A simple shock wave model of supernova remnant IC 443

This paper contains a model of supernova remnant IC 443 and the interstellar gas surrounding it. The basis of this model is the analysis of the motion of non-spherical adiabatic shock waves due to Kompaneets (1960). Observations of adjacent Hi and Hii regions have been used by several authors to determine the density of gas in the neighbourhood of IC 443. The model gives for the explosion energy and age of IC 443, 1.8×10⁵⁰ erg and 13 000 yr, respectively. The expansion velocity of IC 443 using the present model is in reasonabel agreement with observations of the remnant.