Coudé Hα profile of one of the solar proxies in Table 3. The red and black lines represent the synthetic and observed profiles. The shaded regions are the windows of fits and the circles represent the continuum bins colour-coded according to their frequency of appearance in all Coudé spectra. The most frequent continuum windows are observed at [6500.25, 6500.50], [6504.50, 6505.00], [6619.70, 6620.50], [6625.60, 6625.80] and [6626.50, 6626.80]. Bottom panel: histogram of temperatures related to the wavelength bins within the windows of fits. A Gaussian is fitted to its median and robust standard deviation.