J/ApJ/714/1037ivo://CDS.VizieR/J/ApJ/714/1037doi:10.26093/cds/vizier.17141037CDSLimoges M.-M.Bergeron P.2017-06-30T05:48:26Z2012-05-21T12:24:45ZCDS support team

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

cds-question@unistra.frwhite-dwarf-starsultraviolet-astronomyspectroscopystellar-massesWe present a spectroscopic analysis of white dwarfs found in the Kiso survey. Spectroscopic observations at high signal-to-noise ratio have been obtained for all DA and DB stars in the Kiso Schmidt ultraviolet excess survey (KUV stars). These observations led to the reclassification of several KUV objects, including the discovery of three unresolved DA+DB double-degenerate binaries. The atmospheric parameters (T_eff_ and logg) are obtained from detailed model atmosphere fits to optical spectroscopic data. The mass distribution of our sample is characterized by a mean value of 0.606M_{sun}_ and a dispersion of 0.135M_{sun}_ for DA stars, and 0.758M_{sun}_ and a dispersion of 0.192M_{sun}_ for DB stars. Absolute visual magnitudes obtained from our spectroscopic fits allow us to derive an improved luminosity function for the DA and DB stars identified in the Kiso survey. Our luminosity function is found to be significantly different from earlier estimates based on empirical photometric calibrations of M_V_ for the same sample. The results for the DA stars now appear entirely consistent with those obtained for the PG survey using the same spectroscopic approach. The space density for DA stars with M_V_<=12.75 is 2.80x10^-4^pc^-3^ in the Kiso survey, which is 9.6% smaller than the value found in the PG survey.2010ApJ...714.1037Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/714/1037CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/wd : Spectroscopically identified white dwarfs (McCook+, 2014)III/235 : Spectroscopically Identified White Dwarfs (McCook+, 2008)II/106 : Kiso Ultraviolet Catalog (KUV) (Noguchi+ 1980-1984)J/MNRAS/417/1210 : DA-white dwarfs from SDSS and UKIDSS (Girven+, 2011)J/MNRAS/411/2770 : Hot white dwarfs in GALEX-DR5 (Bianchi+, 2011)J/AJ/135/1239 : Spectral distances to DA white dwarfs (Holberg+, 2008)J/AJ/132/676 : SDSS hot DB white dwarfs (Eisenstein+, 2006)J/AJ/131/582 : Cool white dwarfs in the SDSS (Kilic+, 2006)J/ApJS/147/145 : IUE low-dispersion spectra of white dwarfs (Holberg+, 2003)J/ApJS/133/413 : BVRIJHK photometry of cool white dwarfs (Bergeron+, 2001)J/A+A/363/1040 : DB white dwarfs from the Hamburg/ESO survey (Friedrich+, 2000)J/ApJS/119/207 : IUE echelle spectra of hot white dwarfs (Holberg+, 1998)J/ApJS/61/569 : KPD UV-excess objects (Downes+, 1986)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/714/1037https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/714/1037http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/714/1037https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/714/1037https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/714/1037http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/714/1037GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/714/1037/WDs (Atmospheric parameters of DA and DB stars from the KUV sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/714/1037/WDs?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/714/1037/WDs?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/714/1037/WDs?GETtext/xml+votable180.050000true8.126315-17.889420.0055555555555555566/905 930 936 943 951 958 970 996 2325 5047 5050 5082 5091 5096 5114 5118 5303 5305 5311 5450 5457 5466 5481 5636 5648 5652 5653 5697 5700 5711 5720 5738 5765 5778 5801 6298 6319 6381 6449 6452 6454 6455 6457 6464 6465 6466 6468 6471 6477 6479 6486 6488 6500 6502 6541 6545 6547 6549 6550 8501 8524 8525 8546 8550 8561 8903 8908 8909 8911 8919 8923 9336 9424 9433 9463 9468 9471 9602 9796 9814 10378 10404 10408 10410 10411 10417 10504 10512 10519 10520 10525 16032 16039 16046 16052 16158 16694 16730 16749 16754 16796 16799 16842 17475 17484 17490 17520 17527 19319 19624 19625 19628 19629 19970 19975 19979 19980 19994 20001 20008 20025 20030 20100 20188 20212 20360 23099 23101 23103 23151 23174 23180 23184 23186 23187 23189 23194 23196 23198 23208 23226 23233 23236 23241 23243 23260 23268 23286 23407 23456 23457 23468 23476 23490 23495 23499 23501 23507 23516 23525 23533 23544 23545 23549 24102 24305 28153 28159 28500 28505 28666 35782 35790 35811 35817 35823 35826 36730 36838 36858 36861https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/714/1037?format=asciiUVOpticaldefaultJ/ApJ/714/1037/WDsAtmospheric parameters of DA and DB stars from the KUV samplee_TeffTeff uncertaintyKstat.error;phys.temperature.effectiveintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKUVKUV identification (HHMMm+DDMM; B1950) (1)meta.id;meta.maincharWDWD identification (HHMM+DDdA; B1950) (2)meta.idcharSpSpectral type of white dwarf (DA or DB)src.spTypecharTeffEffective temperatureKphys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloate_logglogg uncertaintylog(cm.s**-2)stat.errorfloatlogH/He? Hydrogen abundance (only for DBA stars)phys.abund.XfloatnullableMassStellar masssolMassphys.massfloate_MassMass uncertaintysolMassstat.error;phys.massfloatVMagAbsolute visual magnitude (M_V_)magphys.magAbs;em.opt.VfloatlogLLog of luminositylog(solLum)phys.luminosityfloatVmagApparent V-band magnitude from McCook & Sion (2008, Cat. III/235)magphot.mag;em.opt.VfloatDistDistancepcpos.distance;pos.heliocentricint1/vmax? The 1/v_max_ value (3)0.5pc**-3.mag**-1stat.fit.paramdoublenullablelogtThe WD cooling time (log{tau})log(yr)time.agefloatNotes[1-8, ] Individual note(s) (4)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from Kiso Ultraviolet Catalog (KUV) catalog (right ascension part)degpos.eq.ra;meta.main_DEPositions from Kiso Ultraviolet Catalog (KUV) catalog (declination part)degpos.eq.dec;meta.main