Among 88 nearby stars at d<20pc with lacking colours but measured parallaxes in Gaia EDR3 we found two new close (separations~3arcsec) common parallax and proper motion (CPPM) companions. The companion of a nearby (d=14.98pc) F1 star, HD 105452 B, was already imaged with the Hubble Space Telescope and now confirmed with Gaia. We classified it photometrically as M4 dwarf. The other CPPM companion, SCR J1214-2345 B orbits an M4.5 dwarf at d=10.77pc and represents the faintest brown dwarf discovery with Gaia. It was imaged in the VISTA Hemisphere Survey and partly detected in the near-infrared. Our photometric classification of T1+-3 needs spectroscopic confirmation.

A corresponding short paper was published in RNAAS: https://iopscience.iop.org/article/10.3847/2515-5172/abea23 (see also: https://arxiv.org/abs/2103.00144 )