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The authors study the evolution of a supernova remnant (SNR) evolving in a homogeneous, uniform medium. They have concentrated on the transition from the adiabatic stage to the radiative pressure-driven snowplow stage, and the possible further establishment of a momentum-conserving snowplow stage. In the numerically simulated example (ejecta mass of 3 Mₛun;, ambient hydrogen density of 0. 1 cm-3), the radiative stage begins after less than one sound crossing time from the end of the free-expansion stage, and as a result the interior of the blast wave never completely settles to the Sedov-Taylor similarity solution. The authors also provide a simple physical model for the overall dynamics and present analytic approximations, good to a few percent in radius and velocity when compared with the numerical simulations.
Cioffi et al. (Tue,) studied this question.