Solar Energetic Particle Events Associated with Prominence Eruptions: A Case Study
Abstract
We investigated the characteristics the 2015 June 18 large solar energetic particle (SEP) event (GOES >10 MeV particle flux was >10 particles/(cm^2 s sr)) associated with a prominence eruption from the Sun. Recent work (Gopalswamy et al. 2015 ApJ 806, 8) reported on a set of large SEP events associated with filament eruption (FE) events occurring outside of active regions. The FE-associated SEPs are produced by coronal mass ejections (CMEs) that are accelerating and forming a shock at large distances from the Sun. Such SEPs exhibit a soft energy spectrum with the spectral index >4 in the 10-100 MeV range. The 2015 June 18 eruption was associated with an M1.3 flare and a prominence eruption from the west limb observed by SDO. The associated CME was fast (speed 1714 km/s), and it was accelerating in the LASCO field of view (acceleration 27.7 m/s^2). The CME did not produce a metric type II radio burst but it was associated with an interplanetary (IP) type II radio burst, implying that a strong shock formed in the interplanetary medium. We present our initial findings of this case study of prominence-associated SEPs.
- Publication:
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Solar Heliospheric and INterplanetary Environment (SHINE 2018)
- Pub Date:
- July 2018
- Bibcode:
- 2018shin.confE.229T