Jul 12 – 23, 2021
Europe/Berlin timezone

Observations and numerical simulations of impulsive SEP events with Ulysses and ACE observations

Jul 12, 2021, 6:00 PM
1h 30m


Talk SH | Solar & Heliospheric Discussion


L.-L. Lian


We study the latitudinal extent of the impulsive 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.


Solar energetic particles; acceleration of particles; turbulence; flare

Subcategory Theoretical Results

Primary authors

L.-L. Lian Gang Qin Prof. Yang Wang (School of Science, Harbin Institute of Technology, Shenzhen) Prof. S.-W. Cui (Hebei Normal University, Shijiazhuang)

Presentation materials