ESWW_Poster_Gallagher_Final.pdf (24.02 MB)
Multiple Regions of Shock Accelerated Particles in the Solar Corona
poster
posted on 2018-11-02, 15:01 authored by Peter GallagherPeter Gallagher, Diana MorosanDiana Morosan, Eoin CarleyEoin Carley, Laura HayesLaura Hayes, Sophie MurraySophie Murray, Pietro ZuccaPietro Zucca, Richard Fallows, Joe McCauley, Emilia Kilpua, Gottfried Mann, Christian VocksPoster at European Space Weather Week, November 2018.
The Sun is an active star that can launch large eruptions of magnetised plasma into the heliosphere, called coronal mass ejections. These ejections can drive shocks that accelerate particles to high energies, often resulting in radio emission at low frequencies (<200 MHz). To date, the relationship between the expansion of coronal mass ejections, shocks and particle acceleration is not well understood, partially due to difficulties associated with radio imaging at low frequencies. Here, we report unique radio, whitelight and ultraviolet imaging of the second largest flare in the current solar cycle and associated very fast coronal mass ejection (~3000km/s). For the first time, we identify the location of a multitude of radio shock signatures, called herringbones, and find evidence for shock accelerated electron beams at multiple locations along an expanding coronal mass ejection, supporting theories of non-uniform, rippled shock fronts.