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arXiv · 0804.2816

The "Fireshell" model in the Swift era

Carlo Luciano Bianco·Remo Ruffini
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Abstract

We here re-examine the validity of the constant-index power-law relation between the fireshell Lorentz gamma factor and its radial coordinate, usually adopted in the current Gamma-Ray Burst (GRB) literature on the grounds of an "ultrarelativistic" approximation. Such expressions are found to be mathematically correct but only approximately valid in a very limited range of the physical and astrophysical parameters and in an asymptotic regime which is reached only for a very short time, if any.

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Carlo Luciano Bianco, Remo Ruffini. 2008-04-17. The "Fireshell" model in the Swift era. https://doi.org/10.1142/9789812834300_0305

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