J/AJ/135/1225ivo://CDS.VizieR/J/AJ/135/1225doi:10.26093/cds/vizier.51351225CDSHolberg J.B.Sion E.M.Oswalt T.McCook G.P.Foran S.Subasavage J.P.2017-06-20T13:16:17Z2010-07-29T11:49:06ZCDS support team

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

cds-question@unistra.frvisible-astronomytrigonometric-parallaxwhite-dwarf-starsstellar-spectral-typesWe have conducted a detailed new survey of the local population of white dwarfs lying within 20pc of the Sun. A new revised catalog of local white dwarfs containing 122 entries (126 individual degenerate stars) is presented. This list contains 27 white dwarfs not included in a previous list from 2002, as well as new and recently published trigonometric parallaxes. In several cases new members of the local white dwarf population have come to light through accurate photometric distance estimates. In addition, a suspected new double degenerate system (WD 0423+120) has been identified. The 20pc sample is currently estimated to be 80% complete. Using a variety of recent spectroscopic, photometric, and trigonometric distance determinations, we re-compute a space density of 4.8+/-0.5x10^-3^pc^-3^ corresponding to a mass density of 3.2+/-0.3x10^-3^M_{sun}_pc^-3^ from the complete portion of the sample within 13pc. We find an overall mean mass for the local white dwarfs of 0.665M_{sun}_, a value larger than most other non-volume-limited estimates. Although the sample is small, we find no evidence of a correlation between mass and temperature in which white dwarfs below 13000K are systematically more massive than those above this temperature. Within 20pc 25% of the white dwarfs are in binary systems (including double degenerate systems). Approximately 6% are double degenerates and 6.5% are Sirius-like systems. The fraction of magnetic white dwarfs in the local population is found to be 13%.2008AJ....135.1225Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/135/1225CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://www.astronomy.villanova.edu/WDCatalog/index.html : WD Villanova catalogJ/ApJS/133/413 : BVRIJHK photometry of cool white dwarfs (Bergeron+, 2001)J/A+A/378/556 : UVES/VLT spectra of white dwarfs (Koester+, 2001)J/ApJ/571/512 : Distances of white dwarf stars (Holberg+, 2002)J/ApJ/631/1100 : Atmospheric parameters of DA white dwarfs (Gianninas+, 2005)J/ApJS/161/394 : Low-luminosity companions to white dwarfs (Farihi+, 2005)J/ApJ/643/402 : Cool white dwarfs in the solar neighborhood (Kawka+, 2006)J/ApJS/167/40 : SDSS4 confirmed white dwarfs catalog (Eisenstein+, 2006)J/ApJ/654/499 : H-rich white dwarfs spectropolarimetric survey (Kawka+, 2007)J/AJ/134/252 : New nearby white dwarf systems (Subasavage+, 2007)J/ApJ/663/1291 : DZ stars in SDSS DR4 (Dufour+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/135/1225https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/135/1225http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/135/1225https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/135/1225https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/135/1225http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/135/1225GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/135/1225/localWD (Local sample of white dwarfs: physical parameters and distances)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/135/1225/localWD?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/135/1225/localWD?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/135/1225/localWD?GETtext/xml+votable180.050000true0.667-34.22741670.005555555555555556Cone search capability for table J/AJ/135/1225/table4 (Possible white dwarfs within 20pc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/135/1225/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/135/1225/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/135/1225/table4?GETtext/xml+votable180.050000true15.95808335.07519440.0055555555555555566/319 897 1077 1381 2183 2366 2497 2536 2733 2808 3222 3345 3682 4566 5065 5097 6104 6328 6454 6576 6619 6705 6934 7252 7267 7478 7652 7740 8483 8894 9332 9458 9501 9606 9739 9985 10169 10173 11131 11193 11645 12157 12268 12738 13013 13103 13295 13391 13904 14391 14586 15280 15335 15462 16078 16158 16433 16440 16697 17181 17331 17625 17733 18133 18139 18415 18556 18902 19042 19987 20155 20371 20404 20940 21194 21479 21691 22214 22300 22345 22638 22709 22870 22936 23174 23235 23457 23497 23591 24713 24795 25084 25250 25255 25712 25792 26321 26386 26471 26740 27385 28271 28559 29777 29855 30093 30694 31179 31677 31735 31956 31973 32436 33011 33015 33384 34026 35412 35490 35957 36416 36567 37464 37473 37477 37890 39421 39709 39807 40070 40283 40623 40747 41017 41125 41638 42700 42760 43239 43537 43805 44639 45110 45173 45177 45649 45782 45921 46598 46709 46841 47476 47957 48358 48728 49125https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/135/1225?format=asciiOpticaldefaultJ/AJ/135/1225/localWDLocal sample of white dwarfs: physical parameters and distances_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWDWD number (HHMM+DDM.N, B1950)meta.id;meta.maincharn_WD[a-c, ] Note on WD (1)meta.notecharONameOther namemeta.idcharSpTypeSpectral typesrc.spTypecharVmagVisual magnitudemagphot.mag;em.opt.Vfloatpi? Trigonometric parallaxmaspos.parallax.trigfloatnullablee_pi? Parallaxe uncertaintymasstat.errorfloatnullabler_piReference(s) number for pi; see refs.dat filemeta.ref;pos.framecharBinBinarity (2)meta.code.multipcharCompComposition (He or H)meta.notecharTeff? Effective temperatureKphys.temperature.effectiveintnullablee_Teff? Teff uncertaintyKstat.error;phys.temperature.effectiveintnullablelogg? Surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_logg? logg uncertaintylog(cm.s**-2)stat.errorfloatnullableMass? MasssolMassphys.massfloatnullablee_Mass? Mass uncertaintysolMassstat.error;phys.massfloatnullableRef? Reference; see refs.dat filemeta.ref;pos.frameintnullabler.tr? Trigonometric distancepcpos.distance;pos.parallax.trig;pos.heliocentricfloatnullablee_r.tr? r.tr uncertaintypcstat.errorfloatnullabler.ph? Photometric distancepcpos.distancefloatnullablee_r.ph? r.ph uncertaintypcstat.errorfloatnullabler? Final adopted distancepcpos.distance;phys.atmol.final;pos.heliocentricfloatnullablee_r? Adopted distance uncertaintypcstat.errorfloatnullablen_r[a] Weighted mean of trigonometric and photometric distancemeta.notecharSimbadNameSimbad column added by the CDSmeta.idchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainJ/AJ/135/1225/table4Possible white dwarfs within 20pcrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWDWD designation (HHMM+DDM, B1950) (1)meta.id;meta.maincharONameOther namemeta.idcharSpTypeSpectral typesrc.spTypecharr.tr? Trigonometric distancepcpos.distance;pos.parallax.trig;pos.heliocentricfloatnullablee_r.tr? r.tr uncertaintypcstat.errorfloatnullabler.phPhotometric distancepcpos.distancefloate_r.ph? r.ph uncertaintypcstat.errorfloatnullableRefreference(s) number; see refs.dat filemeta.idcharVmag? Visual magnitudemagphot.mag;em.opt.Vfloatnullableu_VmagUncertainty flag on Vmagmeta.code.errorcharNotes[a-c, ] Note(s) (2)meta.notecharSimbadNameSimbad column added by the CDSmeta.idchar_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/AJ/135/1225/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.mainintprimaryBibCodeBibcodemeta.bib.bibcodecharAutAuthor's name(s)meta.bib.authorcharComCommentsmeta.notechar