GeV emission from collisional magnetized gamma-ray bursts

P. Mészáros, M. J. Rees

Research output: Contribution to journalArticlepeer-review

57 Scopus citations


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.

Original languageEnglish (US)
Article numberL40
JournalAstrophysical Journal Letters
Issue number2 PART 2
StatePublished - Jun 1 2011

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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