Red dwarf stars represent 75% of stars in the Milky Way, and 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 multi-filter photometry from VVVX, DECaPS, Pan-STARRS and WISE surveys. We performed a cross-match between the positions of a color-selected sample of M dwarfs in the VVVX Survey and the Gaia Early Data Release 3 sub-catalog of nearby stars. We then explored their stellar parameters comparing the spectral energy distribution of each object with the BT-Settl CIFIST theoretical models using the Virtual Observatory SED Analyzer (VOSA), and adopting a solar metallicity value, we obtained effective temperatures and logg. Radii were also obtained from the computed luminosities and Teff using the Stefan-Boltzmann equation. Masses and ages were computed for some of the objects ising evolutionary tracks and isochrones. Additional mass estimations were obtained with the MKs-M* relation. Spectral types were computed with VOSA fitting empirical spectral libraries. We then validated the spectral types and effective temperatures of two of our objects with spectra obtained with TSPEC/SOAR, and of our total amount of stars through a direct comparison with an independent sample from 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 Re-normalised Unit Weight Error (RUWE) values to identify unresolved companions. We present a catalog with physical parameters for 99 low-mass objects with distances from 43.2 to 111.3pc. Effective temperatures range from 2500 to 3400K, with the majority of stars in the sample compatible with being M4 dwarfs. We obtained good agreement between the stellar parameters computed with VOSA and the estimations from observed spectra, and also when comparing with an independent sample from the literature. 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 in binary systems.

Cone search capability for table J/A+A/660/A131/table1 (Astrometric information for 99 low-mass stars)

Cone search capability for table J/A+A/660/A131/table5 (Positions and Gaia photometry for co-moving objects not included in the low-mass stars sample)