J/MNRAS/492/1164ivo://CDS.VizieR/J/MNRAS/492/1164doi:10.26093/cds/vizier.74921164CDSHawkins K.Lucey M.Ting Y.-S.Ji A.Katzberg D.Thompson M.,El-Badry K.Teske J.Nelson T.Carrillo A.2024-08-20T20:15:21Z2020-05-25T09:46:44ZCDS support team

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

cds-question@unistra.frmultiple-starschemical-abundanceseffective-temperaturevisible-astronomyspectroscopyOne of the high-level goals of Galactic archaeology is chemical tagging of stars across the Milky Way to piece together its assembly history. For this to work, stars born together must be uniquely chemically homogeneous. Wide binary systems are an important laboratory to test this underlying assumption. Here we present the detailed chemical abundance patterns of 50 stars across 25 wide binary systems comprised of main-sequence stars of similar spectral type identified in Gaia DR2 with the aim of quantifying their level of chemical homogeneity. Using high-resolution spectra obtained with McDonald Observatory, we derive stellar atmospheric parameters and precise detailed chemical abundances for light/odd-Z (Li, C, Na, Al, Sc, V, Cu), alpha (Mg, Si, Ca), Fe-peak (Ti, Cr, Mn, Fe, Co, Ni, Zn), and neutron capture (Sr, Y, Zr, Ba, La, Nd, Eu) elements. Results indicate that 80% (20 pairs) of the systems are homogeneous in [Fe/H] at levels below 0.02dex. These systems are also chemically homogeneous in all elemental abundances studied, with offsets and dispersions consistent with measurement uncertainties. We also find that wide binary systems are far more chemically homogeneous than random pairings of field stars of similar spectral type. These results indicate that wide binary systems tend to be chemically homogeneous but in some cases they can differ in their detailed elemental abundances at a level of [X/H]~0.10dex, overall implying chemical tagging in broad strokes can work.2020MNRAS.492.1164Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/492/1164CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/AJ/157/78 : Double + multiple star systems from GaiaDR2https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/492/1164https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/492/1164http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/492/1164https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/492/1164https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/492/1164http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/492/1164GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/492/1164/table1 (Observational properties of wide binary systems)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/1164/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/1164/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/1164/table1?GETtext/xml+votable180.050000true140.665950.60390.0055555555555555566/1560 1654 1692 1932 3133 3398 4917 5230 6496 7240 10292 17717 18229 18278 18284 22005 22526-22527 22955 23366 24100 25500 25898 27646 28244-28245 285981.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/492/1164?format=asciiOpticaldefaultJ/MNRAS/492/1164/table1Observational properties of wide binary systemsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2Gaia DR2 source identifiermeta.idRA_ICRSRight ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainNameAssociated wide binary component namemeta.id;meta.maincharRVRadial velocity measured in our optical spectrakm/sphys.veloc;pos.heliocentricfloate_RVrms uncertainty on RVkm/sstat.errorfloatSNRSNR, measured in at the continuum level at ~5350{AA}, of our optical spectrapixel**-1stat.snrintPlxGaia DR2 parallaxmaspos.parallaxfloatpmRA*Gaia DR2 proper motion in RA, pmRA*cosDEmas/yrpos.pm;pos.eq.rafloatpmDEGaia DR2 proper motion in DEmas/yrpos.pm;pos.eq.decfloatGmagGaia DR2 G magnitudemagphot.mag;em.optfloatBP-RPGaia DR2 BP-RP colour indexmagphot.color;em.opt.B;em.opt.RfloatTeffphPhotometric effective temperature (Andrae et al., 2018A&A...616A...8A)Kphys.temperature.effectiveintSimbadSimbad column added by the CDSmeta.ref.urlchar_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decnullableindexedJ/MNRAS/492/1164/table3Stellar parameter and chemical abundance ratios of observed wide binary systemrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDetailsmeta.ref.urlcharGaiaDR2Gaia DR2 Source IDmeta.idNameAssociated wide binary component namemeta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveinte_Teffrms uncertainty on TeffKstat.error;phys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloate_loggrms uncertainty on logglog(cm.s**-2)stat.errorfloat[Fe/H]Metallicityphys.abund.Zfloate_[Fe/H]rms uncertainty on [Fe/H]stat.error;phys.abund.FefloatvmicroMicro-turbulent velocitykm/sphys.veloc.microTurbfloate_vmicrorms uncertainty on vmicrokm/sstat.errorfloat[Li/H]? Abundance [Li/H]phys.abundfloatnullablee_[Li/H]? Error on [Li/H]stat.error;phys.abundfloatnullablee_[Li/H]tot? Total error on [Li/H]stat.error;phys.abundfloatnullableo_[Li/H]? Number of line for [Li/H]meta.numberfloatnullable[C/H]Abundance [C/H]phys.abundfloate_[C/H]Error on [C/H]stat.error;phys.abundfloate_[C/H]totTotal error on [C/H]stat.error;phys.abundfloato_[C/H]Number of line for [C/H]meta.numberfloat[Na/H]Abundance [Na/H]phys.abundfloate_[Na/H]Error on [Na/H]stat.error;phys.abundfloate_[Na/H]totTotal error on [Na/H]stat.error;phys.abundfloato_[Na/H]Number of line for [Na/H]meta.numberfloat[Mg/H]Abundance [Mg/H]phys.abundfloate_[Mg/H]Error on [Mg/H]stat.error;phys.abundfloate_[Mg/H]totTotal error on [Mg/H]stat.error;phys.abundfloato_[Mg/H]Number of line for [Mg/H]meta.numberfloat[Al/H]? Abundance [Al/H]phys.abundfloatnullablee_[Al/H]? Error on [Al/H]stat.error;phys.abundfloatnullablee_[Al/H]tot? Total error on [Al/H]stat.error;phys.abundfloatnullableo_[Al/H]? Number of line for [Al/H]meta.numberfloatnullable[Si/H]Abundance [Si/H]phys.abundfloate_[Si/H]Error on [Si/H]stat.error;phys.abundfloate_[Si/H]totTotal error on [Si/H]stat.error;phys.abundfloato_[Si/H]Number of line for [Si/H]meta.numberfloat[Ca/H]Abundance [Ca/H]phys.abundfloate_[Ca/H]Error on [Ca/H]stat.error;phys.abundfloate_[Ca/H]totTotal error on [Ca/H]stat.error;phys.abundfloato_[Ca/H]Number of line for [Ca/H]meta.numberfloat[Sc/H]Abundance [Sc/H]phys.abundfloate_[Sc/H]Error on [Sc/H]stat.error;phys.abundfloate_[Sc/H]totTotal error on [Sc/H]stat.error;phys.abundfloato_[Sc/H]Number of line for [Sc/H]meta.numberfloat[Ti/H]Abundance [Ti/H]phys.abundfloate_[Ti/H]Error on [Ti/H]stat.error;phys.abundfloate_[Ti/H]totTotal error on [Ti/H]stat.error;phys.abundfloato_[Ti/H]Number of line for [Ti/H]meta.numberfloat[V/H]? Abundance [V/H]phys.abundfloatnullablee_[V/H]? Error on [V/H]stat.error;phys.abundfloatnullablee_[V/H]tot? Total error on [V/H]stat.error;phys.abundfloatnullableo_[V/H]? Number of line for [V/H]meta.numberfloatnullable[Cr/H]Abundance [Cr/H]phys.abundfloate_[Cr/H]Error on [Cr/H]stat.error;phys.abundfloate_[Cr/H]totTotal error on [Cr/H]stat.error;phys.abundfloato_[Cr/H]Number of line for [Cr/H]meta.numberfloat[Mn/H]Abundance [Mn/H]phys.abundfloate_[Mn/H]Error on [Mn/H]stat.error;phys.abundfloate_[Mn/H]totTotal error on [Mn/H]stat.error;phys.abundfloato_[Mn/H]Number of line for [Mn/H]meta.numberfloate_[Fe/H]totTotal error on [Fe/H]stat.error;phys.abund.Fefloato_[Fe/H]Number of line for [Fe/H]meta.numberfloat[Co/H]? Abundance [Co/H]phys.abundfloatnullablee_[Co/H]? Error on [Co/H]stat.error;phys.abundfloatnullablee_[Co/H]tot? Total error on [Co/H]stat.error;phys.abundfloatnullableo_[Co/H]? Number of line for [Co/H]meta.numberfloatnullable[Ni/H]Abundance [Ni/H]phys.abundfloate_[Ni/H]Error on [Ni/H]stat.error;phys.abundfloate_[Ni/H]totTotal error on [Ni/H]stat.error;phys.abundfloato_[Ni/H]Number of line for [Ni/H]meta.numberfloat[Cu/H]Abundance [Cu/H]phys.abundfloate_[Cu/H]Error on [Cu/H]stat.error;phys.abundfloate_[Cu/H]totTotal error on [Cu/H]stat.error;phys.abundfloato_[Cu/H]Number of line for [Cu/H]meta.numberfloat[Zn/H]? Abundance [Zn/H]phys.abundfloatnullablee_[Zn/H]? Error on [Zn/H]stat.error;phys.abundfloatnullablee_[Zn/H]tot? Total error on [Zn/H]stat.error;phys.abundfloatnullableo_[Zn/H]? Number of line for [Zn/H]meta.numberfloatnullable[Sr/H]? Abundance [Sr/H]phys.abundfloatnullablee_[Sr/H]? Error on [Sr/H]stat.error;phys.abundfloatnullablee_[Sr/H]tot? Total error on [Sr/H]stat.error;phys.abundfloatnullableo_[Sr/H]? Number of line for [Sr/H]meta.numberfloatnullable[Y/H]Abundance [Y/H]phys.abundfloate_[Y/H]Error on [Y/H]stat.error;phys.abundfloate_[Y/H]totTotal error on [Y/H]stat.error;phys.abundfloato_[Y/H]Number of line for [Y/H]meta.numberfloat[Zr/H]? Abundance [Zr/H]phys.abundfloatnullablee_[Zr/H]? Error on [Zr/H]stat.error;phys.abundfloatnullablee_[Zr/H]tot? Total error on [Zr/H]stat.error;phys.abundfloatnullableo_[Zr/H]? Number of line for [Zr/H]meta.numberfloatnullable[Ba/H]Abundance [Ba/H]phys.abundfloate_[Ba/H]Error on [Ba/H]stat.error;phys.abundfloate_[Ba/H]totTotal error on [Ba/H]stat.error;phys.abundfloato_[Ba/H]Number of line for [Ba/H]meta.numberfloat[La/H]? Abundance [La/H]phys.abundfloatnullablee_[La/H]? Error on [La/H]stat.error;phys.abundfloatnullablee_[La/H]tot? Total error on [La/H]stat.error;phys.abundfloatnullableo_[La/H]? Number of line for [La/H]meta.numberfloatnullable[Nd/H]? Abundance [Nd/H]phys.abundfloatnullablee_[Nd/H]? Error on [Nd/H]stat.error;phys.abundfloatnullablee_[Nd/H]tot? Total error on [Nd/H]stat.error;phys.abundfloatnullableo_[Nd/H]? Number of line for [Nd/H]meta.numberfloatnullable[Eu/H]? Abundance [Eu/H]phys.abundfloatnullablee_[Eu/H]? Error on [Eu/H]stat.error;phys.abundfloatnullablee_[Eu/H]tot? Total error on [Eu/H]stat.error;phys.abundfloatnullableo_[Eu/H]? Number of line for [Eu/H]meta.numberfloatnullableRandomPairThe assigned random pairmeta.notecharJ/MNRAS/492/1164/tablea1Line-by-line abundance informationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameWide binary component namemeta.id;meta.maincharElElementphys.atmol.elementcharlambdaWavelengthem.wlfloatloggfOscillator Strengthphys.atmol.oscStrengthfloatr_loggfReference for loggfmeta.ref;pos.framecharEPExcitation PotentialeVphys.atmol.excitationfloatlogepsAbundancephys.abundfloat