Comparison to the modeling of C24 for their case of Trappist- 1 e, i.e., for a layer d_i =1000 km and a magnetic field variation dB/dt = 0.4 nT/s. We made use of their Eq. 13 to trace Q as a function of σ_P (black dotted line). The red and black circles correspond to the red and black circles in their Figure 4 (in the case d_i=1000 km). The gray area labels the range of application considered in C24. The results of our model are shown by the blue line. The maximal heating rate Q_max is labeled by the dotted blue line. The vertical dash-dotted gray line labels the Pedersen conductivity ${\sigma }_P^0$ for which δ_P = d_i.