May 25 – 27, 2011
Rettorato, University Roma TRE, Roma, Italy
Europe/Rome timezone
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Fermi LAT observation of quiet gamma-ray emission from the Sun

May 26, 2011, 5:45 PM
Rettorato, University Roma TRE, Roma, Italy

Rettorato, University Roma TRE, Roma, Italy

Viale Ostiense 159 00148, Roma Italy Room: Aula Magna


Dr Monica Brigida (Bari University)


We show the latest results of Fermi-LAT observations of the quiescent Sun during the first 18 months of the mission. During this period the solar activity was at its minimum, hence the solar emission induced by cosmic rays was at its maximum. Two emission components are clearly distinguished: the point-like emission from the solar disk due to the cosmic-ray cascades in the solar atmosphere, and the extended emission due to inverse Compton scattering of cosmic ray electrons on solar photons in the heliosphere. We present the entire analysis, showing spectra and angular profiles of both components and discuss the comparison with models and future plans.

Primary author

Dr Monica Brigida (Bari University)


Dr Elena Orlando (SLAC - Stanford) Dr Igor Moskalenko (SLAC - Stanford) Dr Nicola Giglietto (Dip. di Fisica "M.Merlin" e Politecnico di Bari)

Presentation materials