3 and Nov 27. During all three events, the flux of suprathermal particles, defined as those having an energy larger than twice the energy of the solar wind component, showed remarkable intensification. We discuss those changes and specifically how particles of different mass/charge and energy/charge distribution before the shock are affected differently by the interaction with the shock front itself. From these three expampes, it appears that intensifications are stronger for species already having a seed population in the suprathermal regime.

How to cite: Livi, S., Owen, C., Louarn, P., Fedorov, A., Alterman, B., Lepri, S., Raines, J., Galvin, A., Kistler, L., Allegrini, F., Ogasawara, K., Wurz, P., Bruno, R., D'Amicis, R., and Collier, M.: Preferential Acceleration of Suprathermal Particles at Shocks, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-5984,, 2022.