Davide Lazzati et al 2000 ApJ 529 L17 doi:10.1086/312452
Compton-dragged Gamma-Ray Bursts Associated with Supernovae
FREEDavide Lazzati1,4, Gabriele Ghisellini1, Annalisa Celotti2 and Martin J. Rees3
Show affiliationsIt is proposed that the gamma-ray photons that characterize the prompt emission of gamma-ray bursts are produced through the Compton-drag process, which is caused by the interaction of a relativistic fireball with a very dense soft photon bath. If gamma-ray bursts are indeed associated with supernovae, then the exploding star can provide enough soft photons for radiative drag to be effective. This model accounts for the basic properties of gamma-ray bursts, i.e., the overall energetics, the peak frequency of the spectrum, and the fast variability, with an efficiency that can exceed 50%. In this scenario, there is no need for particle acceleration in relativistic collisionless shocks. Furthermore, although the Poynting flux may be important in accelerating the outflow, no magnetic field is required in the gamma-ray production. The drag also naturally limits the relativistic expansion of the fireball to Γ 
104.
- Subject headings
gamma rays: bursts; radiation mechanisms: non-thermal; supernovae: general
- Dates
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Issue 1 (2000 January 20)
Received 1999 October 12, accepted for publication 1999 November 18
Published 1999 December 22
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Compton-dragged Gamma-Ray Bursts Associated with Supernovae
Davide Lazzati et al 2000 ApJ 529 L17
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