Multiwavelength Afterglows in Gamma‐Ray Bursts: Refreshed Shock and Jet Effects
A. PanaitescuDepartment of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802P. MészárosDepartment of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802M. J. ReesInstitute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, England, UK
1998en
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Annotatsiya
We present an analytical approach to calculate the hydrodynamics of the interaction between a relativistic ejecta and a surrounding medium, whose evolution serves as a model for Gamma-Ray Burst afterglows. We investigate the effect of the relevant model parameters on the X-ray, optical and radio fluxes, and the effect of a refreshed shock energy input and anisotropy in the ejecta on the shape of the light curves. We compare our numerical results to observed afterglows and give a quantitative description of the conditions (geometry and physical parameters) in the ejecta that are compatible with the light curves of the 970508 afterglow, for which a large number of accurate flux measurements are available.
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