J/MNRAS/497/130ivo://CDS.VizieR/J/MNRAS/497/130doi:10.26093/cds/vizier.74970130CDSTremblay P.-E.Hollands M.A.Gentile Fusillo N.P.McCleery J.,Izquierdo P.Gansicke B.T.Cukanovaite E.Koester D.Brown W.R.,Charpinet S.Cunningham T.Farihi J.Giammichele N.Van Grootel V.,Hermes J.J.Hoskin M.J.Jordan S.Kepler S.O.Kleinman S.J.,Manser C.J.Marsh T.R.De Martino D.Nitta A.Parsons S.G.,Pelisoli I.Raddi R.Rebassa-Mansergas A.Ren J.-J.Schreiber M.R.,Silvotti R.Toloza O.Toonen S.Torres S.2024-08-21T20:15:35Z2021-02-09T13:44:12ZCDS support team

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

cds-question@unistra.frwhite-dwarf-starsspectroscopyvisible-astronomyWe present a spectroscopic survey of 230 white dwarf candidates within 40pc of the Sun from the William Herschel Telescope and Gran Telescopio Canarias. All candidates were selected from Gaia Data Release 2 (DR2) and in almost all cases, had no prior spectroscopic classifications. We find a total of 191 confirmed white dwarfs and 39 main-sequence star contaminants. The majority of stellar remnants in the sample are relatively cool (<Teff>=6200K), showing either hydrogen Balmer lines or a featureless spectrum, corresponding to 89 DA and 76 DC white dwarfs, respectively. We also recover two DBA white dwarfs and 9-10 magnetic remnants. We find two carbon-bearing DQ stars and 14 new metal-rich white dwarfs. This includes the possible detection of the first ultra-cool white dwarf with metal lines. We describe three DZ stars for which we find at least four different metal species, including one that is strongly Fe- and Ni-rich, indicative of the accretion of a planetesimal with core-Earth composition. We find one extremely massive (1.31+/-0.01M_{sun}_) DA white dwarf showing weak Balmer lines, possibly indicating stellar magnetism. Another white dwarf shows strong Balmer line emission but no infrared excess, suggesting a low-mass sub-stellar companion. A high spectroscopic completeness (>99 per cent) has now been reached for Gaia DR2 sources within 40-pc sample, in the Northern hemisphere ({delta}>0{deg} and located on the white dwarf cooling track in the Hertzsprung-Russell diagram. A statistical study of the full northern sample is presented in a companion paper (McCleery et al., Paper II, 2020MNRAS.499.1890M, Cat. J/MNRAS/499/1890).2020MNRAS.497..130Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/497/130CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/219/19 : Nearby white dwarfs from SUPERBLINK (Limoges+, 2015)J/MNRAS/482/4570 : Gaia DR2 white dwarf candidates (Gentile Fusillo+, 2019)J/MNRAS/499/1890 : Gaia white dwarfs within 40pc. II. (McCleery+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/497/130https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/497/130http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/497/130https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/497/130https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/497/130http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/497/130GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/497/130/table2 (Spectral types and parameters of the white dwarf sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/497/130/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/497/130/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/497/130/table2?GETtext/xml+votable180.050000true3.35187554.63267780.0055555555555555566/49 145 279 378 385 448 558 609 747 932 1016 1355 1388 1400 1703 1735 2349 2527 2820 2890 2988 3125 3236 3263 3344 3422 3762 3916 4800 6107 6274 6289 6821 6969 6991 7070 7160 7383 7390 7404 7579 7684 7926 7939 8102 8145 9112 9583 9846 11703 11960 11982 12237 12771 13324 13450 13503 13708 13712 13758 14050 14135 14255 14344 14388 14667 14670 14735 14768 15053 15117 15222 15252 15271 15418 15527 15627 15651 15670 15692 15978 16032 16249 17653 17881 17940 17986 18058 18146 18250 18348 18971 19018 19067 19118 19419 19521 20029 20053 20288 21396 21543 21739 21840 21891 22053 22113 22237 22431 22458 22520 22729 22802-22803 23088 23637 23779 23802 24037 25085 25407 25461 25473 26650 26881 27157 28908 29093 29321 29411 29463 29487 29515-29516 29700 29951 30058 30109 30128 30212 30248 30327 30474 30509 30659 30723 30848 30850 30905 30945 30977 31120 31860 31862 31915 31951 32006 32176 32253 32278 32493 32578 32607 32617 32676 32715 32764 36716 36819 40159 40420 40571 40879 40898 43901 44380 44410 44555 44840 48632 48697 48785 48843 48852 49118https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/497/130?format=asciiOpticaldefaultJ/MNRAS/497/130/table2Spectral types and parameters of the white dwarf sampleNoteNote (4)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_WDJ[*] Note on WJD (1)meta.notecharWDJWDJ name, HHMMSS.ss+DDMMSS.s (J2000)meta.id;meta.maincharSpTypeSpectral type (2)src.spTypecharTeff3D? 3D spectro effective temperatureKphys.temperature.effectiveintnullablee_Teff3D? 3D spectro effective temperature error (3)Kstat.errorintnullablelogg3D? 3D spectro surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_logg3D? 3D spectro surface gravity error (3)log(cm.s**-2)stat.errorfloatnullableTeffG? Gaia DR2 effective temperatureKphys.temperature.effectiveintnullablee_TeffG? Gaia DR2 effective temperature error (3)Kstat.errorintnullableloggG? Gaia DR2 surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_loggG? Gaia DR2 surface gravity error (3)log(cm.s**-2)stat.errorfloatnullableTeffP? Pan-STARRS effective temperatureKphys.temperature.effectiveintnullablee_TeffP? Pan-STARRS effective temperature error (3)Kstat.errorintnullableloggP? Pan-STARRS surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_loggP? Pan-STARRS surface gravity error (3)log(cm.s**-2)stat.errorfloatnullable_RAPosition from name (right ascension part)degpos.eq.ra;meta.main_DEPosition from name (declination part)degpos.eq.dec;meta.main