Dynamical Evolution of Gamma-Ray Burst Remnants with Evolving Radiative Efficiency

Details Dynamical Evolution of Gamma-Ray Burst Remnants with Evolving Radiative Efficiency Dynamical Evolution of Gamma-Ray Burst Remnants with Evolving Radiative Efficiency

2002-10-30

arxiv.org/abs/astro-ph/0210656v1

Chin.J.Astron.Astrophys. 2 (2002) 525-532

Astronomy and Astrophysics

Astrophysics

10 pages, 5 embedded eps figures, to appear in: Chin. J. Astron. Astrophys. (2002), Vol 2

Scientific paper

In previous works, a generic dynamical model has been suggested by Huang et al., which is shown to be correct for both adiabatic and radiative blastwaves, and in both ultra-relativistic and non-relativistic phases. In deriving their equations, Huang et al. have assumed that the radiative efficiency of the fireball is constant. They then applied their model directly to realistic cases where the radiative efficiency evolves with time. In this paper, we abandon the above assumption and re-derive a more accurate dynamical equation for gamma-ray burst remnants. Numerical results show that Huang et al.'s model is accurate enough in general cases.

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