J/A+A/635/A8ivo://CDS.VizieR/J/A+A/635/A8doi:10.26093/cds/vizier.36350008CDSCasamiquela L.Tarricq Y.Soubiran C.Blanco-Cuaresma S.Jofre P.,Heiter U.Tucci Maia M.2021-10-18T12:04:49Z2020-02-28T09:06:40ZCDS support team

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

cds-question@unistra.fropen-star-clusterschemical-abundancesWell studied Open Clusters (OCs) of the Solar neighbourhood are frequently used as reference objects to test galactic and stellar theories. For that purpose their chemical composition needs to be known with a high level of confidence. It is also important to clarify if each OC is chemically homogeneous and if it has a unique chemical signature. The aims of this work are (1) to determine accurate and precise abundances of 22 chemical species (from Na to Eu) in the Hyades, Praesepe and Rupecht 147 using a large number of stars at different evolutionary states, (2) to evaluate the level of chemical homogeneity of these OCs, (3) to compare their chemical signatures. We gathered ~800 high resolution and high signal-to-noise spectra of ~100 members in the three clusters, obtained with the latest memberships based on Gaia DR2 data. We build a pipeline which computes atmospheric parameters and strictly line-by-line differential abundances among twin stars in our sample. With this method we are able to reach a very high precision in the abundances (0.01-0.02dex in most of the elements). We find large differences in the absolute abundances in some elements, which can be attributed to diffusion, NLTE effects or systematics in the analysis. For the three OCs, we find strong correlations in the differential abundances between different pairs of elements. According to our experiment with synthetic data, this can be explained by some level of chemical inhomogeneity. We compare differential abundances of several stars from the Hyades and Praesepe tails: the stars that differ more in chemical abundances also have distinct kinematics, even though they have been identified as members of the tail. It is possible to obtain high precision abundances using a differential analysis even when mixing spectra from different instruments. With this technique we find that the Hyades and Preasepe have the same chemical signature when G dwarfs and K giants are considered. Despite a certain level of inhomogeneity in each cluster, it is still possible to clearly distinguish the chemical signature of the older cluster Ruprecht 147 when compared to the Hyades and Praesepe.2020A&A...635A...8Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/635/A8CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/635/A8https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/635/A8http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/635/A8https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/635/A8https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/635/A8http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/635/A8GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/635/A8/tablea1 (Individual abundances of the Gaia Benchmark stars (TableA1 and TableA2 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/635/A8/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/635/A8/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/635/A8/tablea1?GETtext/xml+votable180.050000true243.9052933-8.36943940.005555555555555556Cone search capability for table J/A+A/635/A8/tablea3 (Results of the cluster stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/635/A8/tablea3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/635/A8/tablea3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/635/A8/tablea3?GETtext/xml+votable180.050000true32.846449234821.37734445620.0055555555555555565/7432 6/60 309 322 334 336 341-342 348 373 456 483 712 890 917 1024 1032 1042 1058 1060 1075 2923 3335 4574 4684-4685 4696 4698-4699 4720 6219 8767 13633 15755 17425 17731 23017 23096 23454 23479 23489 23497 23503 23511 23513 23525 23527 23529 23533 23537-23539 23544-23545 23547-23548 24019 24068 24099 24104 24110 24192 24194-24195 24206 24209 24715 26302 26552 26975 29045 29047 30878 35064 36697 41763 42248 48923https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/635/A8?format=asciidefaultJ/A+A/635/A8/table2Line list selectionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaCentral wavelength of the line0.1nmem.wl.central;spect.linedoubleElChemical element with ionization statephys.atmol.element;phys.atmol.ionizationcharEPExcitation potential of the transitioneVphys.atmol.excitation;phys.atmol.transitionfloatloggfOscillator strengthphys.atmol.oscStrengthfloatGroupStar group for which the line was used (1)meta.codecharJ/A+A/635/A8/tablea1Individual abundances of the Gaia Benchmark stars (TableA1 and TableA2 of the paper)SimbadNameSimbad column added by the CDSmeta.idcharnullableStarStar namemeta.id;meta.maincharHIPHipparcos ID (HIPNNNNN)meta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNspecNumber of spectra analyzedmeta.numberint[NaI/H]NaI abundance with respect to the Sunphys.abundfloate_[NaI/H]NaI abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[NaI/H]mMedian of the NaI abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[MgI/H]MgI abundance with respect to the Sunphys.abundfloate_[MgI/H]MgI abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[MgI/H]mMedian of the MgI abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[AlI/H]AlI abundance with respect to the Sunphys.abundfloate_[AlI/H]AlI abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[AlI/H]mMedian of the AlI abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[SiI/H]SiI abundance with respect to the Sunphys.abundfloate_[SiI/H]SiI abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[SiI/H]mMedian of the SiI abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[CaI/H]CaI abundance with respect to the Sunphys.abundfloate_[CaI/H]CaI abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[CaI/H]mMedian of the CaI abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[ScII/H]ScII abundance with respect to the Sunphys.abundfloate_[ScII/H]ScII abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[ScII/H]mMedian of the ScII abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[TiI/H]TiI abundance with respect to the Sunphys.abundfloate_[TiI/H]TiI abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[TiI/H]mMedian of the TiI abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[TiII/H]TiII abundance with respect to the Sunphys.abundfloate_[TiII/H]TiII abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[TiII/H]mMedian of the TiII abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[VI/H]VI abundance with respect to the Sunphys.abundfloate_[VI/H]VI abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[VI/H]mMedian of the VI abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[CrI/H]CrI abundance with respect to the Sunphys.abundfloate_[CrI/H]CrI abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[CrI/H]mMedian of the CrI abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[MnI/H]MnI abundance with respect to the Sunphys.abundfloate_[MnI/H]MnI abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[MnI/H]mMedian of the MnI abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[FeI/H]FeI abundance with respect to the Sunphys.abundfloate_[FeI/H]FeI abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[FeI/H]mMedian of the FeI abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[FeII/H]FeII abundance with respect to the Sunphys.abundfloate_[FeII/H]FeII abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[FeII/H]mMedian of the FeII abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[CoI/H]CoI abundance with respect to the Sunphys.abundfloate_[CoI/H]CoI abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[CoI/H]mMedian of the CoI abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[NiI/H]NiI abundance with respect to the Sunphys.abundfloate_[NiI/H]NiI abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[NiI/H]mMedian of the NiI abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[CuI/H]CuI abundance with respect to the Sunphys.abundfloate_[CuI/H]CuI abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[CuI/H]mMedian of the CuI abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[YII/H]YII abundance with respect to the Sunphys.abundfloate_[YII/H]YII abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[YII/H]mMedian of the YII abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[BaII/H]BaII abundance with respect to the Sunphys.abundfloate_[BaII/H]BaII abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[BaII/H]mMedian of the BaII abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[LaII/H]? LaII abundance with respect to the Sunphys.abundfloatnullablee_[LaII/H]? LaII abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloatnullablee_[LaII/H]m? Median of the LaII abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloatnullable[CeII/H]? CeII abundance with respect to the Sunphys.abundfloatnullablee_[CeII/H]? CeII abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloatnullablee_[CeII/H]m? Median of the CeII abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloatnullable[NdII/H]? NdII abundance with respect to the Sunphys.abundfloatnullablee_[NdII/H]? NdII abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloatnullablee_[NdII/H]m? Median of the NdII abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloatnullable[EuII/H]EuII abundance with respect to the Sunphys.abundfloate_[EuII/H]EuII abundance uncertainty computed as the dispersion among individual spectrastat.error;phys.abundfloate_[EuII/H]mMedian of the EuII abundance uncertainties quoted for the individual spectrastat.error;phys.abundfloat[Fe/H]refReference value of the [Fe/H] abundance (1)phys.abund.Fefloate_[Fe/H]refUncertainty of the reference [Fe/H] abundancestat.error;phys.abund.Fefloat[Ca/H]refReference value of the [Ca/H] abundance (1)phys.abundfloate_[Ca/H]refUncertainty of the reference [Ca/H] abundancestat.errorfloat[Co/H]refReference value of the [Co/H] abundance (1)phys.abundfloate_[Co/H]refUncertainty of the reference [Co/H] abundancestat.errorfloat[Cr/H]refReference value of the [Cr/H] abundance (1)phys.abundfloate_[Cr/H]refUncertainty of the reference [Cr/H] abundancestat.errorfloat[Mg/H]refReference value of the [Mg/H] abundance (1)phys.abundfloate_[Mg/H]refUncertainty of the reference [Mg/H] abundancestat.errorfloat[Mn/H]refReference value of the [Mn/H] abundance (1)phys.abundfloate_[Mn/H]refUncertainty of the reference [Mn/H] abundancestat.errorfloat[Ni/H]refReference value of the [Ni/H] abundance (1)phys.abundfloate_[Ni/H]refUncertainty of the reference [Ni/H] abundancestat.errorfloat[Sc/H]refReference value of the [Sc/H] abundance (1)phys.abundfloate_[Sc/H]refUncertainty of the reference [Sc/H] abundancestat.errorfloat[Si/H]refReference value of the [Si/H] abundance (1)phys.abundfloate_[Si/H]refUncertainty of the reference [Si/H] abundancestat.errorfloat[Ti/H]refReference value of the [Ti/H] abundance (1)phys.abundfloate_[Ti/H]refUncertainty of the reference [Ti/H] abundancestat.errorfloat[V/H]refReference value of the [V/H] abundance (1)phys.abundfloate_[V/H]refUncertainty of the reference [V/H] abundancestat.errorfloatGrouprefReference group (2)meta.codechar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainnullableJ/A+A/635/A8/tablea3Results of the cluster starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2ID of the star (Gaia DR2, source_id)meta.id;meta.mainRA_ICRSRight ascension (ICRS) at Ep=2000.0degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2000.0degpos.eq.dec;meta.mainClusterCluster namemeta.id.parentcharNspec[1/5] Number of spectra analyzedmeta.numberintXX coordinate in the cartesian Galactic framepcpos.cartesian.x;pos.galacticdoubleYY coordinate in the cartesian Galactic framepcpos.cartesian.y;pos.galacticdoubleZZ coordinate in the cartesian Galactic framepcpos.cartesian.z;pos.galacticdoubleUx projection of the total velocitykm/sphys.veloc;pos.cartesian.xdoubleVy projection of the total velocitykm/sphys.veloc;pos.cartesian.ydoubleWz projection of the total velocitykm/sphys.veloc;pos.cartesian.zdoubleRVRadial velocity (vel_atomic)km/sphys.veloc;pos.heliocentricdoublee_RVRadial velocity uncertainty (vel_atomic_err)km/sstat.errordoubleTeffSEffective temperature (synth_teff)Kphys.temperature.effectivefloatloggSSurface gravity (synth_logg)log(cm**2.s**-1)phys.gravityfloat[M/H]SOverall metallicity (synth_MH)phys.abund.ZfloatvmicSMicroturbulent velocity (synth_vmic)km/sphys.velocdoublee_TeffSEffective temperature uncertainty (synth_teff_err)Kstat.errordoublee_loggSSurface gravity uncertainty (synth_logg_err)log(cm**2.s**-1)stat.errordoublee_[M/H]SOverall metallicity uncertainty (synth_MH_err)stat.error;phys.abunddoublee_vmicSMicroturbulent velocity uncertainty (synth_vmic_err)km/sstat.errordouble[AlI/H]Absolute abundance [Al1/H] computed with respect to the Sunphys.abundfloate_[AlI/H]Uncertainty in the [AlI/H] absolute abundancestat.error;phys.abundfloat[BaII/H]? Absolute abundance [BaII/H] computed with respect to the Sunphys.abundfloatnullablee_[BaII/H]? Uncertainty in the [BaII/H] (25) absolute abundancestat.error;phys.abundfloatnullable[CaI/H]? Absolute abundance [CaI/H] computed with respect to the Sunphys.abundfloatnullablee_[CaI/H]? Uncertainty in the [CaI/H] absolute abundancestat.error;phys.abundfloatnullable[CeII/H]? Absolute abundance [CeII/H] computed with respect to the Sunphys.abundfloatnullablee_[CeII/H]? Uncertainty in the [CeII/H] absolute abundancestat.error;phys.abundfloatnullable[CoI/H]? Absolute abundance [CoI/H] computed with respect to the Sunphys.abundfloatnullablee_[CoI/H]? Uncertainty in the [CoI/H] absolute abundancestat.error;phys.abundfloatnullable[CrI/H]? Absolute abundance [CrI/H] computed with respect to the Sunphys.abundfloatnullablee_[CrI/H]? Uncertainty in the [CrI/H] absolute abundancestat.error;phys.abundfloatnullable[CuI/H]? Absolute abundance [CuI/H] computed with respect to the Sunphys.abundfloatnullablee_[CuI/H]? Uncertainty in the [CuI/H] absolute abundancestat.error;phys.abundfloatnullable[EuII/H]? Absolute abundance [EuII/H] computed with respect to the Sunphys.abundfloatnullablee_[EuII/H]? Uncertainty in the [EuII/H] absolute abundancestat.error;phys.abundfloatnullable[FeI/H]? Absolute abundance [FeI/H] computed with respect to the Sunphys.abundfloatnullablee_[FeI/H]? Uncertainty in the [FeI/H] absolute abundancestat.error;phys.abundfloatnullable[FeII/H]? Absolute abundance [FeII/H] computed with respect to the Sunphys.abundfloatnullablee_[FeII/H]? Uncertainty in the [FeII/H] absolute abundancestat.error;phys.abundfloatnullable[MgI/H]Absolute abundance [MgI/H] computed with respect to the Sunphys.abundfloate_[MgI/H]Uncertainty in the [MgI/H] absolute abundancestat.error;phys.abundfloat[MnI/H]? Absolute abundance [MnI/H] computed with respect to the Sunphys.abundfloatnullablee_[MnI/H]? Uncertainty in the [MnI/H] absolute abundancestat.error;phys.abundfloatnullable[NaI/H]? Absolute abundance [NaI/H] computed with respect to the Sunphys.abundfloatnullablee_[NaI/H]? Uncertainty in the [NaI/H] absolute abundancestat.error;phys.abundfloatnullable[NdII/H]? Absolute abundance [NdII/H] computed with respect to the Sunphys.abundfloatnullablee_[NdII/H]? Uncertainty in the [NdII/H] absolute abundancestat.error;phys.abundfloatnullable[NiI/H]? Absolute abundance [NiI/H] computed with respect to the Sunphys.abundfloatnullablee_[NiI/H]? Uncertainty in the [NiI/H] absolute abundancestat.error;phys.abundfloatnullable[ScII/H]? Absolute abundance [ScII/H] computed with respect to the Sunphys.abundfloatnullablee_[ScII/H]? Uncertainty in the [ScII/H] absolute abundancestat.error;phys.abundfloatnullable[SiI/H]? Absolute abundance [SiI/H] computed with respect to the Sunphys.abundfloatnullablee_[SiI/H]? Uncertainty in the [SiI/H] absolute abundancestat.error;phys.abundfloatnullable[TiI/H]? Absolute abundance [TiI/H] computed with respect to the Sunphys.abundfloatnullablee_[TiI/H]? Uncertainty in the [TiI/H] absolute abundancestat.error;phys.abundfloatnullable[TiII/H]? Absolute abundance [TiII/H] computed with respect to the Sunphys.abundfloatnullablee_[TiII/H]? Uncertainty in the [TiII/H] absolute abundancestat.error;phys.abundfloatnullable[VI/H]? Absolute abundance [VI/H] computed with respect to the Sunphys.abundfloatnullablee_[VI/H]? Uncertainty in the [VI/H] absolute abundancestat.error;phys.abundfloatnullable[YII/H]? Absolute abundance [YII/H] computed with respect to the Sunphys.abundfloatnullablee_[YII/H]? Uncertainty in the [YII/H] absolute abundancestat.error;phys.abundfloatnullabledifAlI? Differential abundance of AlI computed with respect to the reference starphys.abund;arith.difffloatnullablee_difAlI? Uncertainty in the AlI differential abundancestat.errordoublenullabledifBaII? Differential abundance of BaII computed with respect to the reference starphys.abund;arith.difffloatnullablee_difBaII? Uncertainty in the BaII differential abundancestat.errordoublenullabledifCaI? Differential abundance of CaI computed with respect to the reference starphys.abund;arith.difffloatnullablee_difCaI? Uncertainty in the CaI differential abundancestat.errordoublenullabledifCeII? Differential abundance of CeII computed with respect to the reference starphys.abund;arith.difffloatnullablee_difCeII? Uncertainty in the CeII differential abundancestat.errordoublenullabledifCoI? Differential abundance of CoI computed with respect to the reference starphys.abund;arith.difffloatnullablee_difCoI? Uncertainty in the CoI differential abundancestat.errordoublenullabledifCrI? Differential abundance of CrI computed with respect to the reference starphys.abund;arith.difffloatnullablee_difCrI? Uncertainty in the CrI differential abundancestat.errordoublenullabledifCuI? Differential abundance of CuI computed with respect to the reference starphys.abund;arith.difffloatnullablee_difCuI? Uncertainty in the CuI differential abundancestat.errordoublenullabledifEuII? Differential abundance of EuII computed with respect to the reference starphys.abund;arith.difffloatnullablee_difEuII? Uncertainty in the EuII differential abundancestat.errordoublenullabledifFeI? Differential abundance of FeI computed with respect to the reference starphys.abund;arith.difffloatnullablee_difFeI? Uncertainty in the FeI differential abundancestat.errordoublenullabledifFeII? Differential abundance of FeII computed with respect to the reference starphys.abund;arith.difffloatnullablee_difFeII? Uncertainty in the FeII differential abundancestat.errordoublenullabledifLaII? Differential abundance of LaII computed with respect to the reference starphys.abund;arith.difffloatnullablee_difLaII? Uncertainty in the LaII differential abundancestat.errordoublenullabledifMgI? Differential abundance of MgI computed with respect to the reference starphys.abund;arith.difffloatnullablee_difMgI? Uncertainty in the MgI differential abundancestat.errordoublenullabledifMnI? Differential abundance of MnI computed with respect to the reference starphys.abund;arith.difffloatnullablee_difMnI? Uncertainty in the MnI differential abundancestat.errordoublenullabledifNaI? Differential abundance of NaI computed with respect to the reference starphys.abund;arith.difffloatnullablee_difNaI? Uncertainty in the NaI differential abundancestat.errordoublenullabledifNdII? Differential abundance of NdII computed with respect to the reference starphys.abund;arith.difffloatnullablee_difNdII? Uncertainty in the NdII differential abundancestat.errordoublenullabledifNiI? Differential abundance of NiI computed with respect to the reference starphys.abund;arith.difffloatnullablee_difNiI? Uncertainty in the NiI differential abundancestat.errordoublenullabledifScII? Differential abundance of ScII computed with respect to the reference starphys.abund;arith.difffloatnullablee_difScII? Uncertainty in the ScII differential abundancestat.errordoublenullabledifSiI? Differential abundance of SiI computed with respect to the reference starphys.abund;arith.difffloatnullablee_difSiI? Uncertainty in the SiI differential abundancestat.errordoublenullabledifTiI? Differential abundance of TiI computed with respect to the reference starphys.abund;arith.difffloatnullablee_difTiI? Uncertainty in the TiI differential abundancestat.errordoublenullabledifTiII? Differential abundance of TiII computed with respect to the reference starphys.abund;arith.difffloatnullablee_difTiII? Uncertainty in the TiII differential abundancestat.errordoublenullabledifVI? Differential abundance of VI computed with respect to the reference starphys.abund;arith.difffloatnullablee_difVI? Uncertainty in the VI differential abundancestat.errordoublenullabledifYII? Differential abundance of YII computed with respect to the reference starphys.abund;arith.difffloatnullablee_difYII? Uncertainty in the YII differential abundancestat.errordoublenullableFlag[OETR] Flag (1)meta.code.errorcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RA.icrsRight ascension (ICRS) at Epoch=J2000. (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=J2000. (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.decnullableindexed