Left column: Sum of the 2F collisional heating terms (solid red line, see Eqs. (27b) and (27a)) and the 1F ambipolar heating term (black dashed line, see Eq. (29b))), at 190 s of simulated time. The factor N_T (see Eq. (32)) is introduced in all the cases. Right column: Time-average temperature for the 1F and 2F models (solid and dashed lines, respectively). Different time intervals are represented with different colours. The vertical axis range is the same in all the panels. The 2F curves are computed from Eq. (34). From top to bottom, the rows refer to the 1 s, 3 s, and 5 s wave periods. The averaging time intervals are the same for the cases of 1 s and 5 s. We also include residuals (1F–2F) to better compare the differences between the models. The vertical dashed line indicates the equipartition layer β_plasma = 1.