J/ApJ/794/35ivo://CDS.VizieR/J/ApJ/794/35doi:10.26093/cds/vizier.17940035CDSGianninas A.Dufour P.Kilic M.Brown W.R.Bergeron P.Hermes J.J.2017-07-03T13:22:50Z2017-05-12T16:00:53ZCDS support team

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

cds-question@unistra.frmultiple-starswhite-dwarf-starsstellar-masseseffective-temperaturestellar-radiivisible-astronomysloan-photometrystellar-distanceWe present a detailed spectroscopic analysis of 61 low-mass white dwarfs and provide precise atmospheric parameters, masses, and updated binary system parameters based on our new model atmosphere grids and the most recent evolutionary model calculations. For the first time, we measure systematic abundances of He, Ca, and Mg for metal-rich, extremely low mass white dwarfs and examine the distribution of these abundances as a function of effective temperature and mass. Based on our preliminary results, we discuss the possibility that shell flashes may be responsible for the presence of the observed He and metals. We compare stellar radii derived from our spectroscopic analysis to model-independent measurements and find good agreement except for white dwarfs with T_eff_<~10000 K. We also calculate the expected gravitational wave strain for each system and discuss their significance to the eLISA space-borne gravitational wave observatory. Finally, we provide an update on the instability strip of extremely low mass white dwarf pulsators.2014ApJ...794...35Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/794/35CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/129/2428 : M dwarf-white dwarf binary systems (Silvestri+, 2005)J/AJ/134/26 : Binaries with white dwarf in 2MASS (Hoard+, 2007)J/A+A/486/843 : White dwarf-red dwarf binaries in the SDSS (Augusteijn+, 2008)J/ApJ/769/66 : The ELM survey. V. White dwarf binaries (Brown+, 2013)J/ApJ/818/155 : The ELM survey. VII. 15 new ELM white dwarf cand.https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/794/35https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/794/35http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/794/35https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/794/35https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/794/35http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/794/35GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/794/35/sample (ELM WD Physical Parameters (table 1) and Binary Parameters (table 2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/794/35/sample?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/794/35/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/794/35/sample?GETtext/xml+votable180.050000true5.61854170.5210.0055555555555555566/316 4102 4134 4613 4673 4676 4774 4813 4855 4976 5446 5653 5948 6015 6306 6426 6633 6636 7185 7524 8265 8346 8419 8427 8537 8991 9270 9376 9447 9984 10606 11393 11604 12368 13319 13552 16033 16973 17231 17551 17936 18096 18252 18770 18831 19109 19114 19800 21587 21900 21961 22518 26170 27019 27475 27522 27698 27951 28054 28162 31435https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/794/35?format=asciiOpticaldefaultJ/ApJ/794/35/sampleELM WD Physical Parameters (table 1) and Binary Parameters (table 2)SimbadNameSimbad column added by the CDSmeta.idcharKVelocity semi-amplitudekm/sphys.velocfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS identifier (JHHMM+DDMM), EQ JHHMM+DDMM in Simbadmeta.id;meta.maincharf_SDSS[bc] Flag on SDSS (1)meta.codecharTeffEffective temperatureKphys.temperature.effectiveinte_TeffUncertainty in TeffKstat.error;phys.temperature.effectiveintlog(g)Log surface gravitylog(cm.s**-2)phys.gravityfloate_log(g)Uncertainty in log(g)log(cm.s**-2)stat.errorfloatMassMass (2)solMassphys.massfloatRadRadiussolRadphys.size.radiusfloate_RadUncertainty in RadsolRadstat.errorfloatgmagSDSS g band magnitude; extinction correctedmagphot.mag;em.opt.Bfloate_gmagUncertainty in gmagmagstat.error;phot.mag;em.opt.BfloatgMagAbsolute SDSS g band magnitudemagphys.magAbs;em.opt.Bfloate_gMagUncertainty in gMagmagstat.error;phot.magfloatDistDistancekpcpos.distance;pos.heliocentricfloate_DistUncertainty in Distkpcstat.errorfloattaucCooling timescaleGyrtime.scalefloate_taucUncertainty in taucGyrstat.errorfloatP? Perioddtime.perioddoublenullablee_P? Uncertainty in Pdstat.errordoublenullablel_K[<= ] Limit flag on Kmeta.code.errorchare_K? Uncertainty in Kkm/sstat.errorfloatnullableMF? Mass FunctionsolMassphys.massfloatnullablee_MF? Uncertainty in MFsolMassstat.errorfloatnullablel_M2[>= ] Limit flag on M2meta.code.errorcharM2? Secondary masssolMassphys.massfloatnullablee_M2? Uncertainty in M2solMassstat.errorfloatnullableM2-60? Secondary mass assuming inclination=60solMassphys.massfloatnullablee_M2-60? Uncertainty in M2-60solMassstat.errorfloatnullablef_M2-60[a] Flag on M2-60 (1)meta.codecharl_taum[<= ] Limit flag on taumeta.code.errorchartaum? Merging timescaleGyrtime.scalefloatnullableSep? SeparationsolRadpos.angDistance;src.orbitalfloatnullablee_Sep? Uncertainty in SepsolRadstat.errorfloatnullablelog(h)? Log gravitational wave strainsrc.var.amplitudefloatnullableSloanDisplay the online SDSS data for this starmeta.ref.urlchar_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