It is by now recognized that GRBs accelerate protons to relativistic energies and that dense media are often present nearby the sources. Within this framework, we compute the high-energy gamma-ray flux from the decay of neutral pions produced through the interaction of accelerated protons with nucleons in the surrounding medium. The presence of magnetic fields around the GRBs soufrces causes the deflection of the accelearted protons and so a temporal spread of the produced gamma-rays with respect to the signal in the soft gamma-ray band. We also analyze the possibility to detect the gamma-ray signal in the GeV-TeV energy range by the ARGO detector under construction in Tibet.
Gamma-ray bursts: a model for high-energy emission
DE PAOLIS, Francesco;INGROSSO, Gabriele;ORLANDO, Daniela
2000-01-01
Abstract
It is by now recognized that GRBs accelerate protons to relativistic energies and that dense media are often present nearby the sources. Within this framework, we compute the high-energy gamma-ray flux from the decay of neutral pions produced through the interaction of accelerated protons with nucleons in the surrounding medium. The presence of magnetic fields around the GRBs soufrces causes the deflection of the accelearted protons and so a temporal spread of the produced gamma-rays with respect to the signal in the soft gamma-ray band. We also analyze the possibility to detect the gamma-ray signal in the GeV-TeV energy range by the ARGO detector under construction in Tibet.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
