1340 Helium rich white dwarfs in the Gaia era J/ApJ/885/74 ivo://CDS.VizieR/J/ApJ/885/74 doi:10.26093/cds/vizier.18850074 CDS Coutu S. Dufour P. Bergeron P. Blouin S. Loranger E. Allard N.F.,Dunlap B.H. 2022-09-30T21:38:18Z 2021-06-21T09:07:54Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr white-dwarf-stars chemical-abundances stellar-spectral-types stellar-masses effective-temperature infrared-photometry visible-astronomy broad-band-photometry We present an analysis of 1023 DBZ/DZ(A) and 319 DQ white dwarf stars taken from the Montreal White Dwarf Database. This represents a significant increase over the previous comprehensive studies on these types of objects. We use new trigonometric parallax measurements from the Gaia second data release, together with photometry from the Sloan Digital Sky Survey, Pan-STARRS, Gaia, or BVRI from the literature, which allow the determination of the mass for the majority of the objects in our sample. We use the photometric and spectroscopic techniques with our recently improved model atmospheres code, which include high-density effects, to accurately determine the effective temperature, surface gravity, and heavy-element abundances for each object. We study the abundance of hydrogen in DBZ/DZ white dwarfs and the properties of the accreted planetesimals. We explore the nature of the second sequence of DQ stars using proper motions from Gaia and highlight evidence of crystallization in massive DQ stars. We also present mass distributions for both spectral types. Finally, we discuss the implications of our findings in the context of the spectral evolution of white dwarfs and provide the atmospheric parameters for each star. 2019ApJ...885...74C https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/885/74 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to B/simbad : Simbad objects catalogue (M.Wenger 2000) I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007) I/337 : Gaia DR1 (Gaia Collaboration, 2016) II/345 : Gaia DR2 (Gaia Collaboration, 2018) J/ApJS/133/413 : BVRIJHK photometry of cool white dwarfs (Bergeron+, 2001) J/ApJS/147/145 : IUE low-dispersion spectra of white dwarfs (Holberg+, 2003) J/ApJ/607/426 : Catalog of white dwarfs in SDSS-DR1 (Kleinman+, 2004) J/AJ/132/676 : SDSS hot DB white dwarfs (Eisenstein+, 2006) J/AJ/132/1221 : VJHK and SDSS photometry of DA white dwarfs (Holberg+, 2006) J/ApJ/663/1291 : DZ stars in SDSS DR4 (Dufour+, 2007) J/AJ/134/252 : New nearby white dwarf systems (Subasavage+, 2007) J/A+A/470/1079 : UVES/VLT spectra of white dwarfs (Voss+, 2007) J/ApJ/765/12 : Carbon stars & DQ white dwarfs from SDSSDR7+DR8 (Green,2013) J/ApJS/204/5 : SDSS DR7 white dwarf catalog (Kleinman+, 2013) J/AJ/145/136 : Astrometry & photometry nearby white dwarfs (Limoges+, 2013) J/MNRAS/446/4078 : New white dwarf stars in SDSS DR10 (Kepler+, 2015) J/ApJS/219/19 : Census nearby white dwarfs from SUPERBLINK (Limoges+, 2015) J/MNRAS/455/3413 : New white dwarf & subdwarf stars in SDSS DR12 (Kepler+,2016) J/MNRAS/467/4970 : Cool DZ white dwarfs. I. (Hollands+, 2017) J/A+A/616/A10 : 46 open clusters GaiaDR2 HRdiagrams (Gaia Collaboration,2018) J/ApJS/239/26 : NOFS astrometric measurements distant WDs (Leggett+, 2018) J/ApJ/878/63 : Cool WD atmosphere models.IV. Spectral evol. (Blouin+, 2019) J/MNRAS/482/4570 : Gaia DR2 white dwarf candidates (Gentile Fusillo+, 2019) J/A+A/628/A102 : Carbon-rich (DQ) white dwarfs in SDSS (Koester+, 2019) http://www.montrealwhitedwarfdatabase.org/ : Montreal White Dwarf Database https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/885/74 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/885/74 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/885/74 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/885/74 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/885/74 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/885/74 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJ/885/74/table1 (Object names, spectral types, and coordinates) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/885/74/table1? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/885/74/table1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/885/74/table1? 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40623 40747 40957 43873 46406 46841 48890 49077 49098 49149 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/885/74?format=ascii Optical Infrared default J/ApJ/885/74/table1 Object names, spectral types, and coordinates SimbadName Simbad column added by the CDS meta.id char recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int Name Object name meta.id;meta.main char primary Gaia ? Gaia DR2 Source identifier meta.id.cross nullable MWDD Montreal White Dwarf Database identifier meta.id.cross char SpT Spectral Type src.spType char RAJ2000 [0.04/360] Right Ascension (J2000) deg pos.eq.ra;meta.main DEJ2000 [-64.9/78.4] Declination (J2000) deg pos.eq.dec;meta.main DZ If >0, indicate that the star is a DZ star (table4) meta.number int nullable DQ If >0, indicate that the star is a DQ star (table5) meta.number int nullable
J/ApJ/885/74/table4 Atmospheric parameters for DZ stars recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int Name Object name meta.id;meta.main char Teff [4132/15794] Effective temperature K phys.temperature.effective int e_Teff [28/6173] Error in Teff K stat.error;phys.temperature.effective int logg [7.08/8.95] Log of the surface gravity log(cm.s**-2) phys.gravity float e_logg [0.02/1.6]? Lower error in logg log(cm.s**-2) stat.error float nullable E_logg [0.02/2.49]? Higher error in logg log(cm.s**-2) stat.error;stat.max float nullable Mass [0.21/1.16]? Mass solMass phys.mass float nullable e_Mass [0.02/0.47]? Lower error in Mass solMass stat.error;phys.mass float nullable E_Mass [0.02/1.18]? Higher error in Mass solMass stat.error;stat.max float nullable [H/He] [-30/-3] Log of the H/He ratio phys.abund float e_[H/He] [0/1.83]? Error in logH/He stat.error;phys.abund float nullable Dist [4.3/818.8] Distance of the object pc pos.distance float e_Dist [0/633.9] Error in Dis pc stat.error float f_[H/He] Flag on logH/He (1) meta.code char f_Dist Flag on Dist (2) meta.code char
J/ApJ/885/74/table5 Atmospheric parameters for DQ stars recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int Name Object name meta.id;meta.main char Teff [6004/15167] Effective temperature K phys.temperature.effective int e_Teff [33/1164] Error in Teff K stat.error;phys.temperature.effective int logg [7.01/8.97] Log of the surface gravity log(cm.s**-2) phys.gravity float e_logg [0.02/0.62]? Lower error in logg log(cm.s**-2) stat.error float nullable E_logg [0.02/0.89]? Higher error in logg log(cm.s**-2) stat.error;stat.max float nullable Mass [0.18/1.17]? Mass solMass phys.mass float nullable e_Mass [0.01/0.25]? Lower error in Mass solMass stat.error;phys.mass float nullable E_Mass [0.01/0.51]? Higher error in Mass solMass stat.error;stat.max float nullable [C/He] [-7.29/-1.14] Log of the C/He ratio phys.abund float e_[C/He] [0.01/0.77]? Error in [C/He] stat.error;phys.abund float nullable [H/He] [-3/-3]? Log of the H/He ratio phys.abund float nullable Dist [3.5/511.5] Distance pc pos.distance float e_Dist [0/166] Uncertainty in Dist pc stat.error float f_[H/He] Flag on [H/He] (1) meta.code char f_Dist Flag on Dist (2) meta.code char