Spectroscopy of DA WD from the SDSS-DR4 J/ApJ/730/128 ivo://CDS.VizieR/J/ApJ/730/128 doi:10.26093/cds/vizier.17300128 CDS Tremblay P.-E. Bergeron P. Gianninas A. 2017-10-11T05:13:24Z 2012-11-13T15:14:18Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr effective-temperature white-dwarf-stars chemical-abundances stellar-masses We present an improved spectroscopic and photometric analysis of hydrogen-line DA white dwarfs from the Sloan Digital Sky Survey Data Release 4 (SDSS DR4) based on model atmospheres that include improved Stark broadening profiles with non-ideal gas effects. We also perform a careful visual inspection of all spectroscopic fits with high signal-to-noise ratios (S/Ns>12) and present improved atmospheric parameters (T_eff_ and logg) for each white dwarf. Through a comparison of spectroscopic and photometric temperatures, we report the discovery of 35 DA+DB/DC double degenerate candidates and two helium-rich DA stars. We also determine that a cutoff at S/N=15 optimizes the size and quality of the sample for computing the mean mass of DA white dwarfs, for which we report a value of 0.613M_{sun}_. We compare our results to previous analyses of the SDSS DR4 and find a good agreement if we account for the shift produced by the improved Stark profiles. Finally, the properties of DA white dwarfs in the SDSS are weighed against those of the Villanova White Dwarf Catalog sample of Gianninas et al. (2009JPhCS.172a2021G). 2011ApJ...730..128T https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/730/128 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to J/MNRAS/417/1210 : DA-white dwarfs from SDSS and UKIDSS (Girven+, 2011) J/ApJS/190/77 : Detailed analysis of cool WDs in the SDSS (Kilic+, 2010) J/ApJ/714/1037 : White dwarfs from the Kiso survey (Limoges+, 2010) J/AJ/135/1239 : Spectral distances to DA white dwarfs (Holberg+, 2008) J/A+A/466/627 : Parameters of DA white dwarfs in SDSS-DR1 (Hu+, 2007) J/AJ/134/741 : Close binary systems from the SDSS DR5 (Silvestri+, 2007) J/MNRAS/382/515 : SDSS ultracool and halo WD candidates (Vidrih+, 2007) J/AJ/132/1221 : VJHK and SDSS photometry of DA WDs (Holberg+, 2006) J/AJ/131/582 : Cool white dwarfs in the SDSS (Kilic+, 2006) J/AJ/131/1674 : Close binary systems from SDSS DR4 (Silvestri+, 2006) J/AJ/132/676 : SDSS hot DB white dwarfs (Eisenstein+, 2006) J/ApJS/167/40 : SDSS4 confirmed white dwarfs catalog (Eisenstein+, 2006) J/ApJ/607/426 : Catalog of white dwarfs in SDSS-DR1 (Kleinman+, 2004) J/AJ/126/1023 : White Dwarfs in the SDSS (Harris+, 2003) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/730/128 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/730/128 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/730/128 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/730/128 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/730/128 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/730/128 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJ/730/128/table1 (SDSS DR4 sample of DA white dwarfs with S/N>12) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/730/128/table1? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/730/128/table1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/730/128/table1? GET text/xml+votable 180.0 50000 true 0.028125 -0.7816111 0.005555555555555556 Cone search capability for table J/ApJ/730/128/table3 (DA+DB/DC binary candidates) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/730/128/table3? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/730/128/table3? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/730/128/table3? GET text/xml+votable 180.0 50000 true 5.8435 15.0032222 0.005555555555555556 Cone search capability for table J/ApJ/730/128/table5 (SDSS DR4 sample of DAO white dwarfs with S/N>12) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/730/128/table5? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/730/128/table5? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/730/128/table5? GET text/xml+votable 180.0 50000 true 57.1305417 0.7711944 0.005555555555555556 5/1027 1058 1089 1250 1277 1404 1585 1616 1639 1641 1651 1657 1814 1844 1863 2307 2329 2463 2547 2814 2830 2899 2987 4521 4697 4710 6490 6822 6832 6833 6861 6/1 2 523 544 545 547 548 549 2602 2679 4096 4097 4098 4100 4101 4103 4104 4112 4113 4116 4117 4120 4122 4123 4126 4128 4129 4134 4135 4136 4138 4139 4140 4141 4142 4145 4147 4149 4150 4151 4152 4154 4155 4157 4158 4159 4160 4161 4162 4164 4165 4171 4174 4175 4176 4178 4179 4180 4183 4185 4188 4193 4194 4196 4197 4198 4200 4202 4204 4205 4206 4210 4211 4227 4229 4236 4238 4241 4242 4243 4246 4249 4257 4258 4260 4288 4352 4353 4355 4361 4762 4767 4775 4785 4786 4788 4789 4790 4792 4795 4797 4811 4815 4824 4825 4828 4829 4830 4833 4836 4837 4838 4840 4841 4842 4845 4849 4850 4851 4852 4854 4855 4863 4970 4979 4983 4984 4986 4987 4991 4995 4998 5010 5011 5013 5014 5016 5018 5019 5027 5028 5029 5030 5032 5034 5035 5037 5038 5039 5040 5044 5046 5047 5048 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meta.note int recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int SDSS SDSS name (JHHMMSS.ss+DDMMSS.s) (1) meta.id;meta.main char Teff Effective temperature K phys.temperature.effective int e_Teff ? Uncertainty in Teff K stat.error;phys.temperature.effective int nullable log(g) Log of the surface gravity log(cm.s**-2) phys.gravity float e_log(g) ? Uncertainty in log(g) log(cm.s**-2) stat.error float nullable Mass ? Mass solMass phys.mass float nullable e_Mass ? Uncertainty in Mass solMass stat.error;phys.mass float nullable VMag ? Absolute V band magnitude mag phys.magAbs;em.opt.V float nullable logtau ? Log of white dwarf cooling time log(yr) time.age float nullable DR4+ Display the data from SDSS-DR4, -DR7 and -DR8 within 3" meta.ref.url char Sloan Display the SDSS online spectrum for this white dwarf meta.ref.url char _RA Positions from SDSS name (right ascension part) deg pos.eq.ra;meta.main _DE Positions from SDSS name (declination part) deg pos.eq.dec;meta.main
J/ApJ/730/128/table3 DA+DB/DC binary candidates recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int SDSS SDSS name (JHHMMSS.ss+DDMMSS.s) meta.id;meta.main char Plate SDSS plate meta.note int MJD SDSS MJD d time.epoch int Fib SDSS fiber meta.note int Teff Effective temperature; H-comp K phys.temperature.effective int e_Teff Teff uncertainty K stat.error;phys.temperature.effective int logg Log of the surface gravity; H-comp log(cm.s**-2) phys.gravity float e_logg ? logg uncertainty log(cm.s**-2) stat.error float nullable TeffHe Effective temperature; He-comp K phys.temperature.effective int e_TeffHe TeffHe uncertainty K stat.error int loggHe Log of the surface gravity; He-comp log(cm.s**-2) phys.gravity float e_loggHe ? loggHe uncertainty log(cm.s**-2) stat.error float nullable Notes Additional note(s) (1) meta.note char DR4+ Display the data from SDSS-DR4, -DR7 and -DR8 within 3" meta.ref.url char Sloan Display the SDSS online spectrum for this white dwarf meta.ref.url char Simbad Simbad column added by the CDS meta.ref char _RA Positions from SDSS name (right ascension part) deg pos.eq.ra;meta.main _DE Positions from SDSS name (declination part) deg pos.eq.dec;meta.main
J/ApJ/730/128/table5 SDSS DR4 sample of DAO white dwarfs with S/N>12 VMag Absolute V-band magnitude mag phot.mag;em.opt.V float recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int SDSS SDSS name (JHHMMSS.ss+DDMMSS.s) meta.id;meta.main char f_SDSS [a] a: Observational glitch meta.code char Plate SDSS plate meta.note int MJD SDSS MJD d time.epoch int Fib SDSS fiber meta.note int Teff Effective temperature K phys.temperature.effective int e_Teff Teff uncertainty K stat.error;phys.temperature.effective int logg Log of the surface gravity log(cm.s**-2) phys.gravity float e_logg logg uncertainty log(cm.s**-2) stat.error float logHe/H Log of Helium abundance phys.abund.Y float e_logHe/H logHe/H uncertainty stat.error;phys.abund.Y float Mass Mass solMass phys.mass float e_Mass Mass uncertainty solMass stat.error;phys.mass float logtau Log of white dwarf cooling time time.age float DR4+ Display the data from SDSS-DR4, -DR7 and -DR8 within 3" meta.ref.url char Sloan Display the SDSS online spectrum for this white dwarf meta.ref.url char Simbad Simbad column added by the CDS meta.ref char _RA Positions from SDSS name (right ascension part) deg pos.eq.ra;meta.main _DE Positions from SDSS name (declination part) deg pos.eq.dec;meta.main