Brightness Temperatures and Electron Concentrations of the Open North Polar Region of the Sun as Observed in the Centimeter Wavelength Range During the Maximum Phase of the Solar Eclipse of 29.03.2006

The source of radio emission from the open northwestern limb of the Sun (not covered by the Moon) during the maximum phase (F = 0.998) of the solar eclipse of March 29, 2006 was studied using the RATAN-600 radio telescope observations in the centimeter wavelength range (1.03–30.7 cm). When processing observations, the modeling of radio emission from the Sun and the Moon was carried out with the assumption of circular symmetry in the distribution of radio emission brightness temperatures in the solar and lunar atmospheres. The obtained distributions of the brightness temperature and electron concentration at the open northwestern limb of the Sun with distance from the center of the optical disk are discussed. The presented distributions of brightness temperatures indicate a possible lower limit of generation of the solar wind from the open northern polar region of the Sun.

the Sun, solar eclipse, radio telescope, solar radio emission