Comparison with previous models. Left: HRD of a rotating 300 M_⊙ at Z = 0.014 from the work of Yusof et al. (2013) and from this work. The beginning of each burning phase (defined as the moment when the central abundance of the element concerned decreases by 1%) and the end of it (defined as the moment when the central abundance is lower than 10⁻⁵) are displayed as open circles and crosses, respectively. Right: central temperature as a function of the central density for the same models. A zoom can be seen in the upper left displaying the region where the model starts undergoing pair-creation inside the core, leading the model with the new EOS – which takes this effect into account – to contract and expand rapidly as the pair-creation reduces the radiative pressure.