The early interaction of a supernova with the ambient medium. I - Adiabatic expansion

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Adiabatic Conditions, Nebulae, Supernova Remnants, Astronomical Models, Radio Emission

Scientific paper

The adiabatic expansion of a supernova into the surrounding medium is studied numerically in one dimension. The expansion is followed from the early self-similar phase, when the ejecta envelope expands into the ambient medium, until a blast wave develops. The authors study the expansion of models of Type I and II supernovae into either the interstellar medium (with a constant density) or a dense circumstellar medium (with an r-2 density profile) surrounded by a constant density interstellar medium. It is found that numerical calculations are sensitive to both the spatial zoning and the initial ejecta configuration.

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