J/MNRAS/538/3144ivo://CDS.VizieR/J/MNRAS/538/3144CDSCheng G.Jones H.R.A.Smart R.L.Marocco F.Cooper W.J.Burgasser A.,Beamin J.C.Pinfield D.J.Gagne J.Moranta L.2025-09-29T16:22:32Z2025-09-12T08:23:20ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frlate-type-starsm-starsl-dwarfsproper-motionsstellar-spectral-typesinfrared-astronomyspectroscopyNear-infrared spectra from the IRTF/SpeX and Blanco/ARCoIRIS telescope/instrument combinations are used for spectroscopic classification, to measure radial velocities, and for the inference of astrophysical properties of 51 Gaia-selected nearby ultracool dwarfs. In this sample, 44 are newly classified in the near infrared. All but one of the UCDs are within 100pc, and 37 lie within 50pc. We find a total of 26 M-types, 24 L-types, and one T-type in our sample. The positions of the majority of the UCDs on colour-magnitude diagrams and with evolutionary cooling track plots indicate that they are largely old and stellar in nature. There are a few UCDs of particular interest which lie away from expected trends, highlighting potential young, binary, and thick disc/subdwarf UCDs. From spectral and kinematic analyses, we identify UCDs of particular interest for further investigation, including seven potentially young UCDs, three thick disc UCDs, one subdwarf, six wide binaries, and six unresolved binaries.2025MNRAS.538.3144Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/538/3144CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/485/4423 : The Gaia ultracool dwarf sample. II. (Smart+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/538/3144https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/538/3144http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/538/3144https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/538/3144https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/538/3144http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/538/3144GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/538/3144/tabled1 (Collated data for the UCDs in the sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/538/3144/tabled1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/538/3144/tabled1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/538/3144/tabled1?GETtext/xml+votable180.050000true77.228262533.32144940.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/MNRAS/538/31446/1291 4310 4756 5641 5971 6013 6408 6421 6925 7228 7249 8342 9174 9688 9740 10421 10500 10587 10839 11226 11403 12999 14764 22875 23027 24732 25104 26236 26279 26287 26322 26331 26600 26965 28665 29323 31280 31482 32418 34080 37502 38039 38683 40206 40779 40941 42220 42398 42422 42434 478571.1166583743361574e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/538/3144?format=asciiInfrareddefaultJ/MNRAS/538/3144/tabled1Collated data for the UCDs in the samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNameObject short name (JHHMM+DDMMA)meta.idchare_W1mag? Uncertainty in W1magmagstat.error;phot.magfloatnullableW2mag? CatWISE2020 W2-band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_W2mag? Uncertainty in W2magmagstat.error;phot.magfloatnullablel_GmagLimit flag on Gmag for J1243+6001meta.code.errorcharGmagGaia DR3 G-band magnitudemagphot.mag;em.optfloate_Gmag? Uncertainty in Gmagmagstat.error;phot.magfloatnullableGMAG? Gaia DR3 G-band absolute magnitudemagphys.magAbsfloatnullable_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.raindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decindexedGaiaDR3? Gaia DR3 source IDmeta.idnullableRA_ICRSRight ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.maine_RA_ICRS? Uncertainty in RAmasstat.error;pos.eq.radoublenullableDE_ICRSDeclination (ICRS) at Ep=2016.0)degpos.eq.dec;meta.maine_DE_ICRS? Uncertainty in DEmasstat.error;pos.eq.decdoublenullableSimbadSIMBAD object namemeta.id;meta.maincharplx? Gaia DR3 parallaxmaspos.parallax.trigdoublenullablee_plx? Uncertainty in parallaxmasstat.error;pos.parallaxdoublenullableDist? Parallactic distance from Gaia DR3 parallaxpcpos.distancefloatnullablee_Dist? Uncertainty in parallactic distancepcstat.errorfloatnullableSpecDistSpectrophotometric distancepcpos.distancefloate_SpecDistUncertainty in spec_distancepcstat.errorfloatpmRA? Gaia proper motion in RAmas/yrpos.pm;pos.eq.radoublenullablee_pmRA? Uncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.radoublenullablepmDE? Gaia proper motion in DEmas/yrpos.pm;pos.eq.decdoublenullablee_pmDE? Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decdoublenullableSpTypeSpectroscopic spectral classificationsrc.spTypechare_SpTypeUncertainty in SpTypestat.error;src.spTypefloatr_SpTypeLBibcode for literature SpTypemeta.ref;pos.framecharPhTypePhotometric spectral type classificationsrc.spTypechare_PhTypeUncertainty in phtmeta.notefloatPhTypeLPhotometric spectral classification from literaturesrc.spTypecharr_PhTypeBibcode for literature PhTypemeta.notecharvtan? Tangential velocitykm/sphys.veloc.transversedoublenullablee_vtan? Uncertainty in vtankm/sstat.errorfloatnullableRV? Radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RV? Uncertainty in RVkm/sstat.errorfloatnullableRVL? Radial velocity from literaturekm/sphys.veloc;pos.heliocentricfloatnullabler_RVL? Bibcode for literature RVmeta.ref;pos.framecharUvel? Space velocity U-componentkm/sphys.velocfloatnullableVvel? Space velocity V-componentkm/sphys.velocfloatnullableWvel? Space velocity W-componentkm/sphys.velocfloatnullableTeffEffective temperatureKphys.temperature.effectiveinte_TeffUncertainty on teffKstat.error;phys.temperature.effectiveintRUWE? Gaia DR3 re-normalized unit weight error valuestat.errorfloatnullableCompanionGaia DR3 source ID of wide companion objectmeta.id.assoccharBanyanBANYAN sigma young moving groupmeta.id.parentcharPBanyanProbability of group membershipstat.probability;pos.lgfloatgravitySurface gravity classificationmeta.code.class;phys.gravitycharspShow the spectrummeta.ref.urlcharNotesYoung, thick disc, binarymeta.notecharJmag2MASS J-band magnitudemagphot.mag;em.IR.Jfloate_Jmag? Uncertainty in Jmagmagstat.error;phot.magfloatnullableHmag? 2MASS H-band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Uncertainty in Hmagmagstat.error;phot.magfloatnullableKmag? 2MASS K-band magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? Uncertainty in Kmagmagstat.error;phot.magfloatnullableW1mag? CatWISE2020 W1-band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_GMAG? Uncertainty in GMAGmagstat.errorfloatnullableFileNameName of the fits spectrum file in subdirectory fitsmeta.id;meta.fitscharSpTypeLSpectroscopic spectral classification from literaturesrc.spTypechar