Compton dragged gamma-ray bursts: the spectrum

Abstract

We calculate the spectrum resulting from the interaction of a fireball with ambient soft photons. These photons are assumed to be produced by the walls of a funnel in a massive star. By parameterizing the radial dependence of the funnel temperature we calculate the deceleration of the fireball self-consistently, taking into account the absorption of high energy gamma-rays due to interaction with the softer ambient photons. The resulting spectrum is peaked at energies in agreement with observations, has a nu^2 slope in the X-ray band and a steep power-law high energy tail.

5 pages, 3 figures, accepted for publication in MNRAS, pink pages

References in corpus (6)

• Steep Slopes and Preferred Breaks in GRB Spectra: the Role of Photospheres and Comptonization
• Gamma-ray Burst Energetics
• Power Density Spectra of Gamma-Ray Bursts in the Internal Shock Model
• The Synchrotron Spectrum of Fast Cooling Electrons Revisited
• Constraints on the bulk Lorentz factor in the internal shock scenario for gamma-ray bursts
• Compton Dragged Gamma--Ray Bursts associated with Supernovae

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