J/MNRAS/426/1235ivo://CDS.VizieR/J/MNRAS/426/1235doi:10.26093/cds/vizier.74261235CDSVerbeek K.Groot P.J.Scaringi S.Napiwotzki R.Spikings B.,Ostensen R.H.Drew J.E.Steeghs D.Casares J.Corral-Santana J.M.,Corradi R.L.M.Deacon N.Drake J.J.Gansicke B.T.Gonzalez-Solares E.,Greimel R.Heber U.Irwin M.J.Knigge C.Nelemans G.2024-07-18T20:19:18Z2013-08-02T10:36:28ZCDS support team

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

cds-question@unistra.frultraviolet-astronomysubdwarf-starswhite-dwarf-starsphotometryWe present the results of the first spectroscopic follow-up of 132 optically blue ultraviolet (UV)-excess sources selected from the UV-Excess Survey of the Northern Galactic Plane (UVEX). The UV-excess spectra are classified into different populations and grids of model spectra are fitted to determine spectral types, temperatures, surface gravities and reddening. From this initial spectroscopic follow-up 95 per cent of the UV-excess candidates turn out to be genuine UV-excess sources such as white dwarfs, white dwarf binaries, subdwarf types O and B, emission-line stars and quasi stellar objects. The remaining sources are classified as slightly reddened main-sequence stars with spectral types later than A0V. The fraction of DA white dwarfs is 47 per cent with reddening smaller than E(B-V)<=0.7mag. Relations between the different populations and their UVEX photometry, Galactic latitude and reddening are shown. A larger fraction of UVEX white dwarfs is found at magnitudes fainter than g>17 and Galactic latitude smaller than |b|<4 compared to main-sequence stars, blue horizontal branch stars and subdwarfs.2012MNRAS.426.1235Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/426/1235CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/420/1115 : UV-excess sources from UVEX (Verbeek+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/426/1235https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/426/1235http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/426/1235https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/426/1235https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/426/1235http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/426/1235GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/426/1235/tablea1 (Classifications of the UV-excess spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/426/1235/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/426/1235/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/426/1235/tablea1?GETtext/xml+votable180.050000true0.067793960.5461980.0055555555555555565/735 6/1630-1631 1652 1655 1657 1660 1662 1832 2939 3001 3004-3005 3050 3055 3064-3066 3070 3139 3146 3149-3150 3251 3256 3260-3261 3588 3627 3712 3776 12967 13293 13295 13304 13306 14236 14257 14260-14262 14270 14444 14446-14447 14668 14670-14671 14673 14675 14681-14682 14684 14687 14690-14694 14697 14700 14708 15367 15370 15372 15386 15411 15461 15463 15468 15474 15636 15638 15644 15680 15682 24285 24458 24480 24495 24506 30326 30624 32067https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/426/1235?format=asciiUVOpticaldefaultJ/MNRAS/426/1235/tablea1Classifications of the UV-excess spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFSimbad column added by the CDSmeta.ref.urlcharSeq[1/132] Spectrum numbermeta.idintUVEXUVEX name, JHHMMSS.ss+DDMMSS.smeta.id;meta.maincharprimaryGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latFieldUVEX field in which the object was selectedmeta.id;obs.fieldintSelUVEX selection flag (1)meta.codeintgmagUVEX g magnitudemagphot.mag;em.opt.BfloatU-gUVEX U-g colour indexmagphot.color;em.UV;em.optfloatg-rUVEX g-r colour indexmagphot.color;em.opt.B;em.opt.RfloatHeIIUVEX HeII magnitudemagphot.fluxfloatr-i? UVEX r-i colour indexmagphot.color;em.opt.R;em.opt.Ifloatnullabler-Ha? UVEX r-H{alpha} colour indexmagphot.color;em.opt.R;em.line.HalphafloatnullableRunRun identificationmeta.idcharClassType of object and the 'by eye' most appropriate spectral type of the spectrum (2)src.spTypecharUVDetails from UVEX (Verbeek et al. 2012, Cat. J/MNRAS/420)meta.ref.urlcharFitResult of the spectra fitting (3)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/MNRAS/426/1235/table2Results of the two fitting methods for WHT/ISIS UV-excess spectra classified as white dwarfsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/46] Sequential numbermeta.recordintUVEXUVEX name, JHHMMSS.ss+DDMMSS.smeta.id;meta.maincharTeff1? Effective temperature from first method, fits Teff and loggKphys.temperature.effectiveintnullablee_Teff1? rms uncertainty on Teff1Kstat.errorintnullablelogg1? Surface gravity from first method, fits Teff and logglog(cm.s**-2)phys.gravityfloatnullablee_logg1? rms uncertainty on logg1log(cm.s**-2)stat.errorfloatnullableTeff2Effective temperature from second method, fits Teff and E(B-V)Kphys.temperature.effectiveintE(B-V)2Colour excess from second method, fits Teff and E(B-V)magphot.color.excessfloatJ/MNRAS/426/1235/table3Results of the fitting for UV-excess spectra classified as subdwarfs, MS and BHB starsgmagg magnitudemagphot.mag;em.opt.RfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintUVEXUVEX name, JHHMMSS.ss+DDMMSS.smeta.id;meta.maincharClassClassification/fitting (1)src.classchar