Hertzsprung-Russell diagram showing known (dark blue) and new magnetic He-sdOs (light blue), as well as 4630 Å stars (violet). Merger tracks from Yu et al. (2021) for a metallicity of Z = 0.01 and masses of 0.80, 0.65, and 0.50 M_⊙ are shown as black lines (solid for core helium-burning and dashed for helium shell-burning). The prehelium main sequence phase is shown as a dotted line for 0.65 M_⊙. The Paczyński (1971) HeZAMS is shown in red, and the grey region represents the extreme horizontal branch. Orange circles represent other He-sdOs from the SALT sample.