(a) Data distribution, (b) median values of the scalar proton temperature, (c) proton temperature anisotropy, and (d) proton–electron temperature ratio in the (﹩{\epsilon }_{p}﹩, ﹩{\beta }_{| | p}﹩) space. The horizontal line at ﹩{\epsilon }_{p}={10}^{-1.6}﹩ denotes the point where stochastic heating starts operating. Vertical lines at ﹩\beta =0.2﹩, 1, and 2 mark the cross sections, which are highlighted in Figure 3.