  Red dwarf stars, which represent 75% of stars in the Milky Way, can be
studied in great detail in the solar neighborhood where the sample is more
complete. We intend to better characterize red dwarf candidates selected from
the Gaia Catalog of Nearby Stars using optical and near-infrared photometry
from the VVVX Survey, DECaPS, Pan-STARRS, and WISE. We performed a
cross-matching procedure among the positions of a color-selected sample of M
dwarfs in the VVVX Survey and the Gaia EDR3 sub-catalog of nearby stars. We
explored their stellar parameters and spectral types using VOSA. Radii were
also obtained using the Stefan-Boltzmann equation. Masses and ages were
computed for some of the objects using evolutionary tracks and isochrones.
Additional mass estimations were obtained with the MKs - M* relation. We then
validated our results for the stellar parameters of two of our objects with
spectra obtained with the TripleSpec instrument at the SOAR telescope, as well
as those of our total amount of stars through a direct comparison with an
independent sample from the literature. We revised the objects in our sample
and compared their proper motion vectors with other sources within 30" to
identify possible companions and probed their RUWE values to identify
unresolved companions. We present a catalog of physical parameters for 99
low-mass objects with distances from 43.2 to 111.3 pc. Teffs range from 2500 to
3400 K, with the majority of stars in the sample compatible with being M4
dwarfs. We obtained a good agreement between the stellar parameters computed
with VOSA and the estimations from observed spectra, also when comparing with
an independent sample from the literature. The distribution of masses obtained
with VOSA is concentrated toward the very low-mass regime. Eight objects
present values of RUWE >= 1.4 and seven are consistent with being part of a
binary system.
