We compare and contrast the three different approaches to the optically thick adiabatic
phase of Gamma-ray Burst(GRB) all the way to transparency. Special attention is given to
the role of the rate equation in self-consistently solving the rate equati...
We compare and contrast the three different approaches to the optically thick adiabatic
phase of Gamma-ray Burst(GRB) all the way to transparency. Special attention is given to
the role of the rate equation in self-consistently solving the rate equation with the relativistic
hydrodynamic equations. The works of Shemi and Piran [1], Piran, Shemi and Narayan [2],
M´esz´aros, Laguna and Rees [3] and Ruffini, Salmonson, Wilson and Xue [4,5] are compared and
contrasted. The roles of the baryonic loading in these three treatments are pointed out. The constraints
on initial conditions for the fireball produced by an electro-magnetic black hole are obtained.