Electron temperatures values derived for the western (red) and eastern (orange) streamers region (at the representative height of 4.25 R_⊙), obtained with the method described in this work (open circles: cold solutions; filled circles: hot solutions, see the text for details). The thick coloured lines show the electron temperature profiles derived from the inversion of the n_e curves obtained from Metis data assuming hydrostatic equilibrium. The inferred values are compared with others from the literature, as reported in the plot legend and in the text. In particular, we show T_e profiles for equatorial (E), mid-latitude (ML) streamers, and the streamer and/or coronal-hole boundary (S/CH). Profiles with H in the legend were derived from the corresponding density profiles assuming hydrostatic equilibrium.