Fig. 5

Distributions of solar wind energy flux (WR) normalized to one solar radius with a ratio between α particle number density (nα) and electron number density (ne) ranging from1 to 4% for Encounters E01, E02, E04, and E05. (a)–(c): assume nα∕ne = 1, 2.5, and 4%, respectively, to illustrate the uncertainty due to the absence of α measurements. Average and median values of each histogram are indicated with Gaussian fits superimposed in blue. Center value and standard deviation (full-width-half-maximum) of the Gaussian fit are also presented.
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