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On the afterglow of Gamma-Ray Bursts within the EMBH model

Abstract : The main results of this work are the contribution to find the following results:
• The most general GRB is made by an early emission (P-GRB or Proper-GRB), with a time-scale not larger than 1 or 2 seconds and an afterglow, whose light curve is characterized by an increasing phase followed by a peak and a decreasing phase. This peak has been identified with the long GRBs prompt emission. In this scenario short GRBs are not but P-GRB, while long GRBs present both a peak and a decreasing late time emission, which is the observed afterglow.
• A possible GRB/SuperNova connection is based on the process of induced gravitational collapse of a companion star of the black hole originating the GRB.
• A thermal distribution in the comoving frame of the expanding system is assumed for X and γ bands of the spectrum. This assumption leads to a natural bending of the late time light curves making not necessary the hypothesis of a beamed emission within a collimated jet from the inner engine, which has been introduced in literature essentially to reduce the energy requirements.
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Contributor : Federico Fraschetti <>
Submitted on : Saturday, February 7, 2009 - 6:06:11 PM
Last modification on : Wednesday, October 14, 2020 - 4:12:51 AM
Long-term archiving on: : Tuesday, June 8, 2010 - 8:24:28 PM


  • HAL Id : tel-00359474, version 1



Federico Fraschetti. On the afterglow of Gamma-Ray Bursts within the EMBH model. Astrophysics [astro-ph]. Università degli studi di Trento, 2004. English. ⟨tel-00359474⟩



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