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e±-rich GRB Fireball and Infrared Flashes

Published online by Cambridge University Press:  26 May 2016

Zhuo Li ,
Z. G. Dai  and
T. Lu
Zhuo Li
Affiliation:
Department of Astronomy, Nanjing University, Nanjing 210093, P. R. China
Z. G. Dai
Affiliation:
Department of Astronomy, Nanjing University, Nanjing 210093, P. R. China
T. Lu
Affiliation:
Department of Astronomy, Nanjing University, Nanjing 210093, P. R. China

Abstract

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Gamma-ray bursts (GRBs) are believed to originate from ultra-relativistic fireballs, with initial Lorentz factor η ∼ 102 − 103. However very high energy photons may still suffer from γγ interaction. We show here that in a wide range of model parameters, the resulting pairs may dominate electrons associated with the fireball baryons. This may provide an explanation for the rarity of prompt optical detections. A rapid response to the GRB trigger at the IR band would detect such a strong flash.

Type
Part 9 Gamma Ray Bursters
Information
Symposium - International Astronomical Union , Volume 214: High Energy Processes and Phenomena in Astrophysics , 2003 , pp. 331 - 332
Copyright
Copyright © Astronomical Society of the Pacific 2003 

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