Saturated Compton Cooling Model of Cosmological Gamma-Ray Bursts

Astronomy and Astrophysics – Astronomy

Scientific paper

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Gamma Rays: Bursts

Scientific paper

We revisit the saturated Compton cooling model of gamma-ray burst pulse decay in the context of cosmological scenarios. We find that for pulse duration of ~1 s, this model is consistent with Gpc distance if the Compton cooling plasma is a relativistically expanding thin shell of bulk Lorentz factor >=102, radius ~1015 cm, thickness <=1011-1012 cm, comoving lepton density >=1013 cm-3 and is dominated by a thermal population of keV comoving temperature, with less than a few percent nonthermal population.

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