2011/04/26 by P. Mészáros, M. J. Rees · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Dissipation #Fermi Gamma-ray Space Telescope #Gamma-ray bursts and supernovae #Jet (fluid) #Magnetic field #Neutrino #Neutrino Physics Research #astro-ph.HE #hep-ph
paper · pdf · doi:10.1088/2041-8205/733/2/l40
ApJ(Lett.), in press
arxiv created 2011/04/26 · openalex publication_date 2011/05/11 · arxiv updated 2015/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Magnetic fields may play a dominant role in gamma-ray bursts, and recent observations by Fermi indicate that GeV radiation, when detected, arrives delayed by seconds from the onset of the MeV component. Motivated by this, we discuss a magnetically dominated jet model where both magnetic dissipation and nuclear collisions are important. We show that, for parameters typical of the observed bursts, such a model involving a realistic jet structure can reproduce the general features of the MeV and a separate GeV radiation component, including the time delay between the two. The model also predicts a multi-GeV neutrino component.