Electric currents as the main cause of coronal and flare activity in the Sun and in many late-type stars

Coronal temperatures of late type stars are hundreds to thousands of times higher than the temperatures of their photospheres. Attempts to account for the existence of high coronal temperature in the Sun. by invoking wave heating of various kinds and/or by the annihilation of parts of the magnetic field above the surface and using the resulted energy to heat coronal activity; seem to be unsuccessful. In this paper. I suggest that electric currents are the means by which the Sun and most likely many late type stars produce their coronal activity. To support this idea. I bring evidence from observations occurring in solar and stellar upper atmosphere plasmas that resemble in their appearance phenomena that are the consequence of electric currents flowing in highly ionized plasmas.