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Title: The Composition of GRB Jets and the ICMART Model

Models of gamma ray bursts (GRBs) are drawn from observations of light curves, spectra, and spectral evolution. The ICMART (Internal Collision-induced MAgnetic Reconnection & Turbulence) model and some of its features are presented. Increasing evidence points towards Poynting-flux-dominated jets in at least some (even a good fraction of) GRBs. The main emission component (Band) is of a synchrotron emission origin, produced by electrons accelerated in the emission region. The data seem to require that magnetic reconnection in the moderately-high sigma regime is the mechanism to accelerate particles. Extensive numerical simulations are needed to verify physical details of such a model, and some encouraging results have been obtained.
 [1] ;  [2]
  1. University of Nevada, Las Vegas
  2. Los Alamos National Laboratory
Publication Date:
OSTI Identifier:
Report Number(s):
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Resource Relation:
Conference: Plasma Energization: Exchanges between Fluid and Kinetic Scales ; 2015-05-04 - 2015-05-06 ; Los Alamos, New Mexico, United States
Research Org:
Los Alamos National Laboratory (LANL)
Sponsoring Org:
University of Nevada, Las Vegas
Country of Publication:
United States
79 ASTRONOMY AND ASTROPHYSICS Astronomy and Astrophysics