Cooling/heating rates (left ordinate) and fluid properties (right ordinate) along streamlines. Here, ﹩{n}_{{\rm{H}}}﹩ is the number density of hydrogen nuclei. In the right column, horizontal axis is arc length (λ) measured from the wind base (where ﹩{ \mathcal B }=0﹩, Equation (3)). Vertical dotted line marks the sonic point. Left column presents the profile vertically below the wind base (i.e., ﹩z\mbox{--}{z}_{\mathrm{base}}﹩). Vertical dashed line indicates the wind base as defined by GH09. Upper row: streamline rooted at ﹩{R}_{0}=5\,\mathrm{au}﹩. Lower row: ﹩{R}_{0}=15\,\mathrm{au}﹩.