Directed Relativistic Blast Wave

Details Directed Relativistic Blast Wave Directed Relativistic Blast Wave

2007-04-23

arxiv.org/abs/0704.3081v1

Astronomy and Astrophysics

Astrophysics

9 pages

Scientific paper

A spherically symmetrical ultra-relativistic blast wave is not an attractor of a generic asymmetric explosion. Spherical symmetry is reached only by the time the blast wave slows down to non-relativistic velocities, when the Sedov-Taylor-von Neumann attractor solution sets in. We show however, that a directed relativistic explosion, with the explosion momentum close to the explosion energy, produces a blast wave with a universal intermediate asymptotic -- a selfsimilar directed ultra-relativistic blast wave. This universality might be of interest for the astrophysics of gamma-ray burst afterglows.

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