Period - mass distribution: the CJs and BDs candidates are shown as cyan circles and green diamonds, respectively. The SCs with m sin i measurement are represented by yellow stars, while the SCs with true masses from HIPPARCOS data are represented by yellow squares. The indigo square represents HD 8291 B with its true mass inferred from the Gaia data. The red (at 13 M_J) and blue (at 75 M_J) dashed linesseparates BDs from CJs and SCs, respectively.