Kiel diagram of ESP-HS results obtained in BP/RP+RVS (left panel) and BP/RP-only (right panel) processing modes. Left panel: evolutionary tracks of Georgy et al. (2013) for solar metallicity, and = 0.8 (rotation at 80% of its critical velocity) are shown in blue. The initial mass in solar masses is indicated at the start of each track. Right panel: region occupied by the hot HB stars is delimited by the expected zero age and terminal age HB lines, labelled ZAHB and TAHB, respectively, of which the boundaries are taken from Dorman et al. (1993).