  To increase the number of sources with Very Long Baseline Interferometry
(VLBI) astrometry available for comparison with the Gaia results, we have
observed 31 young stars with recently reported radio emission. These stars are
all in the Gaia DR3 catalog and were suggested, on the basis of conventional
interferometry observations, to be non-thermal radio emitters and, therefore,
good candidates for VLBI detections. The observations were carried out with the
Very Long Baseline Array (VLBA) at two epochs separated by a few days and
yielded 10 detections (a $\sim$30\% detection rate). Using the astrometric Gaia
results, we have extrapolated the target positions to the epochs of our radio
observations and compared them with the position of the radio sources. For
seven objects, the optical and radio positions are coincident within five times
their combined position errors. Three targets, however, have position
discrepancies above eight times the position errors, indicating different
emitting sources at optical and radio wavelengths. In one case, the VLBA
emission is very likely associated with a known companion of the primary
target. In the other two cases, we associate the VLBA emission with previously
unknown companions, but further observations will be needed to confirm this.
