Abstract
Low energy particles coming from the solar direction are often detected for many hours, or even days, after a solar flare, when the prompt component of solar cosmic rays has decayed below detection thresholds. On occasions low energy fluxes have also been detected even isolated from definite solar flares. Particle fluxes in these delayed events and non-associated flare events present different characteristics in their profile, energy spectrum and degree of anisotropy. In order to study these events we find the location of the source of the fluxes by the analysis of their energy spectra. We analyze 28 events and determine whether particles have been produced at the Sun level, in interplanetary space, or by superposition of both sources. Arguments in terms of typical properties of coronal propagation are given to support the solar origin of some events. We discuss a scenario for the production at the Sun level of the delayed fluxes (corrotating events). We deduce plausible parameters for the sources and for the acceleration process.
