eng URI http://hdl.handle.net/10795/3018 φυσικές και εφαρμοσμένες επιστήμες πυρηνική φυσική στοιχειώδη σωματίδια ραδιενέργεια αστρονομία In the present work we focus on the interplay between stochastic acceleration of charged particles and radiation processes in a region of turbulent magnetized plasma, setting the framework for an ‘one-zone’ radiation-acceleration model for Gamma-Ray Burst (GRB) afterglows. Specifically, we assume that the particle distribution is isotropic in space and treat in detail the particle propagation in the momentum-space. The electron distibution is modified by the acceleration, synchrotron and Synchrotron Self-Compton (SSC) radiation and escape processes. The magnetic field as well as the particle injection rate are functions of time as measured in the comoving frame of the blast wave. In order to study the dynamical evolution of this system, we numerically solve the time-dependent Fokker-Planck equation for the electron distribution and present the obtained particle and photon spectra of an indicative example. 4 pp. LOMv1.0 creator LOMv1.0 publisher LOMv1.0 Scientific Coordinator LOMv1.0 Project Executing Organisation 2012-05 Digital Library of the Operational Programme "Education and Lifelong Learning" abstract types Text Afterglow emission Charged particles acceleration ‘one-zone’ radiation-acceleration model Gamma-Ray Burst 194460 application/pdf http://repository.edulll.gr/edulll/bitstream/10795/3018/2/3018_1.41_%ce%94%ce%97%ce%9c_11_7_12.pdf URI http://hdl.handle.net/10795/3018 LOMv1.0creator 2016-05-05T10:26:27Z LOMv1.0validator 2016-05-05T10:26:27Z LOMv1.0 gre no no Copyright EYD-EPEDBM (Operational Programme "Education and Lifelong Learning")