J/ApJ/643/402ivo://CDS.VizieR/J/ApJ/643/402doi:10.26093/cds/vizier.16430402CDSKawka A.Vennes S.2017-06-28T06:58:10Z2008-10-19T07:06:50ZCDS support team

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

cds-question@unistra.frwhite-dwarf-starsphotometryThe New Luyten Two-Tenths catalog contains a large number of high proper motion white dwarf candidates that remain to be spectroscopically confirmed. We present new spectroscopic observations, as well as SDSS archival spectra of 49 white dwarf candidates selected from the revised NLTT catalog of Salim & Gould (2003, Cat. J/ApJ/582/1011). Of these, 34 are cool DA white dwarfs with temperatures ranging from approximately 5000 up to 11,690K, and 11 are DC white dwarfs with temperatures ranging from 4300K (NLTT 18555) up to 11000K. Three of the DA white dwarfs also display abundances of heavy elements (NLTT 3915, NLTT 44986, and NLTT 43806), and one is a cool magnetic white dwarf (NLTT 44447) with an estimated magnetic field strength of 1.3MG. We also present a new cool DQ white dwarf (NLTT 31347) with an estimated temperature of 6250K. We supplement our sample with SDSS ugriz photometry for a fraction of the newly identified white dwarfs. A kinematical study of this sample of white dwarfs, characterized by proper motions ranging from 0.136"/yr to 0.611"/yr, suggest that they belong to the thin disk population.2006ApJ...643..402Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/643/402CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/98 : NLTT Catalogue (Luyten, 1979)J/ApJ/582/1011 : Revised NLTT Catalog (Salim+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/643/402https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/643/402http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/643/402https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/643/402https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/643/402http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/643/402GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/643/402/wd (NLTT white dwarfs parameters and kinematics)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/643/402/wd?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/643/402/wd?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/643/402/wd?GETtext/xml+votable180.050000true1.835637512.50585830.0055555555555555566/897 945 964 1675 2113 2183 2733 5793 5972 6011 6228 6468 6554 6576 6619 8023 8480 8483 8654 9281 9332 9407 9501 9516 9532 9587 9606 9651 9739 9981 10902 10926 11222 11801 13327 13550 16955 17577 18474 19084 19440 19655 19982 19987 20061 21688 22818 22936 25084 25816 25852 26212 28045 32766 36416 42984 44630 47023 48358 48378 48467https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/643/402?format=asciiOpticaldefaultJ/ApJ/643/402/wdNLTT white dwarfs parameters and kinematicsONameOther name(s)meta.idcharu_Mass[)] uncertainty flag on Massmeta.code.error;phys.masscharVmagV magnitudemagphot.mag;em.opt.Vfloatn_logg[M] M for Magneticmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNLTTNLTT numbermeta.id;meta.mainintprimarypmTotal proper motion (1)arcsec/yrpos.pmfloatpmPAPosition angle of proper motion (1)degpos.pm;pos.posAngfloate_Vmagrms uncertainty on Vmagmagstat.error;phot.mag;em.opt.Vfloatr_Vmag[a-f] Vmag reference (2)meta.ref;pos.framecharV-JV-J colour index (3)magphot.color;em.opt.V;em.IR.Jfloate_V-Jrms uncertainty on V-Jmagstat.error;phot.color;em.opt.VfloatJ-HJ-H colour index (3)magphot.color;em.IR.J;em.IR.HfloatPSimbad column added by the CDSmeta.ref.urlchare_J-Hrms uncertainty on J-Hmagstat.error;phot.color;em.IR.JfloatObsObservatoriesmeta.id;instr.obstycharWDOther name(s)meta.idcharn_WD[abe, ] Note (1)meta.notecharSpTSpectral typesrc.spTypecharl_Teff[~] Limit flag on Teffmeta.code.error;phys.temperature.effectivecharTeffEffective temperatureKphys.temperature.effectiveintE_Teff? Error on Teff (upper limit)Kstat.error;stat.maxintnullablee_Teff? Error on Teff (lower limit)Kstat.error;phys.temperature.effectiveintnullablen_Teff[c] Note (1)meta.notecharlogg? Surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_logg? rms uncertainty on logglog(cm.s**-2)stat.errorfloatnullableu_logg[)] uncertainty flag on loggmeta.code.errorcharMassMasssolMassphys.massfloate_Mass? rms uncertainty on MasssolMassstat.error;phys.massfloatnullablel_VMAG[~] Limit flag on VMAGmeta.code.errorcharVMAGAbsolute V magnitudemagphys.magAbs;em.opt.Vfloatn_VMAG[d] d: see text for new cool DQ white dwarf NLTT 31347meta.notecharDistHeliocentric estimated distancepcpos.distance;pos.heliocentricintUVelU space velocitykm/sphys.veloc;pos.cartesian.xintVVelV space velocitykm/sphys.veloc;pos.cartesian.yintWVelW space velocitykm/sphys.veloc;pos.cartesian.zintSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/643/402/table2SDSS Colors of NLTT White DwarfsNLTTNLTT numbermeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS name (JHHMMSS.ss+DDMMSS.s)meta.idcharu-gSDSS u-g colour indexmagphot.color;em.opt.U;em.opt.Bfloate_u-grms uncertainty on u-gmagstat.errorfloatg-rSDSS g-r colour indexmagphot.color;em.opt.B;em.opt.Rfloate_g-rrms uncertainty on g-rmagstat.error;phot.color;em.opt.Bfloatr-iSDSS r-i colour indexmagphot.color;em.opt.R;em.opt.Ifloate_r-irms uncertainty on r-imagstat.error;phot.color;em.opt.Rfloat