VVVX near-IR photometry for 99 low-mass stars in the Gaia EDR3 Catalog of Nearby Stars

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dc.article.numberA131
dc.catalogadorvzp
dc.contributor.authorMejias, A.
dc.contributor.authorMinniti, D.
dc.contributor.authorAlonso-Garcia, J.
dc.contributor.authorBeamin Muhlenbrock, Juan Carlos
dc.contributor.authorSaito, R. K.
dc.contributor.authorSolano, E.
dc.date.accessioned2024-03-14T18:31:13Z
dc.date.available2024-03-14T18:31:13Z
dc.date.issued2022
dc.description.abstractContext. 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.Aims. 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 the Vista Variables in the Via Lactea eXtended (VVVX) Survey, the DECam Plane Survey, the Panoramic Survey Telescope and Rapid Response System, and the Wide-field Infrared Survey Explorer.Methods. We performed a cross-matching procedure among 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 explored their stellar parameters and spectral types using the Virtual Observatory SED Analyzer (VOSA). Radii were also obtained from the computed luminosities and T-eff 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 M-Ks - 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 renormalized unit weight error (RUWE) values to identify unresolved companions.Results. We present a catalog of physical parameters for 99 low-mass objects with distances from 43.2 to 111.3 pc. Effective temperatures range from 2500 to 3400 K, with the majority of stars in the sample compatible with the status of 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.
dc.fechaingreso.objetodigital2024-11-14
dc.fuente.origenORCID
dc.identifier.doi10.1051/0004-6361/202141759
dc.identifier.eissn1432-0746
dc.identifier.issn0004-6361
dc.identifier.urihttps://publons.com/wos-op/publon/52935673/
dc.identifier.urihttps://doi.org/10.1051/0004-6361/20214175
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/84428
dc.information.autorucInstituto de Física; Beamin Muhlenbrock Juan Carlos; 0000-0002-8409-6534; 154617
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final10
dc.pagina.inicio1
dc.revistaAstronomy & Astrophysics
dc.rightsacceso restringido
dc.subjectGalaxy: disk
dc.subjectSolar neighborhood
dc.subjectStars: low-mass
dc.subjectStars: fundamental parameters
dc.subjectVirtual observatory tools
dc.subject.ddc520
dc.subject.deweyAstronomía
dc.titleVVVX near-IR photometry for 99 low-mass stars in the Gaia EDR3 Catalog of Nearby Stars
dc.typeartículo
dc.volumen660
sipa.codpersvinculados154617
sipa.trazabilidadORCID;2024-03-11
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