Fig. 11

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Contour plot of X computed using Eq. (12) as a function of the dimensionless intensity of the temperature increments and of the stratification parameter
. The red solid line corresponds to the threshold value X = 0.9 separating the region of parameters in which the model predicts a Sun-like steep increase of temperature and ahot corona (X > 0.9, yellowish colours) from that where it does not (X < 0.9, bluish colours). The magenta horizontal line is the maximum value of
as a function of M.
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