Study of the Influence of the Background Neutral Component on the Dynamics of the Envelope in Supernova Remnants

The influence of neutrals on the development of multidimensional dense-shell instabilities in supernova remnants is investigated. We present a model in which the neutrals are described as a permanently present additional medium (with its own parameters: temperature, density, velocity, etc.) that interacts with the ion component through collisional processes. Within this model we have found that the presence of neutrals suppresses the growth of instabilities in the case where they dominate in the total density of the medium.