J/A+A/570/A107ivo://CDS.VizieR/J/A+A/570/A107doi:10.26093/cds/vizier.35700107CDSRen J. J.Rebassa-Mansergas A.Luo A. L.Zhao Y. H.Xiang M. S.,Liu X. W.Zhao G.Jin G.Zhang Y.2017-12-06T07:38:20Z2014-10-31T09:29:14ZCDS support team

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

cds-question@unistra.frwhite-dwarf-starsm-starsspectroscopic-binary-starsWhite dwarf-main sequence (WDMS) binaries are used to study several different important open problems in modern astrophysics. The Sloan Digital Sky Survey (SDSS) identified the largest catalogue of WDMS binaries currently known. However, this sample is seriously affected by selection effects and the population of systems containing cool white dwarfs and early-type companions is under-represented. Here we search for WDMS binaries within the spectroscopic data release 1 of the LAMOST (Large sky Area Multi-Object fiber Spectroscopic Telescope) survey. LAMOST and SDSS follow different target selection algorithms. Hence, LAMOST WDMS binaries may be drawn from a different parent population and thus help in overcoming the selection effects incorporated by SDSS on the current observed population. We develop a fast and efficient routine based on the wavelet transform to identify LAMOST WDMS binaries containing a DA white dwarf and a M dwarf companion, and apply a decomposition/fitting routine to their LAMOST spectra to estimate their distances and measure their stellar parameters, namely the white dwarf effective temperatures, surface gravities and masses, and the secondary star spectral types. We identify 121 LAMOST WDMS binaries, 80 of which are new discoveries, and estimate the sample to be about 90 per cent complete. The LAMOST and SDSS WDMS binaries are found to be statistically different. However, this result is not due to the different target selection criteria of both surveys, but likely a simple consequence of the different observing conditions. Thus, the LAMOST population is found at considerably shorter distances (50-450pc) and is dominated by systems containing early-type companions and hot white dwarfs. Even though WDMS binaries containing cool white dwarfs are also missed by the LAMOST survey, the LAMOST WDMS binary sample dominated by systems containing early-type companions is an important addition to the current known spectroscopic catalogue. Future LAMOST observations however are required to increase the small number of LAMOST WDMS binaries.2014A&A...570A.107Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/570/A107CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/570/A107https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/570/A107http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/570/A107https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/570/A107https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/570/A107http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/570/A107GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/570/A107/catalog (Catalogue of the 133 DA/M binary spectra, completed with 185 stars not considered as DA/M binaries)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/570/A107/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/570/A107/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/570/A107/catalog?GETtext/xml+votable180.050000true5.657916733.72280560.0055555555555555565/6123 6/80 439 463 474 496-497 511 788 842 852 865-866 890 971 1071 1085 1101 1106-1107 1183 1197 1281 1284 1303 1306 1328-1329 1352 1367 1543 1619 1621 1684 1797 1837 1842 1847 1908 1927 1935 2094 2157 2455 2591 2623 2656 2666 2671 2708-2709 2717 4116 4126 4185 4212-4213 4330 4413 4440 4450 4458 4494 4609 4648 4667 4756 4758 4764 4766 4797 4824 4843 4894 4918 4925 4927 4939 4942 4963 4965-4966 4985 5010 5037 5048 5057 5148 5185 5197 5207 5217 5226 5251 5253 5275 5278 5295 5361 5367 5408 5798 5898 5902 5914 5919 5942 5959 6014 6100 6195-6196 6208 6216 6226 6240 6244 6260 6277 6280-6281 6294 6310-6311 6426 6510 6612 6664 6670 6674 6719 6848 7057 7117 7143 7152 7218 7330 8878 8990 9015 9026 9112 9208 9435 9465 9832 9872 9966 10090 10095 10299 10312 10347 10381 10388 10497 10562 10706 10751 10945 10975 10992 11006 11022 11109 11116 11155 11201-11202 11211 11337 11811 13368 13454 14587 14929 17750-17751 17873 18006 18314 18868 19034 19186 19201 19207 19962 20210 20212 20290 20335 20341 20348 20436 21758 21797 21816 21911 21959 22001 22173 22240 22295 22311 22337 22379 22420 22478 23290 23371 23789 23793 23808 23813 23823 24013 24026 24056 24060 24156 24190 24322 24328 24374 24379 24385 24401 24426 24455 24468 24471 24482-24483 24496 24536 24573 26027 26203 26456 26567 26574 26621 27035 27210 27216 27218 27235 27273 27290 27485 27504 27838 28139 28142 28150-28151 28188 28411 28475 28479 28484 28492 28494-28495 28506-28507 28515 28517 28566 28577 28579-28580 31381 31701 36859https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/570/A107?format=asciidefaultJ/A+A/570/A107/table3Radial velocities for 69 sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJNameSDSS designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharHJDHeliocentric Julian date of observationtime.epochdoubleRV(Ha)? H{alpha} emission radial velocitykm/sspect.dopplerVelocfloatnullablee_RV(Ha)? H{alpha} emission radial velocity errorkm/sstat.errorfloatnullableRV(NaI)? NaI absorption doublet radial velocity ({lambda}8183.27,8194.81{AA})km/sspect.dopplerVelocfloatnullablee_RV(NaI)? NaI absorption doublet radial velocity errorkm/sstat.errorfloatnullableTelTelescope (LAMOST or SDSS)meta.id;instr.telcharJ/A+A/570/A107/catalogCatalogue of the 133 DA/M binary spectra, completed with 185 stars not considered as DA/M binariesd? White dwarf distancepcpos.distance;pos.heliocentricintnullableS/N? Signal-to-noise ratiostat.snrfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJNameSDSS designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimaryMJDModified Julian date of observationdtime.epochintPlatePlate identifiermeta.id;instr.platecharSPID[1/16] Spectrograph identifiermeta.id;instrintFiber[1/248] Fiber identifiermeta.idintTeff? White dwarf effective temperatureKphys.temperature.effectiveintnullablee_Teff? White dwarf effective temperature errorKstat.error;phys.temperature.effectiveintnullablelogg? White dwarf surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_logg? White dwarf surface gravity errorlog(cm.s**-2)stat.errorfloatnullableM? White dwarf masssolMassphys.massfloatnullablee_M? White dwarf mass errorsolMassstat.errorfloatnullablee_d? White dwarf distance errorpcstat.errorintnullableSp[0/6]? M-subtype of the companionsrc.spTypeintnullablef_Sp[0/1] 1=not a genuine DA/M type? (1)meta.codeintNvNumber of velocity measurements (table 3)meta.numberintnullablespShow the spectrummeta.ref.urlcharVCPlot of the velocity curvemeta.ref.urlcharFileNameName of spectrum file in subdirectory spmeta.id;meta.filecharumag? u-band magnitudemagphot.mag;em.opt.Ufloatnullablegmag? g-band magnitudemagphot.mag;em.opt.Bfloatnullablermag? r-band magnitudemagphot.mag;em.opt.Rfloatnullableimag? i-band magnitudemagphot.mag;em.opt.Ifloatnullablezmag? z-band magnitudemagphot.mag;em.opt.IfloatnullableFlag? Magnitude origin (SDSS or Xuyi)meta.code.errorcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition of the object (derived from its JName) (right ascension part)degpos.eq.ra;meta.main_DEPosition of the object (derived from its JName) (declination part)degpos.eq.dec;meta.main