J/AJ/126/2449ivo://CDS.VizieR/J/AJ/126/2449doi:10.26093/cds/vizier.51262449CDSReid I.N.2023-04-06T16:50:58Z2004-10-17T13:31:32ZCDS support team

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

cds-question@unistra.frdwarf-starslate-type-starsinfrared-photometrySurveys for nearby low-luminosity dwarfs tend to avoid the crowded regions of the Galactic plane. We have devised near-infrared color-magnitude and color-color selection criteria designed to identify late-type M and early-type L dwarfs within 12pc of the Sun. We use those criteria to search for candidates within the regions of the Galactic plane (|b|<10{deg}) covered by the Second Incremental Data Release from the Two Micron All Sky Survey (<II/241>). Detailed inspection of the available photographic images of the resulting 1299 candidates confirms only two as ultracool dwarfs. Both are known proper-motion stars, identified in the recent survey by Lepine et al. (2003, Cat. <J/AJ/125/1598>). Despite the low numbers, the inferred surface density is consistent with comparable surveys at higher latitudes. We discuss the implications for the luminosity function and consider means of improving the efficiency and scope of photometric surveys in the plane.2003AJ....126.2449Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/126/2449CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/241 : 2MASS Catalog Intermediate Data Release (IPAC/UMass, 2000)I/98 : NLTT Catalogue (Luyten, 1979)J/AJ/123/2806 : Nearby stars in the NLTT catalogue (Reid+, 2002)J/AJ/123/2822 : Photometry of southern NLTT stars (Reid+, 2002)J/AJ/123/2828 : Spectroscopy of northern NLTT stars (Cruz+, 2002)J/AJ/126/2421 : 2MASS-Selected sample of ultracool dwarfs (Cruz+, 2003)J/AJ/126/3007 : Spectroscopy of faint red NLTT dwarfs (Reid+, 2003)J/AJ/128/463 : A preliminary 20pc census from the NLTT cat. (Reid+, 2004)J/AJ/130/1680 : LSPM-North proper-motion catalog nearby stars (Lepine+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/126/2449https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/126/2449http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/126/2449https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/126/2449https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/126/2449http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/126/2449GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/126/2449/table1 (Ultracool dwarf candidates with |b|<10{deg})https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/126/2449/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/126/2449/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/126/2449/table1?GETtext/xml+votable180.050000true84.85312540.64552780.005555555555555556Cone search capability for table J/AJ/126/2449/table2 (Ultracool candidates from Luyten's surveys)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/126/2449/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/126/2449/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/126/2449/table2?GETtext/xml+votable180.050000true6.1025-1.9719440.005555555555555556Cone search capability for table J/AJ/126/2449/table3 (2MASS data for LSR proper motion stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/126/2449/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/126/2449/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/126/2449/table3?GETtext/xml+votable180.050000true22.966291752.77538890.0055555555555555566/474 888 974 1160 1298 1304 1332 1353 1357 1386 1552 2435 2558 2894 3135 4037 4655 4739 5278 6216 6381 6392 6659 6777 6784 9747 10275 11249 11496 12520 12839 13083 13273 13793 13960 14056 14099 14152 14352 14430 14603 14651 14783 14858 15116 15535 16502 16949 17301 17712 17953 17985 18060 18450 19895 21251 22535 23676 23797 23929 23944 24084 24261 24313 24338 24353 24366 24413 24462 24486 24566 28457 28528 28673 28682 28685 28693-28695 28698 28703 28705 28725 28770-28771 28774 28791 28793 28796 28812-28813 28817 28820 28824 28826 28831 28833-28835 28837 28839 28848 28851-28852 28854 28856 28859 28862-28863 28867 28872 28875 28885 28897-28899 28901 28903 28905 28911 28913-28914 28918 28920-28921 28924 29090 29096 29100-29101 29121 29134 29201 29298 29445-29447 29465 29471 29508 29663 29685 29943 29948 30222 30244 30247 30264 31973 32296 40941 41445 42352 42454-42455 42457 42462 42469 42483 42493-42494 42820 42839 42983 442268.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/126/2449?format=asciiInfrareddefaultJ/AJ/126/2449/table1Ultracool dwarf candidates with |b|<10{deg}recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainJmagThe 2MASS J band magnitudemagphot.mag;em.IR.Jfloate_JmagError in Jmagmagstat.errorfloatHmagThe 2MASS H band magnitudemagphot.mag;em.IR.Hfloate_HmagError in Hmagmagstat.errorfloatKsmagThe 2MASS Ks band magnitudemagphot.mag;em.IR.Kfloate_KsmagError in Kmagmagstat.errorfloatCommAdditional commentsmeta.notechar2MASSFind the star in 2MASS (II/241, II/246) Surveymeta.refcharJ/AJ/126/2449/table2Ultracool candidates from Luyten's surveysrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNLTTNLTT (Cat. <I/98>) numbermeta.id;meta.mainintNameOther namemeta.idcharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainrmag? Red magnitude from NLTT (<I/98>) or LHS (<I/87>)magphot.mag;em.opt.RfloatnullableJmag2MASS J magnitudemagphot.mag;em.IR.JfloatJ-H2MASS J-H colour indexmagphot.color;em.IR.J;em.IR.HfloatH-Ks2MASS H-Ks colour indexmagphot.color;em.IR.H;em.IR.KfloatSpTypeSpectral typesrc.spTypecharSel[Yes No] Indicates whether the (J-H, H-Ks) colors meet our criteriameta.codecharComComments (1)meta.notechar2MASSFind the star in 2MASS (II/241, II/246) Surveymeta.refcharJ/AJ/126/2449/table32MASS data for LSR proper motion starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLSRName in LSR (Cat. J/AJ/124/1190)meta.id;meta.maincharRmagThe R band magnitudemagphot.mag;em.opt.RfloatR-J? The (R-J) colormagphot.color;em.opt;em.IRfloatnullablel_JmagLimit flag on Jmagmeta.code.errorcharJmagThe 2MASS J band magnitudemagphot.mag;em.IR.Jfloate_Jmag? Error in Jmagmagstat.errorfloatnullablel_HmagLimit flag on Hmagmeta.code.errorcharHmagThe 2MASS H band magnitudemagphot.mag;em.IR.Hfloate_Hmag? Error in Hmagmagstat.errorfloatnullablel_KsmagLimit flag on Ksmagmeta.code.errorcharKsmagThe 2MASS Ks band magnitudemagphot.mag;em.IR.Kfloate_Ksmag? Error in Ksmagmagstat.errorfloatnullableHRThe R-band reduced proper motion H = Rmag + 5 + 5log{mu}phys.magAbs;em.optfloatClassClassificationsrc.classcharComAdditional comments (1)meta.notechar2MASSFind the star in 2MASS (II/241, II/246) Surveymeta.refchar_RAPosition from LSR Catalog (J/AJ/124/1190) (right ascension part)degpos.eq.ra;meta.main_DEPosition from LSR Catalog (J/AJ/124/1190) (declination part)degpos.eq.dec;meta.main