J/MNRAS/513/5847ivo://CDS.VizieR/J/MNRAS/513/5847doi:10.26093/cds/vizier.75135847CDSPatrick L.R.Thilker D.Lennon D.J.Bianchi L.Schootemeijer A.,Dorda R.Langer N.Negueruela I.2024-08-22T20:15:35Z2022-12-16T13:16:57ZCDS support team

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

cds-question@unistra.frmagellanic-cloudssupergiant-starsmultiple-starsultraviolet-astronomyWe aim to identify and characterise binary systems containing red supergiant (RSG) stars in the Small Magellanic Cloud (SMC) using a newly available ultraviolet (UV) point source catalogue obtained using the Ultraviolet Imaging Telescope (UVIT) on board AstroSat. We select a sample of 561 SMC RSGs based on photometric and spectroscopic observations at optical wavelengths and cross-match this with the far-UV point source catalogue using the UVIT F172M filter, finding 88 matches down to an AB magnitude of 20.3, which we interpret as hot companions to the RSGs. Stellar parameters (luminosities, effective temperatures and masses) for both components in all 88 binary systems are determined and we find mass distributions in the ranges 6.2<M/M_{sun}_<20.3 for RSGs and 3.7<M/M_{sun}_<15.6 for their companions. The most massive RSG binary system in the SMC has a combined mass of 30+/-2M_{sun}_, with a mass ratio (q) of 0.94. To determine the intrinsic multiplicity fraction for RSGs in the SMC, we simulate observational biases and find 18.8+/-1.5% for mass ratios in the range 0.3<q<1.0 and orbital periods approximately in the range 3<logP[days]<8. By comparing our results with those of a similar mass on the main-sequence, we determine the fraction of single stars to be ~20% and argue that the orbital period distribution declines rapidly beyond logP~3.5. We study the mass-ratio distribution of RSG binary systems and find that a uniform distribution best describes the data below 14M_{sun}_. Above 14M_{sun}_, we find a lack of high mass-ratio systems.2022MNRAS.513.5847Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/513/5847CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/350 : Gaia EDR3 (Gaia Collaboration, 2020)J/A+A/629/A91 : A source catalog for the SMC (Yang+, 2019)J/A+A/639/A116 : RSGs in the SMC (Yang+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/513/5847https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/513/5847http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/513/5847https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/513/5847https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/513/5847http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/513/5847GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/513/5847/tablea1 (RSG full sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/513/5847/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/513/5847/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/513/5847/tablea1?GETtext/xml+votable180.050000true6.582809125-72.79467694440.005555555555555556Cone search capability for table J/MNRAS/513/5847/tablea2 (RSG binary systems)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/513/5847/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/513/5847/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/513/5847/tablea2?GETtext/xml+votable180.050000true12.0398035771191-72.35794537208150.0055555555555555565/8323-8324 8326 8329 6/32955 33285 33287 33302 33310 33313 33315 33328-333308.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/513/5847?format=asciiUVdefaultJ/MNRAS/513/5847/tablea1RSG full sampleNameNamemeta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSimbadNameSimbad column added by the CDSmeta.idcharnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainJ2mag? 2MASS J-band magnitudemagphot.mag;em.IR.Jfloatnullablee_J2mag? Error on 2MASS J-band magnitudemagstat.error;phot.magfloatnullableKs2mag? 2MASS Ks-band magnitudemagphot.mag;em.IR.Kfloatnullablee_MrsgError on RSG masssolMassstat.errorfloate_Ks2mag? Error on 2MASS Ks-band magnitudemagstat.error;phot.magfloatnullableE(V-I)Reddening from Skowron+2021magphot.color.excessfloate_E(V-I)Negative error on E(V-I)magstat.errorfloatE_E(V-I)Positive error on E(V-I)magstat.error;stat.maxfloatAVV-band extinctionmagphys.absorptionfloate_AVNegative error on AVmagstat.errorfloatE_AVPositive error on AVmagstat.error;stat.maxfloatMrsgRSG masssolMassphys.massfloatTeffrsg? RSG effective temperatureKphys.temperature.effectiveintnullablelogLrsg? RSG luminositylog(solLum)phys.luminosityfloatnullablee_logLrsg? Error on RSG luminositylog(solLum)stat.errorfloatnullableBinindicates binary system with data in table A2meta.ref.urlcharJ/MNRAS/513/5847/tablea2RSG binary systemsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNamemeta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainF172MmagF172M UVIT magnitude (AB)magphot.mag;em.UV.100-200nmfloate_F172MmagError on F172M UVIT magnitude (AB)magstat.errorfloatJ2mag2MASS J-band magnitudemagphot.mag;em.IR.Jfloate_J2magError on 2MASS J-band magnitudemagstat.error;phot.magfloatKs2mag2MASS Ks-band magnitudemagphot.mag;em.IR.Kfloate_Ks2magError on Ks-band magnitudemagstat.error;phot.magfloatE(V-I)Reddening from Skowron+2021magphot.color.excessfloate_E(V-I)Negative error on E(V-I)magstat.errorfloatE_E(V-I)Positive error on E(V-I)magstat.error;stat.maxfloatAVV-band extinctionmagphys.absorptionfloate_AVNegative error on AVmagstat.errorfloatE_AVPositive error on AVmagstat.error;stat.maxfloatMrsgRSG masssolMassphys.massfloate_MrsgError on RSG masssolMassstat.errorfloatTeffrsgRSG effective temperatureKphys.temperature.effectiveintlogLrsgRSG luminositylog(solLum)phys.luminosityfloate_logLrsgError on RSG luminositylog(solLum)stat.errorfloatM2Companion masssolMassphys.massfloate_M2Error on companion masssolMassstat.errorfloatTeff2Companion effective temperatureKphys.temperature.effectivefloatE_Teff2Positive error on Teff2Kstat.error;stat.maxfloate_Teff2Negative error on Teff2Kstat.errorfloatlogL2Companion luminositylog(solLum)phys.luminosityfloatE_logL2Positive error on logL2log(solLum)stat.error;stat.maxfloate_logL2Negative error on logL2log(solLum)stat.errorfloatdRV? RV difference from Dorda & Patrick (2021MNRAS.502.4890D)phys.veloc;arith.difffloatnullableFlagN20[0/1] Flagged as RSG binary in Neugent et al. (2020ApJ...889...44N)meta.code.errorint