1205.0267 (Beidi Peng)

A geometrical model for polar plumes observed by STEREO SECCH    [PDF]

Beidi Peng

Solar polar plumes are bright radial rays rooted at the sun's polar areas. They are widely believed to have the structure of expanding tube. A four degree polynomial function was assumed to represent the change of cross section diameter as a function of height and four unknown parameters were calculated with measured average widths of total 31 plumes at 4 heights (1.04$R_s$,1.10$R_s$,1.16$R_s$,1.20$R_s$).

View original: http://arxiv.org/abs/1205.0267