Saturated Compton Cooling Model of Cosmological Gamma-Ray Bursts

摘要

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 ≥10~2, radius 10~15 cm, thickness ≤10~1110~12 cm, comoving lepton density ≥10~13 cm~-3 and is dominated by a thermal population of keV comoving temperature, with less than a few percent nonthermal population.