Left panel: Diagram of T_eff – log g for sdB pulsators, including model tracks for the EHB (shaded gray; Dorman et al. 1993) and He-core pre-WDs with masses between 0.29–0.34 M_⊙ (black lines; Kupfer et al. 2019). Right panel: Distribution of T_eff – log(N_He/N_H) for the same objects. The classified rm-sdBVs from ZTF are plotted with green circles along with CS 1246 and BA09, plotted using a gold star and purple diamond, respectively. Blue squares are the known BLAPs with atmospheric properties obtained from spectra; those marked with a white X represent He-poor (log(N_He/N_H) < -1.5) BLAPs. Orange, red and black points represent sdBV_r, sdBV_s, and sdBV_rs stars, respectively (sample from Holdsworth et al. 2017). Arrows with labels indicating the ZTF-sdBVs classified as a BLAP or sdBV_r are included.