J/MNRAS/435/2077ivo://CDS.VizieR/J/MNRAS/435/2077doi:10.26093/cds/vizier.74352077CDSHolberg J.B.Oswalt T.D.Sion E.M.Barstow M.A.Burleigh M.R.2024-08-06T20:17:02Z2014-11-07T14:12:56ZCDS support team

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

cds-question@unistra.frmultiple-starswhite-dwarf-starsstellar-distanceorbitsApproximately 70% of the nearby white dwarfs appear to be single stars, with the remainder being members of binary or multiple star systems. The most numerous and most easily identifiable systems are those in which the main-sequence companion is an M star, since even if the systems are unresolved the white dwarf either dominates or is at least competitive with the luminosity of the companion at optical wavelengths. Harder to identify are systems where the non-degenerate component has a spectral type earlier than M0 and the white dwarf becomes the less luminous component. Taking Sirius as the prototype, these latter systems are referred to here as 'Sirius like'. There are currently 98 known Sirius-like systems. Studies of the local white dwarf population within 20pc indicate that approximately 8 percent of all white dwarfs are members of Sirius-like systems, yet beyond 20pc the frequency of known Sirius-like systems declines to between 1 and 2 percent, indicating that many more of these systems remain to be found. Estimates are provided for the local space density of Sirius-like systems and their relative frequency among both the local white dwarf population and the local population of A to K main-sequence stars. The great majority of currently unidentified Sirius-like systems will likely turn out to be closely separated and unresolved binaries. Ways to observationally detect and study these systems are discussed.2013MNRAS.435.2077Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/435/2077CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/299/621 : Is Sirius a triple star? (Benest+, 1995)J/A+AS/136/293 : Sirius photographic observations (Jasinta+, 1999)J/ApJS/126/461 : Equivalent Widths in the Spectrum of Sirius (Zhao+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/435/2077https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/435/2077http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/435/2077https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/435/2077https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/435/2077http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/435/2077GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/435/2077/catalog (Known SLSs (table1) and orbital properties (table2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/435/2077/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/435/2077/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/435/2077/catalog?GETtext/xml+votable180.050000true6.1717308-74.23455580.0055555555555555566/222 311 1077 1185 1227 1283 1885 2402 2761 5176 5321 6129 7212 7349 7571 7886 8133 8324 8626 9066 9109 9483 9892 10130 10359 11429 11629 11764 12055 12639 12698 13158 13714 16053 16209 16329 16697 17229 17352 17748 17766 17919 17989 18351 18548-18549 19097 19541 19727 20205 20738 20940 22300 22459 22616 22709 23182 23523 23755 24713 24862 25099 25138 25552 26509 26864 27322 28028 28260 28498 31497 31690 31894 31933 33243 33313 33576 34280 34505 34515 34519 35079 36836 37082 38955 39689 39709 40283 40540 42091 42115 42366 42700 42760 45380 47180 47657 48516https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/435/2077?format=asciidefaultJ/MNRAS/435/2077/catalogKnown SLSs (table1) and orbital properties (table2)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWDWhite dwarf designation (HHMM+DDd)meta.id;meta.maincharNameAlternative name of the white dwarfmeta.idName1Luminous companion name (primary)meta.id.assoccharSpTWD spectral typesrc.spTypecharSpT1MK spectral type of the companionsrc.spTypecharl_Teff[~>] Limit flag on Teffmeta.code.error;phys.temperature.effectivecharTeff? Effective temperature of the WDKphys.temperature.effectiveintnullableVmag? V magnitude of the WDmagphot.mag;em.opt.VfloatnullableVmag1? V magnitude of the companionmagphot.mag;em.opt.Vfloatnullablel_rhoLimit flag on rhometa.code.errorcharrho[0.03/870]? Separation angle {rho}arcsecpos.angDistance;src.orbitalfloatnullablen_rho[OU] U for unresolved, O for orbitmeta.notechartheta[0/360]? Position angle {theta}degpos.posAngfloatnullableDist[2.6/800]? Heliocentric distancepcpos.distancefloatnullablee_Dist? rms uncertainty on Distpcstat.errorfloatnullableNc[2/5] Number of known components in the systemmeta.numberintM[0.3/1.7]? Mass of the white dwarfsolMassphys.massfloatnullableM1[0.5/700]? Mass of the companionsolMassphys.massfloatnullablel_apLimit flag on apmeta.code.errorcharap? Projected physical separationAUpos.angDistancedoublenullablel_aLimit flag on ameta.code.errorchara? Estimated semimajor axisAUphys.size.smajAxisdoublenullablel_PLimit flag on Permeta.code.errorcharP? Estimated orbital periodyrtime.perioddoublenullableDtheta? Estimated orbital motion for resolved WD-luminous star pairs (arcsec/Myr)uarcsec/yrsrc.orbitaldoublenullablel_dmu/dtLimit flag on dmu/dtmeta.code.errorchardmu/dt? Expected annual acceleration in angular velocity of the luminous componentuarcsec.yr**-2phys.accelerationdoublenullablel_dV/dtLimit flag on dV/dtmeta.code.errorchardV/dt? Expected annual acceleration in radial velocity of the luminous componentm.s**-1.yr**-1phys.accelerationdoublenullableNNotes about the systemmeta.ref.urlcharComCommentsmeta.notechar_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