J/AJ/128/1825ivo://CDS.VizieR/J/AJ/128/1825doi:10.26093/cds/vizier.51281825CDSKilic M.Winget D.E.von Hippel T.Claver C.F.2017-12-15T10:55:54Z2005-07-01T23:04:02ZCDS support team

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

cds-question@unistra.frinfrared-photometryvisible-astronomybroad-band-photometrywhite-dwarf-starsWe investigate the use of a narrowband DDO51 filter for photometric identification of cool white dwarfs. We report photometric observations of 30 known cool white dwarfs with temperatures ranging from 10,000K down to very cool temperatures (<=3500K). Follow-up spectroscopic observations of a sample of objects selected using this filter and our photometric observations show that DDO51 filter photometry can help select cool white dwarf candidates for follow-up multiobject spectroscopy by rejecting 65% of main-sequence stars with the same broadband colors as the cool white dwarfs. This technique is not selective enough to efficiently feed single-object spectrographs. We present the white dwarf cooling sequence using this filter. Our observations show that very cool white dwarfs form a sequence in the r-DDO versus r-z color-color diagram and demonstrate that significant improvements are needed in white dwarf model atmospheres.2004AJ....128.1825Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/128/1825CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/70 : Luyten's White Dwarf Catalogues (Luyten, 1970-77)III/235 : Spectroscopically Identified White Dwarfs (McCook+, 2003)J/AJ/126/1023 : White Dwarfs in the SDSS (Harris+, 2003)J/ApJ/607/426 : Catalog of white dwarfs in SDSS-DR1 (Kleinman+, 2004)J/ApJS/133/413 : BVRIJHK photometry of cool white dwarfs (Bergeron+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/128/1825https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/128/1825http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/128/1825https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/128/1825https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/128/1825http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/128/1825GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/128/1825/table1 (Objects with SDSS Spectroscopy)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/128/1825/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/128/1825/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/128/1825/table1?GETtext/xml+votable180.050000true154.45375-0.52347220.005555555555555556Cone search capability for table J/AJ/128/1825/table2 (Objects with HET+McDonald 2.7Meter Spectroscopy)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/128/1825/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/128/1825/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/128/1825/table2?GETtext/xml+votable180.050000true175.455875-0.19455560.005555555555555556Cone search capability for table J/AJ/128/1825/table3 (DDO51 Photometry for Previously Identified White Dwarfs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/128/1825/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/128/1825/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/128/1825/table3?GETtext/xml+votable180.050000true351.52741716.0054170.0055555555555555566/2644 8894 10169 10370 11127 11159 11587 13391 15335 17094 17932 18556 18701 19999 20371 20573 25949 25956 26025 26195 26258 26259 26264 26274 26321 26386 26968 26970 26982 26983 27038 27219 28354 29777 35571 36014 37473 38665 38788 38860 40117 40164 485442.040811542443644e-19 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/128/1825?format=asciiOpticalInfrareddefaultJ/AJ/128/1825/table1Objects with SDSS SpectroscopyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS designation (JHHMMSS.ss+DDMMSS.s)charPlatePlateintDateJulian date of observationdintFiberFiberintDDOmagMagnesium absorption line centered filter DDO51magfloatumagu SDSS magnitudemagfloatgmagg SDSS magnitudemagfloatrmagr SDSS magnitudemagfloatimagi SDSS magnitudemagfloatzmagz SDSS magnitudemagfloate_DDOmagError in DDOmagmagfloate_umagError in umagmagfloate_gmagError in gmagmagfloate_rmagError in rmagmagfloate_imagError in imagmagfloate_zmagError in zmagmagfloatTypeObject typecharSimbadSimbad column added by the CDSchar_RAPosition (derived from SDSS name) (right ascension part)degpos.eq.ra;meta.main_DEPosition (derived from SDSS name) (declination part)degpos.eq.dec;meta.mainJ/AJ/128/1825/table2Objects with HET+McDonald 2.7Meter SpectroscopyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numberintSDSSSDSS designation (JHHMMSS.ss+DDMMSS.s)charDDOmagMagnesium absorption line centered filter DDO51magfloatumagu SDSS magnitudemagfloatgmagg SDSS magnitudemagfloatrmagr SDSS magnitudemagfloatimagi SDSS magnitudemagfloatzmagz SDSS magnitudemagfloate_DDOmagError in DDOmagmagfloate_umagError in umagmagfloate_gmagError in gmagmagfloate_rmagError in rmagmagfloate_imagError in imagmagfloate_zmagError in zmagmagfloatSimbadSimbad column added by the CDSchar_RAPosition (derived from SDSS name) (right ascension part)degpos.eq.ra;meta.main_DEPosition (derived from SDSS name) (declination part)degpos.eq.dec;meta.mainJ/AJ/128/1825/table3DDO51 Photometry for Previously Identified White DwarfsNameObject namecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRmagCousins R magnitudemagfloatr-zSDSS r-z colour indexmagfloate_r-zError in r-zmagfloatr-DDOr-DDO51 colour indexmagfloate_r-DDOError in r-DDOmagfloatTeff? Effective temperatureKintnullablef_Teff[:] Flag on TeffcharNoteIndividual Note (1)intSimbadSimbad 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.main