Period/companion mass diagram of the published HW Vir systems. A summary of the parameters can be found in Schaffenroth et al. (2018) and references therein. The gray area marks the hydrogen-burning limit. Companions with smaller masses are substellar. The solid red line denotes the minimum period at which a companion of a certain mass can exist in orbit around a canonical-mass sdB, assuming the companion cannot exceed its Roche radius. In the lower panel the period distribution of the newly discovered HW Vir systems presented here is shown for comparison (OGLE targets in black and ATLAS targets in gray).