ON THE THERMAL-EQUILIBRIUM OF A MAGNETIC ARCADE IN THE SOLAR ATMOSPHERE

The distruption of high-temperature thermal equilibrium of large-scale magnetic arcades in the solar atmosphere for which the plasma density decreases significantly with height is considered. It is shown that f or low intensities of plasma heating by the waves coming from below, t he drop in density may result in the distruption of high-temperature t hermal equilibrium in very tall arches whose lengths and heights are m uch greater than the scale height of the atmosphere.