Shedding new light on the Sun with the Fermi LAT

N. Omodei, V. Petrosian, W. Liu, F. Rubio da Costa, Q. Chen, M. Pesce-Rollins, E. Grove, F. Longo for the Fermi-LAT Collaboration

Published 2015-02-13Version 1

During its first six years of operation, the Fermi Large Area Telescope (LAT) has detected >30 MeV gamma-ray emission from more than 40 solar flares, nearly a factor of 10 more than those detected by EGRET. These include detections of impulsive and sustained emissions, extending up to 20 hours in the case of the 2012 March 7 X-class flares. We will present an overview of solar flare detections with LAT, highlighting recent results and surprising features, including the detection of >100 MeV emission associated with flares located behind the limb. Such flares may shed new light on the relationship between the sites of particle acceleration and gamma-ray emission.