A Weak Fermi Gamma-ray Event Associated with a Halo CME and a Type II Radio Burst

Abstract

We report on the 2015 June 25 sustained gamma-ray emission (SGRE) event associated with a halo coronal mass ejection and a type II radio burst in the decameter-hectometric (DH) wavelengths. The duration and ending frequency of the type II burst are linearly related to the SGRE duration as found in previous works involving intense gamma-ray events. This study confirms that the SGRE event is due to protons accelerated in the shock that produced the DH type II burst.

arXiv comment4 pages, 6 figures, 1 table. URSI GASS 2020 Proceedings

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