Physics
Scientific paper
Feb 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sgrb.confe..41m&link_type=abstract
Presented at the KITP Conference: Supernova and Gamma-Ray Burst Remnants, Feb 10, 2006, Kavli Institute for Theoretical Physics,
Physics
Scientific paper
We present the spectral and temporal radiative signatures expected withinthe quot;Supercritical Pile\" model of Gamma Ray Bursts (GRB). This modelis motivated by the need for a process that provides the dissipationnecessary in GRB and presents a well defined scheme for converting theenergy stored in the relativistic protons of theRelativistic Blast Waves (RBW) associated with GRB into radiation; at thesame time it leads to spectra which exhibit a peak in the burst nuF_{nu} distribution at an energy E_p simeq 1 MeV in theobserverapos;s frame, in agreement with observation and largelyindependent of the Lorentz factor Gamma of the associated relativisticoutflow. Futhermore, this scheme does not require (but does notpreclude) acceleration of particles at the shock other than that providedby the isotropization of the flow bulk kinetic energy on the RBW frame. Inthe present paper we model in detail the evolution of protons, electronsand photons from a RBW within the framework of this model to producedetailed spectra of the prompt GRB phase as a function of time from acrossa very broad range spanning roughly 4 log_{10} Gamma decades$ in frequency. The model spectra are in generalagreement with observations and provide a means for the delineating of themodel parameters through direct comparison with trends observed in GRBproperties.
Kazanas
Mastichiadis
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