J/A+A/633/A38ivo://CDS.VizieR/J/A+A/633/A38doi:10.26093/cds/vizier.36330038CDSD'OraziV.OlivaE.BragagliaA.Frasca A.Sanna N.Biazzo K.,Casali G.Desidera S.Lucatello S.Magrini L.Origlia L.2020-04-09T08:21:26Z2020-01-09T08:42:43ZCDS support team

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

cds-question@unistra.fropen-star-clustersg-starsline-intensitieschemical-abundancesOpen clusters exquisitely track the Galactic disc chemical properties and its time evolution; a substantial number of studies and large spectroscopic surveys focus mostly on the chemical content of relatively old clusters (age>1Gyr). Interestingly, the less studied young counterpart populating the solar surrounding has been found to be solar (at most), with a notable surprising lack of young metal-rich objects. While there is wide consensus about the moderately above-solar composition of the Hyades cluster, the metallicity of Praesepe is still controversial. Recent studies suggest that these two clusters share identical chemical composition and age, but this conclusion is disputed. With the aim of reassessing the metallicity of Praesepe, and its difference (if any) with the Hyades cluster, we present in this paper a spectroscopic investigation of ten solar-type dwarf members. We exploited GIARPS at the TNG to acquire high-resolution, high-quality optical and near-IR spectra and derived stellar parameters, metallicity ([Fe/H]), light elements, alpha- and iron-peak elements, by using a strictly differential (line-by-line) approach. We also analysed in the very same way the solar spectrum and the Hyades solar analogue HD 28099. Our findings suggest that Praesepe is more metal-rich than the Hyades, at the level of [Fe/H]=+0.05+/-0.01dex, with a mean value of [Fe/H]=+0.21+/-0.01dex. All the other elements scale with iron, as expected. This result seems to reject the hypothesis of a common origin for these two open clusters. Most importantly, Praesepe is currently the most metal-rich, young open cluster living in the solar neighbourhood2020A&A...633A..38Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/633/A38CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/628/A66 : alpha Persei, Pleiades and Praesepe clusters (Lodieu+, 2019)J/AJ/132/1517 : Spectroscopy of M dwarfs in Praesepe (Kafka+, 2006)J/ApJ/784/57 : Photometry and proper motions in Praesepe (Wang+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/633/A38https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/633/A38http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/633/A38https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/633/A38https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/633/A38http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/633/A38GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/633/A38/stars (Basic information, atmospheric parameters and [Fe/H] abundances for 10 stars (Tables 1+5))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/633/A38/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/633/A38/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/633/A38/stars?GETtext/xml+votable180.050000true130.63416719.3961940.0055555555555555566/4687 4698 4700 4710 47228.650015785639275e-20 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/633/A38?format=asciidefaultJ/A+A/633/A38/starsBasic information, atmospheric parameters and [Fe/H] abundances for 10 stars (Tables 1+5)SimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEWDisplay the equivalent widthsmeta.ref.urlcharStarName of the stars (N2632-NN)meta.id;meta.maincharSNameSimbad identifiermeta.idcharRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainGmagMagnitude G from Gaiamagphot.mag;em.optfloatJmagMagnitude J form 2MASSmagphot.mag;em.IR.JfloatHmagMagnitude H form 2MASSmagphot.mag;em.IR.HfloatKmagMagnitude Ks form 2MASSmagphot.mag;em.IR.KfloatRVRadial velocity from this studykm/sphys.veloc;pos.heliocentricfloate_RVError on the mean radial velocitykm/sstat.errorfloatTeffEffective temperatureKphys.temperature.effectiveinte_TeffError on spectroscopic TeffKstat.error;phys.temperature.effectiveintloggSurface gravity (logg)log(cm.s**-2)phys.gravityfloate_loggError on spectroscopic logglog(cm.s**-2)stat.errorfloatVtMicroturbulence velocitykm/sphys.veloc.microTurbfloate_VtError on Vtkm/sstat.errorfloat[Fe/H]IAbundance [Fe/H] from Fe I linesphys.abund.Fefloate1_[Fe/H]IError on [Fe/H]I due to EWstat.error;spect.line.eqWidth;em.opt.Ifloate2_[Fe/H]IError on [Fe/H]I due to stellar parametersstat.error;phys.abundfloat[Fe/H]IIAbundance [Fe/H] from Fe I linesphys.abund.Fefloate1_[Fe/H]IIError on [Fe/H]II due to EWstat.error;spect.line.eqWidthfloate2_[Fe/H]IIError on [Fe/H]II due to stellar parametersstat.errorfloatJ/A+A/633/A38/table2EW measurements for our starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength0.1nmem.wlfloatSpeciesAtomic number (Z)meta.id;meta.mainfloatEW-star6? Equivalent width for star 60.1pmspect.line.eqWidthfloatnullableEW-star7? Equivalent width for star 70.1pmspect.line.eqWidthfloatnullableEW-star8? Equivalent width for star 80.1pmspect.line.eqWidthfloatnullableEW-star9? Equivalent width for star 90.1pmspect.line.eqWidthfloatnullableEW-star10? Equivalent width for star 100.1pmspect.line.eqWidthfloatnullableEW-star25? Equivalent width for star 250.1pmspect.line.eqWidthfloatnullableEW-star26? Equivalent width for star 260.1pmspect.line.eqWidthfloatnullableEW-star27? Equivalent width for star 270.1pmspect.line.eqWidthfloatnullableEW-star28? Equivalent width for star 280.1pmspect.line.eqWidthfloatnullableEW-star32? Equivalent width for star 320.1pmspect.line.eqWidthfloatnullable