Abstract
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 language | English (US) |
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Article number | L40 |
Journal | Astrophysical Journal Letters |
Volume | 733 |
Issue number | 2 PART 2 |
DOIs | |
State | Published - Jun 1 2011 |
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science