J/A+A/690/A68ivo://CDS.VizieR/J/A+A/690/A68doi:10.26093/cds/vizier.36900068CDSSidharth A.V.Shridharan B.Mathew B.Devaraj A.Cysil T.B.,Stalin C.S.Arun R.Bhattacharyya S.Kartha S.S.Robin T.2025-02-18T20:01:41Z2024-09-27T10:38:50ZCDS support team

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

cds-question@unistra.frmilky-way-galaxywhite-dwarf-starsultraviolet-photometryIn this study, we demonstrate the efficacy of the Ultraviolet Imaging Telescope (UVIT) in identifying and characterizing white dwarfs (WDs) within the Milky Way Galaxy. Leveraging the UVIT point source catalogue towards SMC and crossmatching with Gaia DR3 data, we identified 43 single WDs (37 new detections), 13 new WD+main sequence (MS) candidates and 161 UV bright MS stars by analysing their Spectral Energy Distributions (SED). Using the WD evolutionary models, we determine the masses, effective temperatures, and cooling ages of these identified WDs. Masses of these WDs range from 0.2 to 1.3M_{sun}_ and effective temperatures (Teff) between 10000K to 15000K, with cooling ages spanning 0.1 to 2Gyr. Notably, we detect hotter WDs compared to literature values, which is attributed to the sensitivity of UVIT. Furthermore, we report the detection of 20 new extremely low-mass (ELM) candidates from our analysis. Future spectroscopic studies of the ELM candidates will help us understand the formation scenarios of these exotic objects. Despite limitations in Gaia DR3 distance measurements for optically faint WDs, we provide a crude estimate of the WD space density within 1kpc as 1.3x10^-3^pc^-3^, which is higher than previous estimates in the literature. Our results underscore the instrumental capabilities of UVIT and anticipate the forthcoming UV missions like INSIST for systematic WD discovery. Our methodology sets a precedent for future analyses in other UVIT fields to find more WDs and perform spectroscopic studies to verify their candidacy.2024A&A...690A..68Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/690/A68CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/690/A68https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/690/A68http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/690/A68https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/690/A68https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/690/A68http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/690/A68GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/690/A68/table1 (List of the 43 single white dwarfs identified in the present study)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/690/A68/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/690/A68/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/690/A68/table1?GETtext/xml+votable180.050000true17.69418-71.554540.005555555555555556Cone search capability for table J/A+A/690/A68/table2 (List of the 13 WD+MS candidates identified from the present study)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/690/A68/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/690/A68/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/690/A68/table2?GETtext/xml+votable180.050000true17.58841-71.29290.005555555555555556Cone search capability for table J/A+A/690/A68/tablea1 (List of 273 sources with their UVIT magnitudes used in this study with literature (SIMBAD) match)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/690/A68/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/690/A68/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/690/A68/tablea1?GETtext/xml+votable180.050000true17.80608-71.472530.005555555555555556Cone search capability for table J/A+A/690/A68/tableb1 (List of the 161 UV bright MS stars identified from the present study)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/690/A68/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/690/A68/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/690/A68/tableb1?GETtext/xml+votable180.050000true17.35431-71.59060.0055555555555555566/33328-333291.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/690/A68?format=asciiUVdefaultJ/A+A/690/A68/table1List of the 43 single white dwarfs identified in the present studyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintF169Mmag? Magnitude in UVIT/F169M filtermagphot.mag;em.UVdoublenullablee_F169Mmag? Error in Magnitude in UVIT/F169M filtermagstat.errordoublenullableGaiaDR3Unique source identifier provided by Gaia DR3meta.id;meta.mainRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDistDistancepcpos.distancefloatb_DistLower limit of distancepcpos.distance;stat.minfloatB_DistUpper limit of distancepcpos.distance;stat.maxfloatN263Mmag? Magnitude in UVIT/N263M filtermagphot.mag;em.UVdoublenullablee_N263Mmag? Error in Magnitude in UVIT/N263M filtermagstat.error;phot.magdoublenullableN245Mmag? Magnitude in UVIT/N245M filtermagphot.mag;em.UVdoublenullablee_N245Mmag? Error in Magnitude in UVIT/N245M filtermagstat.error;phot.magdoublenullableN279Nmag? Magnitude in UVIT/N279N filtermagphot.mag;em.UVdoublenullablee_N279Nmag? Error in Magnitude in UVIT/N279N filtermagstat.error;phot.magdoublenullableF172Mmag? Magnitude in UVIT/F172M filtermagphot.mag;em.UVdoublenullablee_F172Mmag? Error in Magnitude in UVIT/F172M filtermagstat.errordoublenullableF154Wmag? Magnitude in UVIT/F154W filtermagphot.mag;em.UVdoublenullablee_F154Wmag? Error in Magnitude in UVIT/F154W filtermagstat.errordoublenullableN219Mmag? Magnitude in UVIT/N219M filtermagphot.mag;em.UVdoublenullablee_N219Mmag? Error in Magnitude in UVIT/N219M filtermagstat.error;phot.magdoublenullableTeffEffective temperature of the White DwarfKphys.temperature.effectiveintloggSurface gravity of the White Dwarflog(cm.s**-2)phys.gravityfloatCoolAgeCooling age of the White Dwarf in GyrGyrtime.agefloatMassMass of the White Dwarf in solar masssolMassphys.massfloatRemarksRemark if the WD is an ELM or not?meta.notecharJ/A+A/690/A68/table2List of the 13 WD+MS candidates identified from the present studyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Unique source identifier provided by Gaia DR3meta.id;meta.mainRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDistDistancepcpos.distancefloatb_DistLower limit of Distancepcpos.distance;stat.minfloatB_DistUpper limit of distancepcpos.distance;stat.maxfloatN263Mmag? Magnitude in UVIT/N263M filtermagphot.mag;em.UVdoublenullablee_N263Mmag? Error in Magnitude in UVIT/N263M filtersmagstat.error;phot.magdoublenullableN245Mmag? Magnitude in UVIT/N245M filtermagphot.mag;em.UVfloatnullablee_N245Mmag? Error in Magnitude in UVIT/N245M filtersmagstat.error;phot.magfloatnullableN279Nmag? Magnitude in UVIT/N279N filtermagphot.mag;em.UVdoublenullablee_N279Nmag? Error in Magnitude in UVIT/N279N filtersmagstat.error;phot.magdoublenullableF172Mmag? Magnitude in UVIT/F172M filtermagphot.mag;em.UVdoublenullablee_F172Mmag? Error in Magnitude in UVIT/F172M filtersmagstat.errordoublenullableF169Mmag? Magnitude in UVIT/F169M filtermagphot.mag;em.UVdoublenullablee_F169Mmag? Error in Magnitude in UVIT/F169M filtersmagstat.errordoublenullableF154Wmag? Magnitude in UVIT/F154W filtermagphot.mag;em.UVdoublenullablee_F154Wmag? Error in Magnitude in UVIT/F154W filtersmagstat.errordoublenullableN219Mmag? Magnitude in UVIT/N219M filtermagphot.mag;em.UVdoublenullablee_N219Mmag? Error in Magnitude in UVIT/N219M filtersmagstat.error;phot.magdoublenullableTeffMSEffective temperature of the MS componentKphys.temperature.effectiveintloggMSSurface gravity of the MS componentlog(cm.s**-2)phys.gravityfloatb_TeffMSLower limit of effective temperature of the MS componentKphys.temperature.effective;stat.minintB_TeffMSUpper limit of effective temperature of the MS componentKphys.temperature.effective;stat.maxintb_loggMSLower limit of surface gravity of the MS componentlog(cm.s**-2)phys.gravity;stat.minfloatB_loggMSUpper limit of surface gravity of the MS componentlog(cm.s**-2)phys.gravity;stat.maxfloatTeffWDEffective temperature of the WD componentKphys.temperature.effectiveintloggWDSurface gravity of the WD componentphys.gravityfloatCoolgAgeCooling age of the White Dwarf in GyrGyrtime.agefloatMassMass of the White Dwarf in solar masssolMassphys.massfloatRemarksRemark if the WD is an ELM or not?meta.notecharJ/A+A/690/A68/tablea1List of 273 sources with their UVIT magnitudes used in this study with literature (SIMBAD) matche_N279Nmag? Error in Magnitude in UVIT/N279N filtermagstat.error;phot.magfloatnullableF172Mmag? Magnitude in UVIT/F172M filtermagphot.mag;em.UVfloatnullablee_F172Mmag? Error in Magnitude in UVIT/F172M filtermagstat.errorfloatnullableMainIdObject ID given by SIMBADmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Unique source identifier provided by Gaia DR3meta.id;meta.mainRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDistDistancepcpos.distancedoubleb_DistLower limit of distancepcpos.distance;stat.mindoubleB_DistUpper limit of distancepcpos.distance;stat.maxdoubleGmag? Magnitude in Gaia DR3 G band filtermagphot.mag;em.opt.Vfloatnullablee_Gmag? Error in magnitude in Gaia DR3 G band filtermagstat.error;phot.magfloatnullableBpmag? Magnitude in Gaia DR3 BP band filtermagphot.mag;em.opt.Bfloatnullablee_Bpmag? Error in Magnitude in Gaia DR3 BP band filtermagstat.error;phot.magfloatnullableRpmag? Magnitude in Gaia DR3 RP band filtermagphot.mag;em.opt.Rfloatnullablee_Rpmag? Error in Magnitude in Gaia DR3 RP band filtermagstat.error;phot.magfloatnullableN263Mmag? Magnitude in UVIT/N263M filtermagphot.mag;em.UVfloatnullablee_N263Mmag? Error in Magnitude in UVIT/N263M filtermagstat.error;phot.magfloatnullableN245Mmag? Magnitude in UVIT/N245M filtermagphot.mag;em.UVfloatnullablee_N245Mmag? Error in Magnitude in UVIT/N245M filtermagstat.error;phot.magfloatnullableN279Nmag? Magnitude in UVIT/N279N filtermagphot.mag;em.UVfloatnullabler_MainIdReference bib codemeta.ref;pos.framecharMainTypeObject type given by SIMBADsrc.classcharF169Mmag? Magnitude in UVIT/F169M filtermagphot.mag;em.UVfloatnullablee_F169Mmag? Error in Magnitude in UVIT/F169M filtermagstat.errorfloatnullableF154Wmag? Magnitude in UVIT/F154W filtermagphot.mag;em.UVfloatnullablee_F154Wmag? Error in Magnitude in UVIT/F154W filtermagstat.errorfloatnullableN219Mmag? Magnitude in UVIT/N219M filtermagphot.mag;em.UVfloatnullablee_N219Mmag? Error in Magnitude in UVIT/N219M filtermagstat.error;phot.magfloatnullableJ/A+A/690/A68/tableb1List of the 161 UV bright MS stars identified from the present studyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainDistDistancepcpos.distancefloatN263Mmag? Magnitude in UVIT/N263M filtermagphot.mag;em.UVdoublenullablee_N263Mmag? Error in Magnitude in UVIT/N263M filtermagstat.error;phot.magdoublenullableN245Mmag? Magnitude in UVIT/N245M filtermagphot.mag;em.UVdoublenullablee_N245Mmag? Error in Magnitude in UVIT/N245M filtermagstat.error;phot.magdoublenullableN279Nmag? Magnitude in UVIT/N279N filtermagphot.mag;em.UVdoublenullablee_N279Nmag? Error in Magnitude in UVIT/N279N filtermagstat.error;phot.magdoublenullableF172Mmag? Magnitude in UVIT/F172M filtermagphot.mag;em.UVdoublenullablee_F172Mmag? Error in Magnitude in UVIT/F172M filtermagstat.errordoublenullableF169Mmag? Magnitude in UVIT/F169M filtermagphot.mag;em.UVdoublenullablee_F169Mmag? Error in Magnitude in UVIT/F169M filtermagstat.errordoublenullableF154Wmag? Magnitude in UVIT/F154W filtermagphot.mag;em.UVdoublenullablee_F154Wmag? Error in Magnitude in UVIT/F154W filtermagstat.errordoublenullableN219Mmag? Magnitude in UVIT/N219M filtermagphot.mag;em.UVdoublenullablee_N219Mmag? Error in Magnitude in UVIT/N219M filtermagstat.error;phot.magdoublenullableTeffEffective temperature of the MS starKphys.temperature.effectiveintloggSurface gravity of the MS starlog(cm.s**-2)phot.sbfloat