J/MNRAS/445/1331ivo://CDS.VizieR/J/MNRAS/445/1331doi:10.26093/cds/vizier.74451331CDSLi L.Zhang F.Han Q.Kong X.Gong X.2024-08-14T20:18:09Z2015-10-09T15:37:31ZCDS support team

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

cds-question@unistra.frmultiple-starswhite-dwarf-starsdwarf-starsvisible-astronomysloan-photometryinfrared-photometryWe have identified 227 new spectroscopic white-dwarf + main-sequence (WDMS) binaries from the ninth data release (DR9) of the Sloan Digital Sky Survey (SDSS). The SDSS spectra of the newly found WDMS binaries with a DA white dwarf and an M-dwarf are analysed based on a spectral decomposition/fitting method. We obtain the effective temperatures, surface gravities and masses of the white dwarf, together with the spectral types and metallicities of the secondary star. Two independent distance estimates are derived from the flux-scaling factors between the WDMS SDSS spectra and the white dwarf and M-dwarf model spectra. We find that about 25 per cent of the newly found WDMS binaries show a significant discrepancy between the two distance estimates. This might be caused by the effects of M-dwarf stellar activity or irradiation of the M-dwarf companions by the white dwarf. The stellar parameter distributions are used to investigate the global properties of the newly found WDMS binaries. We find that the WDMS binaries with a low signal-to-noise ratio (S/N<=4.0) usually have a massive DA white dwarf component with a higher surface gravity, and the metallicity is usually significantly different from solar. This suggests that the observational selection effects and the spectral S/N of the WDMS binaries have a significant influence on the determinations of these physical parameters of WDMS binaries.2014MNRAS.445.1331Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/445/1331CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/496/191 : Spectral analysis of 636 SDSS WD-M binaries (Heller+, 2009)J/MNRAS/424/1841 : SDSS-UKIDSS white dwarf-main sequence binaries (Liu+, 2012)J/MNRAS/424/1841 : SDSS-UKIDSS white dwarf-main sequence binaries (Liu+, 2012)J/MNRAS/433/3398 : White dwarf main-sequence binaries (Rebassa-Mansergas+ 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/445/1331https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/445/1331http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/445/1331https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/445/1331https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/445/1331http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/445/1331GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/445/1331/catalog (Catalog of 227 WDMS binaries identified in SDSS DR9)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/445/1331/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/445/1331/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/445/1331/catalog?GETtext/xml+votable180.050000true6.16029-2.673520.0055555555555555566/10 43 712 4110 4133 4275 4284 4617 4658-4659 4704 4741 4744 4751 4792 4845 4856 4994 5033 5048 5332 5354 5370 5390 5428 5440 5456 5459 5475 5562 5666 5687 5722 5826 6212 6223 6238 6365 6391 6393 6395 6399 6414 6478 6545 6566 6592 6604 6619 6628-6629 6638 6648 6650-6651 6654 6743 6913 6932 7309 7336 7339 7403 8461 8485 8498 8558 8578 8592 8624 8632 8672 8691-8692 9019 9067 9070 9083 9227-9228 9253 9262 9266 9288 9295-9296 9347 9377 9392 9477 10307 10500 10536 10541 10639 10765 10800-10801 10805 10814 11311 12352 12359 12370 12373 12525 14993 14998 16293 17407 17653 17691-17692 17747 17765-17767 17772 17802 17816 18017 18021 18054 18114 18116 18122 18131 18229 18239 18255 18267 18279 18387 18740 18841 18868 19032 19043 19049 19130 19133-19134 19153 19169 19178 19233 19339 19385 21846 21855 21873 21980 22002 22362 22399 22655 22863 22884 23188 23531 24327 24332 25587 25903 25916 25971 25975 25988 26022 26052 26098 26191 26264 26269 26290 26308 26321 26333 26379 26395 26402 26432 26868 26943 26957 27022 27024 27106 27205 27227 27310 27331 27346 27364 27650 27678 28667 31392 31394 31406 31410 31448 31451 31454 31632 31710 31728 31737 31906 32055 32426 32436 32492 32558 32691 32696 36851 36856 36859 409583.830199579824256e-20 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/445/1331?format=asciiOpticalInfrareddefaultJ/MNRAS/445/1331/catalogCatalog of 227 WDMS binaries identified in SDSS DR9SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS designation (HHMMSS.ss+DDMMSS.s)meta.id;meta.maincharTypeBinary spectral typesrc.spTypecharPlateSDSS plate numbermeta.id;instr.plateintMJDSDSS plate numbertime.epochintFiberSDSS fiber numbermeta.idintTeff1[6/60]? White dwarf effective temperaturekKphys.temperature.effectivefloatnullablelogg1[6.5/9]? White dwarf surface gravitylog(cm.s**-2)phys.gravityfloatnullable[Fe/H][-2/0.4]? Metallicitylog(Sun)phys.abund.ZfloatnullableTeff2[2281/3843]? Secondary effective temperatureKphys.temperature.effectivefloatnullablelogg2[3.5/5.5]? Secondary surface gravitylog(cm.s**-2)phys.gravityfloatnullabled1[44/2840]? White dwarf distancepcpos.distance;pos.heliocentricfloatnullableM1[0.18/1.22]? White dwarf masssolMassphys.massfloatnullableR1[0.006/0.041]? White dwarf radiussolRadphys.size.radiusfloatnullabled2[89/2179]? Secondary distancepcpos.distance;pos.heliocentricfloatnullableM2[0.12/0.47]? Secondary masssolMassphys.massfloatnullableR2[0.11/0.49]? Secondary radiussolRadphys.size.radiusfloatnullableC[-1.1/1.1]? C parameter used to describe the difference between d1 and d2 (1)instr.setup;arith.difffloatnullablelogA[5.2/9.8]? Agelog(yr)time.agefloatnullablechi2r[0.1/56]? Reduced {chi}^2^ valuestat.fit.chi2floatnullableSpInteractive spectrum from SDSSmeta.ref.urlcharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainumagSDSS u magnitudemagphot.mag;em.opt.UfloatgmagSDSS g magnitudemagphot.mag;em.opt.BfloatrmagSDSS r magnitudemagphot.mag;em.opt.RfloatimagSDSS i magnitudemagphot.mag;em.opt.IfloatzmagSDSS z magnitudemagphot.mag;em.opt.IfloatYmag? UKIDSS Y magnitudemagphot.mag;em.IR.JfloatnullableJmag? UKIDSS J magnitudemagphot.mag;em.IR.JfloatnullableHmag? UKIDSS H magnitudemagphot.mag;em.IR.HfloatnullableKmag? UKIDSS Ks magnitudemagphot.mag;em.IR.KfloatnullableJ2mag? 2MASS J magnitudemagphot.mag;em.IR.JfloatnullableH2mag? 2MASS H magnitudemagphot.mag;em.IR.HfloatnullableK2mag? 2MASS Ks magnitudemagphot.mag;em.IR.KfloatnullableW1mag? WISE W1 magnitude (3.4{mu}m)magphot.mag;em.IR.3-4umfloatnullabler_W1mag[1] 1 = D'Angelo et al. 2006AJ....132..650Dmeta.refcharW2mag? WISE W2 magnitude (4.6{mu}m)magphot.mag;em.IR.4-8umfloatnullable