Evolution of central temperature (T_C) vs. central density (ρ_C) for rotating models of 15 M_⊙ at solar metallicity, shown for the three nuclear reaction rate references considered in this work along with the full Hindrance scenario (HIN model) with each model colour-coded accordingly. Nuclear ignition points are marked by crosses. Models from D24 are indicated in dashed-lines for the CF88, HIN, and HIN(RES) models. The dash-dotted grey line indicates the boundary for degenerate conditions inside the core, while the shaded grey area denotes the domain affected by electron-positron pair instability.