Title: Gamma-ray bursts from magnetized neutron-loaded jets
Abstract:
Jets producing gamma-ray bursts likely carry a significant neutron
component, which leads to strong collisional heating of the jet. We
investigate radiation produced by this heating using a new numerical code.
Our results confirm the recent claim that collisional heating generates the
observed Band-type spectrum of GRBs, peaking close to MeV. We have extended
the model to study the effects of the magnetic field on the emitted
radiation, which tends to soften the low-energy part of the spectrum and
shift the peak to somewhat lower energies. The high-energy part of the
spectrum extends well above GeV and can contribute to the prompt emission
observed by Fermi/LAT.