Observations and numerical simulations of gradual SEP events with Ulysses and ACE

Discussion timeslot (ZOOM-Meeting): 12. July 2021 - 18:00
ZOOM-Meeting URL: https://desy.zoom.us/j/96969970711
ZOOM-Meeting ID: 96969970711
ZOOM-Meeting Passcode: ICRC2021
Corresponding Session: https://icrc2021-venue.desy.de/channel/19-SEP-Acceleration-and-Propagation-SH/46
Live-Stream URL: https://icrc2021-venue.desy.de/livestream/Discussion-07/8

Abstract:
'We study the latitudinal extent of the gradual solar energetic particle (SEP) events of 2000 June 10 and 2001 December 26 using energetic electron observations from the *ACE* and *Ulysses*. We investigate the effects of particle source and transport on the profiles. We get the best fit parameters for simulations by comparing simulations with the two spacecraft observations. We show that perpendicular diffusion and adiabatic cooling can significantly affect the propagation of particles. In addition, it is found that the start and peak times of particle injections are between the onset and peak times of flare for the two events. Furthermore, we have theoretical models for the peak intensity of the particle source and the time interval from the onset of flares to the peak time of the particle source. We show that the theories agree well with the best fit parameters.'

Authors: L.-L. Lian | Gang Qin | Yang Wang | S.-W. Cui
Indico-ID: 945
Proceeding URL: https://pos.sissa.it/395/1351