J/A+A/697/A98ivo://CDS.VizieR/J/A+A/697/A98doi:10.26093/cds/vizier/bc-ns/ljiCDSBenitez-Palacios D.UzundagM.VuckovicM.Arancibia-Rojas E.,Duran-Reyes A.Vos J.Bobrick A.Zorotovic M.Jones M.I.2026-07-03T06:37:06Z2025-05-08T19:37:56ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starsgiant-starsradial-velocityBinary hot subdwarf B (sdB) stars are typically produced from low-mass red giant branch (RGB) stars that have lost almost all their envelopes through binary mass transfer while still fusing helium in their cores. Particularly, when a low-mass red giant enters stable Roche lobe overflow (RLOF) mass transfer near the tip of the RGB, a long-period sdB binary may be formed. We aim to extend our previous volume-limited sample of 211 stars within 200pc, a homogeneous sample of low-mass red giants, predicted progenitors of wide sdB binaries, to 500pc and validate it. Additionally, our goal is to provide the distribution of stellar parameters for these stars. We refined our original 500pc sample by incorporating Gaia DR3 parallax values and interstellar extinction measurements. Next, we collected multi-epoch high-resolution spectra for 230 stars in the volume-limited sample using the CORALIE echelle spectrograph from 2019 to 2023. To confirm or discard binarity, we combined astrometric parameters from Gaia with the resulting radial velocity variations. We derived the distribution of stellar parameters using evolutionary models and employed the equivalent evolutionary phase to verify the evolutionary stage of the stars in our sample. Finally, we compared our stellar parameters with the literature. The derived stellar parameters confirmed that 82% of stars in our sample are indeed in the RGB phase, while 18% are red clump (RC) contaminants. This was expected due to the overlapping of RGB and RC stars in the colour-magnitude diagram. Additionally, 75% of the confirmed RGB stars have a high probability of being part of a binary system. Comparison with the literature shows good overall agreement with a scatter <~15% in stellar parameters, while the masses show somewhat higher dispersion (~20%). We have obtained the most complete volume-limited sample of binary RGB star candidates within 500 pc. These systems are likely progenitors of hot subdwarfs and other classes of stripped helium stars.2025A&A...697A..98Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/697/A98CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)I/357 : Gaia DR3 Part 3. Non-single stars (Gaia Collaboration, 2022)J/A+A/647/A157 : Stellar parameters of the EXPRESS sample (Soto+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/697/A98https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/697/A98http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/697/A98https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/697/A98https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/697/A98http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/697/A98GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/697/A98/tablec1 (Radial velocity measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/697/A98/tablec1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/697/A98/tablec1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/697/A98/tablec1?GETtext/xml+votable180.050000true322.1808363-21.807179760.005555555555555556Cone search capability for table J/A+A/697/A98/tabled1 (Potential new RGB+MS binaries found in Gaia DR3 NSS catalogue with measured orbital parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/697/A98/tabled1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/697/A98/tabled1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/697/A98/tabled1?GETtext/xml+votable180.050000true132.67384964.0217780430.005555555555555556Cone search capability for table J/A+A/697/A98/tabled2 (Potential new RGB+MS binaries found in Gaia DR3 NSS catalogue with no measured orbital parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/697/A98/tabled2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/697/A98/tabled2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/697/A98/tabled2?GETtext/xml+votable180.050000true24.564305812.379200990.005555555555555556Cone search capability for table J/A+A/697/A98/tablee1 (SPECIES results for stars observed with CORALIE)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/697/A98/tablee1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/697/A98/tablee1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/697/A98/tablee1?GETtext/xml+votable180.050000true200.9671435-49.822810850.0055555555555555566/577 582 1495 1509 1803 1896 1997 2012 2308 2810 3863 3930-3931 3996 4131 4593 4597-4598 4749 4766 4885 4954 5099 5110 5132 5605 5823 5829 5868 6071 6535 6546 6604 6665 6722 6859 7060 7106 7575 7647 7692 7948 7978 7985-7986 8101 8533 8674 8781 8851 8864 8883 8970 8990 9036 9706 11337 11341 11523 11780 11793 11858 11869 11887 11898 12215 12229-12230 12376 12379 12454 12470 12525 12890-12891 13260 13597 13647 13767 14994 15005 15012 15055 15168-15169 15234 15607 15922 15993 16014 16018 16160 16252 16330 16442 16581 16600 16657 16664 16729 16801 16889 16903 17125-17126 17248 17280 17348 17395 17402 17425 17435 17478 17595 17602 17608 18163 18312 18315 18334 18338 18343 18373 18728 18748 18974 19135 19145 19477 19555 19638 19642 19655 19702 19707 19881 20228 20443 21776-21777 21849 21866 22386 22533 22539 22546 22683 22734 23048 23307 23315 24722 24729 24768 24980 25009 25029 25059 25284 25343 25476 25488-25489 25492 25644 25741 25786 26071 26407 26453 26713 26910 26991 27002 27025 27299 28103 29143 29280 29789 29793 30018 30027 30145 30344 30374 30381 31097 31142 31146 31163 31199 31204 31382 31429 31490 31728 31986 32078 32122 32159 32859 33072 33134 33336 33364 33378 33654 33843 33877 33884 34081 34090 34103 34117 34446 34483 34529-34530 34538 34546 34738 34748 34791 34794 34906 34968 34983-34984 35351 35399 35425 35507-35508 35510 35597 35602 35620 35674 35680 35714 35717 35774 35873 35877 35909 35958 36269 36570 36657 37002 37010 37335 37528 37542 37958 37962 37983 38004 38600 38621 38753 38765 38870 38913 38921 39654 39760 40039 40042 40084 40160 40207 40287 40291 40560 40786 40794 40845 41040 41090 41221 41250 41276 41284 41710 42309 42633 43218 43393 43423 43433 43503 43698 43704 43709 43793 43826 43929 43936 44025 44286 44728 44739 44770 44794 45039 45131 45143 45163 45169 45244 45325 45329 45342 45400 45417 45607 45682 45693 45750 45761 45782 45800 45882 45991 46012 46014 46036 46076 46088 46186-46187 46359 46381 46383 46417 46421 46528 46609 46655 46724 46877 47063 47067 47174 47178 47199 47217 47221 47224 47276 47281 47313 47317 47367 47471 47481 47492 47549 47581-47582 47588 47634 47645-47646 47701 47737 47765 47798 47896 47960 47966-47967 48098 48201 48207 48214 48221 48228 48258 48279 48362 48519 48523 48553 48560 48596 48682 48713 48717 48744 48815 48834 48913-48914 48980 49030 49039 49042https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/697/A98?format=asciidefaultJ/A+A/697/A98/tablec1Radial velocity measurementsSimbadNameSimbad column added by the CDSmeta.idcharnullableStarStar identification from SIMBADmeta.id;meta.maincharRAJ2000Right Ascension, J2000degpos.eq.ra;meta.mainDEJ2000Declination, J2000degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date (JD-2450000)dtime.epochdoubleS/NSignal-to-noise ratiostat.snrintRVRadial velocitykm/sphys.veloc;pos.heliocentricdoublee_RVRadial velocity errorkm/sstat.errorfloatmaxdeltaRV? Maximun radial velocity differencekm/sphys.veloc;arith.diffdoublenullableRUWE? Renormalized unit wight error (1)stat.errorfloatnullableAEN? Astrometric excess noise (1)masstat.fit.paramfloatnullableCategory[1/3]? Category (2)meta.noteintnullableJ/A+A/697/A98/tabled1Potential new RGB+MS binaries found in Gaia DR3 NSS catalogue with measured orbital parametersTpTime of periastron (3)dsrc.orbital.periastrondoublee_TpTime of periastron error (3)dstat.errordoubleeccOrbital eccentricity (3)src.orbital.eccentricitydoublee_ecc? Orbital eccentricity error (3)stat.errordoublenullableSimbadSimbad column added by the CDSmeta.ref.urlcharSolTypeSolution type (2)meta.codecharPerOrbital period (3)dtime.perioddoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar identification from SIMBADmeta.id;meta.maincharRAJ2000Right Ascension, J2000degpos.eq.ra;meta.mainDEJ2000Declination, J2000degpos.eq.dec;meta.mainRUWERenormalized unit wight error (1)stat.errorfloatAENAstrometric excess noise (1)masstat.fit.paramfloate_PerOrbital period error (3)dstat.errordoubleJ/A+A/697/A98/tabled2Potential new RGB+MS binaries found in Gaia DR3 NSS catalogue with no measured orbital parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSimbadSimbad column added by the CDSmeta.ref.urlcharStarStar identification from SIMBADmeta.id;meta.maincharRAJ2000Right Ascension, J2000degpos.eq.ra;meta.mainDEJ2000Declination, J2000degpos.eq.dec;meta.mainRUWERenormalized unit wight error (1)stat.errorfloatAENAstrometric excess noise (1)masstat.fit.paramfloatSolTypeSolution type (2)meta.codecharJ/A+A/697/A98/tablee1SPECIES results for stars observed with CORALIEAgeStellar ageGyrtime.agefloatSimbadNameSimbad column added by the CDSmeta.idcharnullableProbHBProbability of being on the Horizontal Branchstat.fit.goodnessfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar identification from SIMBADmeta.id;meta.maincharRAJ2000Right Ascension, J2000degpos.eq.ra;meta.mainDEJ2000Declination, J2000degpos.eq.dec;meta.mainS/NSignal-to-noise ratiostat.snrintTeffEffective temperatureKphys.temperature.effectiveinte_TeffEffective temperature errorKstat.error;phys.temperature.effectiveintloggLogarithm of surface gravitylog(cm.s**-2)phys.gravityfloate_loggLogarithm of surface gravity errorlog(cm.s**-2)stat.errorfloat[Fe/H]Iron abundancephys.abund.Fefloate_[Fe/H]Iron abundance errorstat.error;phys.abund.FefloatVmicMicroturbulent velocitykm/sphys.velocfloate_VmicMicroturbulent velocity errorkm/sstat.errorfloatVmacMacroturbulent velocitykm/sphys.velocfloate_VmacMacroturbulent velocity errorkm/sstat.errorfloatvsiniProjected rotational velocitykm/sphys.veloc.rotatfloate_vsiniProjected rotational velocity errorkm/sstat.error;phys.veloc.rotatfloatMassStellar masssolMassphys.massfloatE_MassStellar mass upper errorsolMassstat.error;stat.maxfloate_MassStellar mass lower errorsolMassstat.error;phys.massfloatRadiusStellar radiussolRadphys.angSize;srcfloatE_RadiusStellar radius upper errorsolRadstat.error;stat.maxfloate_RadiusStellar radius lower errorsolRadstat.error;phys.size.radiusfloatlogLLogarithm of stellar luminositylog(solLum)phys.luminosityfloatE_logLUpper error of the logarithm of stellar luminositylog(solLum)stat.error;stat.maxfloate_logLLower error of the logarithm of stellar luminositylog(solLum)stat.errorfloatE_AgeStellar age upper errorGyrstat.error;stat.maxfloate_AgeStellar age lower errorGyrstat.error;time.agefloatEEPEquivalent evolutionary phase (1)src.classfloatE_EEPEquivalent evolutionary phase upper errorstat.error;stat.maxfloate_EEPEquivalent evolutionary phase lower errorstat.errorfloatProbMSProbability of being on the Main Sequencestat.fit.goodnessintProbRGBProbability of being on the Red Gaint Branchstat.fit.goodnessfloat