J/MNRAS/467/4970ivo://CDS.VizieR/J/MNRAS/467/4970doi:10.26093/cds/vizier.74674970CDSHollands M.A.Koester D.Alekseev V.Herbert E.L.Gansicke B.T.2024-08-17T20:18:22Z2019-12-16T10:20:34ZCDS support team

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

cds-question@unistra.frwhite-dwarf-starsvisible-astronomysloan-photometrychemical-abundancesWhite dwarfs with metal lines in their spectra act as signposts for post-main-sequence planetary systems. Searching the Sloan Digital Sky Survey (SDSS) Data Release 12, we have identified 231 cool (<9000K) DZ white dwarfs with strong metal absorption, extending the DZ cooling sequence to both higher metal abundances and lower temperatures, and hence longer cooling ages. Of these 231 systems, 104 are previously unknown white dwarfs. Compared with previous work, our spectral fitting uses improved model atmospheres with updated line profiles and line-lists, which we use to derive effective temperatures and abundances for up to eight elements. We also determine spectroscopic distances to our sample, identifying two halo members with tangential space velocities >300km/s. The implications of our results on remnant planetary systems are to be discussed in a separate paper.2017MNRAS.467.4970Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/467/4970CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/467/4970https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/467/4970http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/467/4970https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/467/4970https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/467/4970http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/467/4970GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/467/4970/table3 (SDSS PSF photometry for all white dwarfs in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/467/4970/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/467/4970/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/467/4970/table3?GETtext/xml+votable180.050000true0.565166732.15391670.0055555555555555566/645 670 678 2098 2179 2222 2280 4156 4202 4292 4328 4331 4333 4428 4445 4476 4545 4621 4733 4746 4791 4813 4887 4895 4977 5089 5104 5139 5155 5202 5236 5266 5290 5331 5334 5347 5350 5500 5503 5505 5529 5598 5620 5780 5787 5798 5801 5809 5871 5917 5920 5973-5974 6015 6103 6148 6218 6237 6254-6255 6395 6500 6548 6568 6584 6591 6640 7223 7232 7250 7327 7457 7510 7533 7561 8213 8345 8350 8480 8526 8544 8552 8640 8692 8749 8808 8865 8938 8941 8958 8973 9115 9201 9386 9397 9417 9419 9448 9639 9767 9805 9869 9878 9890 9953 10019 10271 10307 10413 10426 10432 10457 10476 10510 10540 10542 10570 10616 10777 10820 10852 11048 11147 11345 11353 11488 11919 12316 13348 13402 17372 17497 17599 17685 17700 17757 17806 17819 17837 17851 17956 18012 18127 18303 18375 18776 18801 18850 18856 18905 19107 19120 19205 19263 19386 19455 19483 19517 19565 19597 19617 19634 19766 19806 19816 19897 19932 19958 20054 20195 20238 20363 20390 20395 20419 20427 21789 21982 22363 22821 23416 25850 25931 26038 26143 26207 26236 26250 26279 26365 26482 26490 26544 26572 26580 27048 27061 27082 27129 27236 27417 27543 27597 27604 27645 27685 27692 27719 27749 27769 27829 27885 27903 27993 28106 28226 28412 28435 28493 28504 28510 28603 28632 28654 31732 32419 32441 32493 368452.040811542443644e-19 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/467/4970?format=asciiOpticaldefaultJ/MNRAS/467/4970/table3SDSS PSF photometry for all white dwarfs in our samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS name (HHMMSS.ss+DDMMSS.s)meta.id;meta.maincharPMFSDSS Plate-MJD-Fibermeta.idcharNsdssNumber of SDSS spectra available per objectmeta.numberintumagSDSS u magnitudemagphot.mag;em.opt.Ufloate_umagrms uncertainty on umagmagstat.error;phot.mag;em.opt.UfloatgmagSDSS g magnitudemagphot.mag;em.opt.Bfloate_gmagrms uncertainty on gmagmagstat.error;phot.mag;em.opt.BfloatrmagSDSS r magnitudemagphot.mag;em.opt.Rfloate_rmagrms uncertainty on rmagmagstat.error;phot.mag;em.opt.RfloatimagSDSS i magnitudemagphot.mag;em.opt.Ifloate_imagrms uncertainty on imagmagstat.error;phot.mag;em.opt.IfloatzmagSDSS z magnitudemagphot.mag;em.opt.Ifloate_zmagrms uncertainty on zmagmagstat.error;phot.mag;em.opt.IfloatNote[*] * for the source not in other tablesmeta.notecharSNameSDSS short name (HHMM+DDMM)meta.idcharSpInteractive spectrum from SDSS-DR12meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from SDSS name (declination part)degpos.eq.dec;meta.mainJ/MNRAS/467/4970/table6Derived parameters from atmospheric modelling of the SDSS and WHT spectra[Cr/He]? Abundance [Cr/He]phys.abundfloatnullable[Na/He]? Abundance [Na/He]phys.abundfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNameSDSS short name (HHMM+DDMM)meta.idcharTeffEffective temperatureKphys.temperature.effectiveinte_Teffrms uncertainty on TeffKstat.error;phys.temperature.effectiveint[Ca/He]Abundance [Ca/He]phys.abundfloat[Mg/He]Abundance [Mg/He]phys.abundfloat[Fe/He]Abundance [Fe/He]phys.abundfloat[Ti/He]? Abundance [Ti/He]phys.abundfloatnullable[Ni/He]? Abundance [Ni/He]phys.abundfloatnullablel_[H/He][<= ] Limit flag on [H/He]phys.abundchar[H/He]? Abundance [H/He]phys.abundfloatnullableJ/MNRAS/467/4970/table7The mass fraction of the convection zone, q, and logarithm of the diffusion time-scale in years for each elementrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNameSDSS short name (HHMM+DDMM)meta.idcharlogqMass fraction of the convection zonephys.mass;obs.fieldfloattCalogarithm of the diffusion time-scale for Calog(yr)time.intervalfloattMglogarithm of the diffusion time-scale for Mglog(yr)time.intervalfloattFelogarithm of the diffusion time-scale for Felog(yr)time.intervalfloattNalogarithm of the diffusion time-scale for Nalog(yr)time.intervalfloattCrlogarithm of the diffusion time-scale for Crlog(yr)time.intervalfloattTilogarithm of the diffusion time-scale for Tilog(yr)time.intervalfloattNilogarithm of the diffusion time-scale for Nilog(yr)time.intervalfloatJ/MNRAS/467/4970/table8Distances, proper motions, transverse motions and white dwarf cooling ages for our DZ samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNameSDSS short name (HHMM+DDMM)meta.idcharDistDistancepcpos.distancefloate_Distrms uncertainty on Distpcstat.errorfloatpm? Total proper motionmas/yrpos.pmfloatnullablee_pm? rms uncertainty on pmmas/yrstat.errorfloatnullablevperp? Perpendicular velocitykm/sphys.velocfloatnullablee_vperp? rms uncertainty on vperpkm/sstat.errorfloatnullabletauAgeGyrtime.agefloatE_tauError on tau (upper value)Gyrstat.error;stat.maxfloate_tauError on tau (lower value)Gyrstat.errorfloat