Chemical abundances of zeta ReticuliJ/A+A/591/A34ivo://CDS.VizieR/J/A+A/591/A34doi:10.26093/cds/vizier.35910034CDSAdibekyan V.Delgado-Mena E.Figueira P.Sousa S.G.Santos N.C.,Faria J.P.Gonzalez Hernandez J.I.Israelian G.Harutyunyan G.,Suarez-Andres L.Hakobyan A.A.2023-12-21T16:07:11Z2016-06-07T09:09:24ZCDS support teamCDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, Francecds-question@unistra.frmultiple-starssolar-system-planetschemical-abundancesSeveral studies have reported a correlation between the chemical abundances of stars and condensation temperature (known as Tc trend). Very recently, a strong Tc trend was reported for the zeta Reticuli binary system, which consists of two solar analogs. The observed trend in zeta^2^ Ret relative to its companion was explained by the presence of a debris disk around zeta^2^ Ret. Our goal is to re-evaluate the presence and variability of the Tc trend in the zeta Reticuli system and to understand the impact of the presence of the debris disk on a star. We used very high-quality spectra of the two stars retrieved from the HARPS archive to derive very precise stellar parameters and chemical abundances. We derived the stellar parameters with the classical (nondifferential) method, while we applied a differential line-by-line analysis to achieve the highest possible precision in abundances, which are fundamental to explore for very tiny differences in the abundances between the stars. We confirm that the abundance difference between zeta^2^ Ret and zeta^1^ Ret shows a significant (~2{sigma}) correlation with Tc. However, we also find that the Tc trends depend on the individual spectrum used (even if always of very high quality). In particular, we find significant but varying differences in the abundances of the same star from different individual high-quality spectra. Our results for the zeta Reticuli system show, for example, that nonphysical factors, such as the quality of spectra employed and errors that are not accounted for, can be at the root of the Tc trends for the case of individual spectra.2016A&A...591A..34Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/591/A34CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/588/A81 : Line list and abundances of the binary zet2 Ret (Saffe+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/591/A34https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/591/A34http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/591/A34https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/591/A34https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/591/A34http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/591/A34GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefault
J/A+A/591/A34/table1Stellar parameters, S/N, and observation dates of zeta^1^ Ret and zeta^2^ Ret derived from individual and combined spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar's identifier/spectrummeta.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.FefloatVturTurbulent velocitykm/sphys.velocfloate_Vturrms uncertainty on Vturkm/sstat.errorfloatS/NSignal-to-noise ratiostat.snrintObs.dateObservation date (YYYY-MM-DDThh:mm:ss.sss)time.epoch;obschar
J/A+A/591/A34/ewEWs of the spectral lines used to deriverecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar's identifier/spectrummeta.id;meta.maincharlambdaCentral wavelength0.1nmem.wl.centralfloatElemElement numbermeta.idfloatEWEquivalent width of the line0.1pmspect.line.eqWidthfloat
J/A+A/591/A34/s_linesLine list of S (6046.0, 6052.5, 6743.5, and 6757.1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaCentral wavelength0.1nmem.wl.centraldoubleElemElement numbermeta.id;meta.mainfloatEPExcitation potentialeVphys.atmol.excitationfloatloggfOscillator strengthphys.atmol.oscStrengthfloatDE? Dissociation energy of moleculeseVphys.energy;phys.mol.dissociationnullable