Corona Brightness and Electron Density

Corona Brightness and Electron Density

. Variation of coronal surface brightness (left scale) and electron density (right scale) with distance from the Sunís center, in units of the Sunís radius, RO = 696 million (6.96 x 108) meters. The maximum and minimum of the solar magnetic activity cycle are designated by max. and min.. The F corona values (dashed line) are continuous with the zodiacal light. For comparison, the surface brightness for the full Moon and clear sky for day and night and during a total solar eclipse are indicated.

Copyright 2010, Professor Kenneth R. Lang, Tufts University