Colour of Solar Corona Structures

Abstract

They reveal the absence of identity in energy distributions in the continua of the K-corona and photosphere. The quasi-symmetry of RCI distributions relative to the projection of the heliospheric current sheet in "the sky plane" excludes the contribution of the dust component. Reddening with distance over the entire corona at all positional angles is the first observational confirmation of theoretical calculations by Reginald et al. [8]. Therefore, the RCI can be considered as an indicator of the expansion of the corona. Different coronal structures have different RCI values. The existence of diffuse and structural components, correlation with the coronal structure, and bluing in the range <1.2-1.3 R  are noted.