Evolution of the width and maximum of the temperature peak after the concentrated release of energy corresponding to 1 s of a nanoflare in the solar corona. The model parameters are detailed in Sect. 5.1. The top panel shows the HWHM, while the bottom panel shows maximum temperature. The curves were calculated with Eqs. (22)–(23) and the points were calculated with simulations. Where the points are encircled ϕ_∞ ≥ ϕ₀, making the equations a poor approximation. The gray shaded area corresponds to t ∊ [1 s, 20 s], the time frame of interest of the simulations in Polito et al. (2018).