Other
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spd....42.1103p&link_type=abstract
American Astronomical Society, SPD meeting #42, #11.03; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
Fermi-LAT has detected >100 MeV emission beginning 2011 March 7 and extending over several hours following (and somewhat overlapping with the decay phase of) the M3.7 flare at 19:50 UT, which was observed up to at least 300 keV by RHESSI and the Fermi GBM during the 7 minute impulsive phase. There was no evidence of detection of nuclear-line emission by RHESSI during this flare and during the time interval from March 7 20 hr UT to March 8 4 hr UT of the Fermi-LAT observations. The Fermi-LAT emission coincides with several other smaller flares seen both in RHESSI and GOES light curves, with SEP electrons and protons and a prominent CME. There is also some indication of microwave emission from Noboyama observatory.
The long duration and relatively hard spectrum of the Fermi-LAT gamma-rays pose a challenge to theoretical modeling. We shall discuss the hard X-ray and gamma-ray characteristics of these events and evaluate several scenarios for acceleration of particles and production of these radiation, including leptonic and hadronic origin from either the flare site or the CME shock region.
Allafort Alice
Chen Qijin
Fermi Collaboration
Gigliotto N.
Longo Francesco
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