Abstract
We propose a model for the double charged layer on the surface of the Sun's spicules. Thermal energy of the star leads to the emission of electrons, and strong gravity leads to the retention of ions and formation of a self-regulating positive charge on the surface of the star. The charge value is affected by parameters of the star: mass, radius, temperature, rotation speed, and composition. The positive surface charge is shielded by an electrons from plasma cloud and a double charged layer is formed. Electrons are accelerated in the Coulomb field and ionize atoms on the spicule surface. Ions are accelerated by the binary field and form a high-temperature corona and a fast solar wind. The hot temperature of corona of the star, the multi charged ions, the EUF and X-ray radiation, and the solar wind are all due to the electric double layer on the star's surface.