'External shock' presentation slideshows

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763 views • 75 slides

Gamma Ray Bursts: a new tool for astrophysics and cosmology?

Gamma Ray Bursts: a new tool for astrophysics and cosmology?. Guido Barbiellini Universit y and INFN Trieste. BeppoSAX Afterglow detection. HST host galaxies images. Outline. Introduction GRB and cosmology The Fireball model The Afterglow External density Iron lines

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Long term X-ray and GeV flares in GRB light curves

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GAMMA-RAY BLAZARS NEAR EQUIPARTITION AND THE ORIGIN OF THE GEV SPECTRAL BREAK

Colliding Shell and External Shock Origin of the Prompt and Early Afterglow Emissions of Fermi GRBs Chuck Dermer Naval Research Laboratory, Washington, DC charles.dermer@nrl.navy.mil. Following ideas presented in papers with. Matteo Cerruti,* Catherine Boisson, Andreas Zech

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Alessandra Galli 1,2,3

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Introduction

?The shallow decay phase and the flares in the afterglows of gamma-ray bursts (GRBs) is widely believed to be associated with the later activation of central engine. ?Some GRBs (GRB 081029, GRB 100621A) have shown steep giant bumps in their optical afterglow.

126 views • 1 slides