J/MNRAS/487/2474ivo://CDS.VizieR/J/MNRAS/487/2474doi:10.26093/cds/vizier.74872474CDSCotar K.Zwitter T.Traven G.Kos J.Asplund M.Bland-Hawthorn J.,Buder S.DOrazi V.De Silva G.M.Lin J.Martell S.L.Sharma S.,Simpson J.DZucker D.BHorner J.Lewis G.FNordlander T.Ting Y.-S.,Wittenmyer R.A.GALAH collaboration2024-08-19T20:18:54Z2019-06-22T14:01:05ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyg-starsmultiple-starsThe latest Gaia data release enables us to accurately identify stars that are more luminous than would be expected on the basis of their spectral type and distance. During an investigation of the 329 best solar twin candidates uncovered among the spectra acquired by the GALAH survey, we identified 64 such overluminous stars. In order to investigate their exact composition, we developed a data-driven methodology that can generate a synthetic photometric signature and spectrum of a single star. By combining multiple such synthetic stars into an unresolved binary or triple system and comparing the results to the actual photometric and spectroscopic observations, we uncovered 6 definitive triple stellar system candidate and an additional 14 potential candidates whose combined spectrum mimics the solar spectrum. Considering the volume correction factor for a magnitude-limited survey, the fraction of probable unresolved triple stars with long orbital periods is 2 per cent. Possible orbital configurations of the candidates were investigated using the selection and observational limits. To validate the discovered multiplicity fraction, the same procedure was used to evaluate the multiplicity fraction of other stellar types.2019MNRAS.487.2474Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/487/2474CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://galah-survey.org/ : GALAH home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/487/2474https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/487/2474http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/487/2474https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/487/2474https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/487/2474http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/487/2474GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/487/2474/catalog (Catalogue of analysed objects)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/487/2474/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/487/2474/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/487/2474/catalog?GETtext/xml+votable180.050000true59.5012913142479318.27153049251160.0055555555555555566/353 4152 4660 4698 16491 16808 18006 18009 18018 18116 18131 18538 18570 18582 18584 18588 18753 18763 18960-18961 18990 19035 19210 19237 19244 19256 19278 19328 19342 20495 20586 21144 22549 22771 22955 23132 23134 23325 23526 24216 24254 24592 24607 24730 25108 25110 25127 25428 25466 25643 25714 26208 26972 26985 26995 27077 27100 27171 27591 29334 29352 29697 30188 31113 31199 31428 31501 31561 32823 32866 32876 32878 32940-32941 32948 33035 33071 33089 33097 33146-33147 33156 33173-33174 33211 33240 33291 33333 33353 33396 33405 33427 33429 33468 33474 33840 33866 33882 33896 33996 34144 34273 34276 34573 34818 34953 35338 35710 35815 37387 37450 37482 37526-37527 37562 37569 37571 37579 37601 37612 37766 38156 38159 38187 38192 38194 38201 38230 38242 38270 38334 38367 38389 38481 38672 38683 38691 38731 38733 38737 38752-38753 38798 38808 38832 38927 38957 38960 38968 38973 39043 39045 39065 39644 40230 40290 40327 40337 40392 41038 41048 41064-41065 41084 41152 41154 41248 41261 41265 41281 41289 41354 41363 41369 41410 41966 42016 42054 42257 42704-42705 43199 43206 43223 43241 43293 43358 43425 43487 43496 43505 43510 43523 43552 43572 43589 43594 43610 43615 43622 43644 43689 43715 43741 43748-43749 43753 43793 43795 43800 43931 43954 43984 44037 44044 44124 44138 44198 44201 44242 44261 44294 44300 44308 44413 44445 44480 44492 44560 44729 45117 45141 45158 45174 45177 45205 45329-45330 45332 45355 45359 45382 45386 45415 45421 45471 45496 45502 45538 45540 45551 45565 45758 45833 45891 45900 45919 45923 45925 45936 45947 45951 45955 45996 46013 46034 46073 46098 46103 46283 46634 46642 46758 46792-46793 47124 47166 47220 47257-47258 47289 47325 47334-47335 47408 47411 47433 47466 47475-47476 47484 47518 47568 47734 47833 47941 48110 48154-48155 48201 48212 48223 48243 48246 48289 48419 48690 48927https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/487/2474?format=asciidefaultJ/MNRAS/487/2474/catalogCatalogue of analysed objectsSimbadNameSimbad column added by the CDSmeta.idcharnullable_RA.icrsRight ascension (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2? Gaia DR2 identifier, source_id (source_id)meta.idnullableGALAHGALAH unique per observation id (sobject_id)meta.id;meta.mainRA_ICRSRight ascension from Gaia DR2 (ICRS) at epoch 2015.5 (ra)degpos.eq.ra;meta.mainDE_ICRSDeclination from Gaia DR2 (ICRS) at epoch 2015.5 (dec)degpos.eq.dec;meta.mainRUWEValue of renormalized astrometric chi2 (ruwe)stat.fit.paramdoublemsimpPhotometric chi2 for original parameters (m_sim_p)stat.fit.chi2doublemsimfSpectroscopic chi2 for original parameters (m_sim_f)stat.fit.chi2doubles1Teff1Teff1 in a fitted single system (s1_teff1)Kmeta.modelleddoubles1[Fe/H]Abundance of [Fe/H] in a fitted single system (s1_feh)phys.abund.Fedoubles1simp? Photometric chi2 of a fitted single system (s1_sim_p)stat.fit.chi2doublenullables1simf? Spectroscopic chi2 of a fitted single system (s1_sim_f)stat.fit.chi2doublenullables2Teff1Teff1 in a fitted binary system (s2_teff1)Kmeta.modelleddoubles2Teff2Teff2 in a fitted binary system (s2_teff2)Kmeta.modelleddoubles2[Fe/H]Abundance of [Fe/H] in a fitted binary system (s2_feh)phys.abund.Fedoubles2simp? Photometric chi2 of a fitted binary system (s2_sim_p)stat.fit.chi2doublenullables2simf? Spectroscopic chi2 of a fitted binary system (s2_sim_f)stat.fit.chi2doublenullables3Teff1? Teff1 in a fitted triple system (s3_teff1)Kmeta.modelleddoublenullables3Teff2? Teff2 in a fitted triple system (s3_teff2)Kmeta.modelleddoublenullables3Teff3? Teff3 in a fitted triple system (s3_teff3)Kmeta.modelleddoublenullables3[Fe/H]? Abundance of [Fe/H] in a fitted triple system (s3_feh)phys.abund.Fedoublenullables3simp? Photometric chi2 of a fitted triple system (s3_sim_p)stat.fit.chi2doublenullables3simf? Spectroscopic chi2 of a fitted triple system (s3_sim_f)stat.fit.chi2doublenullableNstarsp[1/3] Best-fitting photometric configuration (n_stars_p) (1)src.classintNstarsf[1/3] Best-fitting spectroscopic configuration (n_stars_f) (1)src.classintClass[123> i] Final configuration classification (class) (1)src.classcharFlag[0/7] Result quality flags (flag) (2)meta.code.qualint