J/MNRAS/383/831ivo://CDS.VizieR/J/MNRAS/383/831doi:10.26093/cds/vizier.73830831CDSPhan-Bao N.Bessell M.S.Martin E.L.Simon G.Borsenberger J.Tata R.,Guibert J.Crifo F.Forveille T.Delfosse X.Lim J.De Batz B.2024-07-06T20:15:21Z2008-09-26T09:38:57ZCDS support team

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

cds-question@unistra.frm-starsinfrared-photometrystellar-distanceproper-motionsWe report on new nearby L and late-M dwarfs (d_phot_<=30pc) discovered in our search for nearby ultracool dwarfs (I-J>=3.0, later than M8.0) in the Galactic plane (|b|<15{deg}) over 4800 deg^2^ in the Deep Near Infrared Survey of t he Southern Sky (DENIS) data base. We used late-M (>=M8.0), L and T dwarfs with accurate trigonometric parallaxes to calibrate the M_J_ versus I-J colour-luminosity relation. The resulting photometric distances have standard errors of ~15 per cent, which we used to select candidates dphot <=30pc. We measured proper motions from multi-epoch images found in the public archives ALADIN, DSS, 2MASS and DENIS, with at least three distinct epochs and time baselines of 10-21yr. We then used the Maximum Reduced Proper Motion method to select 28 candidates as ultracool dwarfs (M8.0-L8.0) and to reject one as a distant red star. Our low-resolution optical spectra confirmed that 26 were indeed ultracool dwarfs, with spectral types from M8.0 to L5.5. Two contaminants and one rejected by the maximum reduced proper motion cut-off were all reddened F-K main sequence stars. 20 of these 26 ultracool dwarfs are new nearby ultracool dwarf members, three L dwarfs within 15pc with one L3.5 at only ~10pc.2008MNRAS.383..831Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/383/831CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/denis : The DENIS database (DENIS Consortium, 2005)J/AJ/123/3409 : SDSS M, L, and T dwarfs (Hawley+, 2002)J/AJ/126/2421 : 2MASS-Selected sample of ultracool dwarfs (Cruz+, 2003)J/AJ/126/2449 : Nearby ultracool dwarfs in galactic plane (Reid+, 2003)J/AJ/127/3553 : JHK mag and spectroscopy for L and T dwarfs (Knapp+, 2004)J/AJ/133/439 : Luminosity function of M7-L8 ultracool dwarfs (Cruz+, 2007)J/A+A/380/590 : 30 DENIS late-M dwarfs between 15 and 30pc (Phan-Bao+, 2001)J/A+A/401/959 : 35 DENIS late-M dwarfs between 10 and 30pc (Phan-Bao+, 2003)J/A+A/441/653 : 32 DENIS nearby red dwarfs (Crifo+, 2005)J/A+A/446/515 : Distances of nearby ultracool dwarfs (Phan-Bao+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/383/831https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/383/831http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/383/831https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/383/831https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/383/831http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/383/831GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/383/831/tables (26 nearby L and late-M dwarfs (tables 2, 3, 6 and 7 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/383/831/tables?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/383/831/tables?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/383/831/tables?GETtext/xml+votable180.050000true93.9555-1.01144440.0055555555555555566/20738 20754 20891 21728 22177 29018 29301 29305 38039 38145 38164 38176 39185 39760 39807 40485 40669 41139 41159 41557 41612 42090 42261 42309 42635 43062https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/383/831?format=asciiInfrareddefaultJ/MNRAS/383/831/tables26 nearby L and late-M dwarfs (tables 2, 3, 6 and 7 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDENISDENIS name (based on J2000 position)meta.id;meta.maincharImagDENIS I magnitudemagphot.mag;em.opt.Ifloate_ImagDENIS I magnitude errormagstat.error;phot.mag;em.opt.IfloatI-JDENIS I-J colour indexmagphot.color;em.IR;em.IRfloatJ-KDENIS J-K colour indexmagphot.color;em.IR.J;em.IR.Kfloate_JmagDENIS J magnitude errormagstat.error;phot.mag;em.IR.Jfloate_KmagDENIS K magnitude errormagstat.error;phot.mag;em.IR.KfloatpmRAProper motion in right ascensionarcsec/yrpos.pm;pos.eq.rafloate_pmRApmRA errorarcsec/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in declinationarcsec/yrpos.pm;pos.eq.decfloate_pmDEpmDE errorarcsec/yrstat.error;pos.pm;pos.eq.decfloatPC3The PC3 spectral index (1)spect.indexfloate_PC3PC3 errorstat.errorfloatTiO5The TiO5 spectral index (2)spect.indexfloate_TiO5TiO5 errorstat.errorfloatVOaThe VOa spectral index (3)spect.indexfloate_VOaVOa errorstat.errorfloatSpTypeAdopted spectral typesrc.spTypecharJMAGAbsolute J band magnitudemagphys.magAbs;em.IR.JfloatDistEstimated distance from JMAGpcpos.distance;pos.heliocentricfloate_DistDist errorpcstat.errorfloatVtTangential velocitykm/sphys.veloc.transverseinte_VtVt errorkm/sstat.errorintEWHaHalpha equivalent width (in Angstroem)0.1nmspect.line.eqWidth;em.line.Halphafloatn_EWHa[*] * when EWHa is an upper limitmeta.notecharRef? Reference for previously discovered ultracool dwarfs (4)meta.ref;pos.frameintnullableSimbadSimbad column added by the CDScharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.main