Large Hot X-Ray Sources in the Solar Corona

Energy release in solar corona is used to attend with plasma heating. For the most powerful processes, temperature of plasma increases up to millions of Kelvin. For this reason, the study of hot coronal plasma is the key for understanding mechanisms of heating of the corona and nature of solar flares. In this chapter, we analyze observation of Mg XII line (10 MK) in series of experiments onboard CORONAS satellites. We studied configuration, dynamics, and temperature distribution in hot plasma structures. The possible mechanisms of heating are discussed.