High Efficiency of Gamma-Ray Bursts Revisited

Details High Efficiency of Gamma-Ray Bursts Revisited High Efficiency of Gamma-Ray Bursts Revisited

2007-03-07

arxiv.org/abs/astro-ph/0703136v1

Adv.SpaceRes.40:1240-1243,2007

Astronomy and Astrophysics

Astrophysics

12 pages, 6 figures, accepted by JASR

Scientific paper

10.1016/j.asr.2007.01.075

Using the conservation of energy and momentum during collisions of any two shells, we consider the efficiency of gamma-ray bursts by assuming that the ejecta from the central engine are equally massive and have the same Lorentz factors. We calculate the efficiency and the final Lorentz factor of the merged whole shell for different initial diversities of Lorentz factors and for different microscopic radiative efficiency. As a result, a common high efficiency in the range of 0.1 to 0.9 is considerable, and a very high value near 100% is also reachable if the diversity of the Lorentz factors is large enough.

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