J/A+A/684/A74ivo://CDS.VizieR/J/A+A/684/A74doi:10.26093/cds/vizier.36840074CDSMerle T.Pourbaix D.Jorissen A.Siopis C.Van Eck S.Van Winckel H.2025-04-16T20:01:18Z2024-04-05T09:19:53ZCDS support team

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

cds-question@unistra.frmultiple-starsspectroscopic-binary-starsorbitsradial-velocityspectroscopystellar-massesThe Gaia mission is delivering a large number of astrometric orbits for binary stars. By combining these with spectroscopic orbits for systems with two observable spectra (SB2), it is possible to derive the masses of both components. However, to get masses with a good accuracy requires accurate spectroscopic orbits, which is the major aim of the present paper. A subsidiary aim is to discover SB2 systems hiding among known SB1, and even though this search may often prove unsuccessful, the acquired radial velocities may be used anyway to improve the existing spectroscopic orbits.New radial velocities for 58 binary systems from the Catalogue of Spectroscopic Binary Orbits (SB9), obtained using the high-resolution HERMES spectrograph installed on the 1.2m Mercator telescope, were used to possibly identify hitherto undetected SB2 systems. For SB1 systems with inaccurate orbits, these new radial-velocity measurements were used to improve the orbital accuracy. This paper provides 51 orbits (41 SB1 and 10 SB2) that have been improved with respect to the solution listed in the SB9 catalogue, out of the 58 SB9 orbits studied, which belong to 56 stellar systems. Among them, there are five triple and four quadruple systems. Despite the high resolution of HERMES, HIP 115142 A is the only system which we detected as a new SB2 system. The B component of the visual binary HIP 92726 has now been found to be a spectroscopic system as well, which makes HIP 92726 a newly discovered quadruple system (SB1+SB1). The high HERMES resolution allowed us moreover to better isolate the signature of the secondary component of HIP 12390, HIP 73182 and HIP 111170. More accurate masses have thus been derived for them. Among the 30 SB also present in Gaia Data Rlease 3 (DR3) and with periods shorter than the Gaia DR3 time span (~1000d), only 5 where flagged as binaries by DR3. Various DR3 selection criteria are responsible for this situation.2024A&A...684A..74Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/684/A74CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)B/sb9 : SB9: 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-)http://sb9.astro.ulb.ac.be : SB9 database home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/684/A74https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/684/A74http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/684/A74https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/684/A74https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/684/A74http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/684/A74GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/684/A74/table1 (Programme stars and the behaviour of their old and new radial velocities with respect to the reference orbital solution, as listed in column Reforb)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/684/A74/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/684/A74/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/684/A74/table1?GETtext/xml+votable180.050000true0.5830294-29.72044140.0055555555555555566/16490 17137 17368 18470 18636 18712 20797 21067 21255 21328 21430 21505 21602 21647 21696 21736 21794 22034 22625 22655 24734 25113 25323 25444 25571 26133 26630 26769 28988 29391 29552 29729 29923 30217 30226 30242 36121 36621 36742 36812 40160 40311 40552 40613 40750 40827 40892 44284 44651 44785 44879 44891 45001 48302 48998https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/684/A74?format=asciidefaultJ/A+A/684/A74/table1Programme stars and the behaviour of their old and new radial velocities with respect to the reference orbital solution, as listed in column ReforbrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVCShow the Radial Velocity curvesmeta.ref.urlcharHIPHIP numbermeta.id;meta.mainintm_HIP[AB] Multiplicity indexmeta.code.multipcharn_HIP[h] Note on HIP (1)meta.notecharSB9SB9 identifiermeta.idintSpTypeSpectral typesrc.spTypecharn_SpTypeNote on spectral type (1)meta.notecharTDR3Type of binary solution provided by Gaia DR3 (Gaia Collaboration et al., 2023, Cat. I/355) (2)meta.notecharSB1/2/cSpecifies whether or not the star has been detected as SB2 (3)meta.code.classcharn_SB1/2/cNote on SB1/2/c (1)meta.notecharMaskMask adopted for the cross correlation (4)meta.id;instrcharNnewNumber of new measurementsmeta.numberintNnew2? Second component number of new measurementsmeta.numberintnullableNold?meta.numberintnullableNold2? Second component number of old measurementsmeta.numberintnullable(O-C)newMean deviation of the residuals of the Hermes RV with respect to the reference orbitstat.fit.residualfloatSimbadSimbad column added by the CDSmeta.ref.urlcharRefOrbReference orbit (6)meta.bibint(O-C)new2? Second component mean deviation of the residuals of the Hermes RV with respect to the reference orbitstat.fit.residualfloatnullablee_(O-C)newStandard deviation of the residuals of the Hermes RV with respect to the reference orbitstat.errorfloate_(O-C)new2? Second component standard deviation of the residuals of the Hermes RV with respect to the reference orbitstat.errorfloatnullablee_(O-C)old? Old mean deviation of the residuals of the Hermes RVstat.errorfloatnullablee_(O-C)old2? Second component old mean deviation of the residuals of the Hermes RVstat.errorfloatnullableRem[R] R means that a revised orbit combining old and new (HERMES) measurements has been computed (5)meta.codecharOldSysOld systemmeta.notecharDeltaRV? Offset RV_HERMES_-RV_SB9_ (see Sect. 2) between the SB9 and HERMES RV zero-pointskm/sphys.veloc;arith.difffloatnullablee_DeltaRV? rms uncertainty on DeltaRVkm/sstat.errorfloatnullablen_e_DeltaRVNote on e_DeltaRV (1)meta.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.mainJ/A+A/684/A74/table2HERMES RVrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPHIPPARCOS numbermeta.id;meta.mainintEpochHeliocentric Julian Date (HJD-2400000)dtime.epochdoubleRVRadial Velocitykm/sphys.veloc;pos.heliocentricfloate_RVUncertainty on Radial Velocitykm/sstat.errorfloatComp[ABabc ] Componentmeta.code.multipchar