Kavli Affiliate: Nicola Omodei
| First 5 Authors: Alexander Warmuth, Alexander Warmuth, , ,
| Summary:
We investigate the relationship between the gamma-ray emission measured with
Fermi-LAT and radio signatures of coronal shock waves in four behind-the-limb
(BTL) solar flares. All events were associated with metric type II radio burst.
Both start and end times of the radio bursts were synchronized with the
gamma-ray emission. The type II bursts associated with the BTL gamma-ray flares
had higher speeds and lower formation heights than those of an average sample.
These findings support the notion that the highly relativistic ions that
produce the gamma-rays in BTL flares are accelerated at CME-driven propagating
coronal shock waves rather than in large-scale coronal loops.
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