THE EVOLUTION OF LOCAL INTERSTELLAR-MEDIUM

The evolution of the Local Interstellar Medium (LISM) is investigated. The processes of interaction of the supernova remnant Loop I (North P olar Spur) with the Local Cloud, the Sancini-van Woerden Fibre, the ba ckground gas of the Local Cavern, and the Local Cavern envelope are co nsidered taking into account the dynamical effects (shock wave propaga tion) as well as the effects of thermal non-equilibrium between the el ectron and ion gases, thermal conduction, radiation and evaporation of dense and cold layers. It is shown that in the process of the evoluti on of the LISM the Local Cloud can be evaporated as a result of its in teraction with Loop I. The interaction of Loop I with the Sancini-van Woerden Fibre can result in the evaporation of significant part of the Fibre that can substantially influence the position of the heliopause in the Solar System. The interaction of Loop I with the envelope of t he Local Cavern can lead to substantial (several times) increase of th e velocity of the envelope in comparison with the present value of its velocity and to radiation from this region of the envelope with a tot al intensity higher than the total luminosity of the Sun. The effect o f saturation of thermal conduction in the process of the supernova rem nant evolution in the low density media is discussed.