J/A+A/664/A161ivo://CDS.VizieR/J/A+A/664/A161doi:10.26093/cds/vizier/bc-mr/lbgbCDSBiazzo K.D'Orazi V.Desidera S.Turrini D.Benatti S.Gratton R.,Magrini L.Sozzetti A.Baratella M.Bonomo A.S.Borsa F.Claudi R.,Covino E.Damasso M.Di Mauro M.P.Lanza A.F.Maggio A.Malavolta L.,Maldonado J.Marzari F.Micela G.Poretti E.Vitello F.Affer L.,Bignamini A.Carleo I.Cosentino R.Fiorenzano A.F.M.Giacobbe P.,Harutyunyan A.Leto G.Mancini L.Molinari E.Molinaro M.,Nardiello D.Nascimbeni V.Pagano I.Pedani M.Piotto G.Rainer M.,Scandariato G.2026-07-01T14:00:24Z2026-01-30T12:57:37ZCDS support team

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

cds-question@unistra.frchemical-abundancesspectroscopyvisible-astronomyExoplanetary properties strongly depend on stellar properties: to know the planet with accuracy and precision it is necessary to know the star as accurately and precisely as possible. Our immediate aim is to characterize in a homogeneous and accurate way a sample of 27 transiting planet-hosting stars observed within the Global Architecture of Planetary System program. For the wide visual binary XO-2, we considered both components (N: hosting a transiting planet; S: without a known transiting planet). Our final goal is to widely analyze the sample by deriving several stellar properties, abundances of many elements, kinematic parameters, and discuss them in the context of planetary formation. We determined the stellar parameters (effective temperature, surface gravity, rotational velocity) and abundances of 26 elements (Li, C, N, O, Na, Mg, Al, Si, S, Ca, Sc, Ti, V, Cr, Fe, Mn, Co, Ni, Cu, Zn, Y, Zr, Ba, La, Nd, Eu). Our study is based on high-resolution HARPS-N at TNG and FEROS at ESO spectra and uniform techniques. Depending on stellar parameters and chemical elements, we used line equivalent widths or spectral synthesis methods. We derived kinematic properties taking advantage of Gaia data and for the first time in exoplanet host stars we estimated ages using elemental ratios as chemical clocks. The effective temperature of our stars is around 4400-6700K, while the iron abundance [Fe/H] is within -0.3 and 0.4dex. Lithium is present in seven stars. The [X/H] and [X/Fe] abundances versus [Fe/H] are consistent with the Galactic chemical evolution. The dependence of [X/Fe] with the condensation temperature is critically analyzed with respect to stellar and kinematic properties. All targets with measured C and O abundances show C/O<0.8, compatible with Si present in rock-forming minerals. Mean C/O and [C/O] values are slightly lower than for the Sun. Most of targets show 1.0<Mg/Si<1.5, compatible with Mg distributed between olivine and pyroxene, and mean Mg/Si lower than for the Sun. HAT-P-26, the target hosting the lowest-mass planet, shows the highest Mg/Si ratio. From our chemodynamical analysis we find agreement between ages and position within the Galactic disk. Finally, we note a tendency for higher-density planets to be around metal-rich stars and hints of higher stellar abundances of some volatiles (e.g., O) for lower-mass planets. We cannot exclude that part of our results could be also related to the location of the stars within the Galactic disk. We try to trace the planetary migration scenario from the composition of the planets related to the chemical composition of the hosting stars. This kind of study will be useful for upcoming space mission data to get more insights into the formation-migration mechanisms.2022A&A...664A.161Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/664/A161CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/664/A161https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/664/A161http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/664/A161https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/664/A161https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/664/A161http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/664/A161GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/664/A161/targets (Final stellar parameters (table 1) and stellar kinematic properties as derived in the present work (table A2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/664/A161/targets?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/664/A161/targets?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/664/A161/targets?GETtext/xml+votable180.050000true206.094140648.02866830.0055555555555555566/876 1275 2551 4990 5475 6017 6181 6638 9173 9482 9524 10407 10654 10730 10953 13143 13569 15950 20382 22001 25721 25885 26019 26062 26771 31641 32749https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/664/A161?format=asciiOpticaldefaultJ/A+A/664/A161/targetsFinal stellar parameters (table 1) and stellar kinematic properties as derived in the present work (table A2)SimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTeffEffective temperatureKphys.temperature.effectiveinte_TeffError in effective temperatureKstat.error;phys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloate_loggError in surface gravitylog(cm.s**-2)stat.errorfloatxiMicroturbulence velocitykm/sphys.veloc.microTurbfloate_xiError in microturbulence velocitykm/sstat.errorfloat[FeI/H]FeI abundancephys.abundfloate_[FeI/H]Error in FeI abundancestat.error;phys.abundfloat[FeII/H]FeII abundancephys.abundfloate_[FeII/H]Error in FeII abundancestat.error;phys.abundfloatVmacroMacroturbulence velocitykm/sphys.velocfloatvsiniProjected rotational velocitykm/sphys.veloc.rotatfloate_vsiniError in projected rotational velocitykm/sstat.error;phys.veloc.rotatfloatlognLi? Lithium abundancephys.abundfloatnullablee_lognLi? Error in lithium abundancestat.errorfloatnullableRVMean radial velocitykm/sphys.veloc;pos.heliocentricdoublee_RVError in mean radial velocitykm/sstat.errorfloat[C/H]? CI abundancephys.abundfloatnullablee_[C/H]? Error in CI abundancephys.abundfloatnullable[N/H]? NI abundancephys.abundfloatnullablee_[N/H]? Error in NI abundancephys.abundfloatnullable[O/H]? OI abundancephys.abundfloatnullablee_[O/H]? Error in OI abundancephys.abundfloatnullable[Na/H]? NaI abundancephys.abundfloatnullablee_[Na/H]? Error in NaI abundancephys.abundfloatnullable[Mg/H]? MgI abundancephys.abundfloatnullablee_[Mg/H]Error in MgI abundancephys.abundfloat[Al/H]AlI abundancephys.abundfloate_[Al/H]Error in AlI abundancephys.abundfloat[Si/H]SiI abundancephys.abundfloate_[Si/H]Error in SiI abundancephys.abundfloat[S/H]? SI abundancephys.abundfloatnullablee_[S/H]? Error in SI abundancephys.abundfloatnullable[Ca/H]? CaI abundancephys.abundfloatnullablee_[Ca/H]Error in CaI abundancephys.abundfloat[Sc/H]ScII abundancephys.abundfloate_[Sc/H]Error in ScII abundancephys.abundfloat[TiI/H]TiI abundancephys.abundfloate_[TiI/H]Error in TiI abundancestat.error;phys.abundfloat[TiII/H]TiII abundancephys.abundfloate_[TiII/H]Error in TiII abundancestat.error;phys.abundfloat[V/H]VI abundancephys.abundfloate_[V/H]Error in VI abundancephys.abundfloat[CrI/H]CrI abundancephys.abundfloate_[CrI/H]Error in CrI abundancestat.error;phys.abundfloat[CrII/H]CrII abundancephys.abundfloate_[CrII/H]Error in CrII abundancestat.error;phys.abundfloat[Mn/H]? MnI abundancephys.abundfloatnullablee_[Mn/H]? Error in MnI abundancephys.abundfloatnullable[Co/H]? CoI abundancephys.abundfloatnullablee_[Co/H]Error in CoI abundancephys.abundfloat[Ni/H]NiI abundancephys.abundfloate_[Ni/H]Error in NiI abundancephys.abundfloat[Cu/H]CuI abundancephys.abundfloate_[Cu/H]Error in CuI abundancephys.abundfloat[Zn/H]? ZnI abundancephys.abundfloatnullablee_[Zn/H]? Error in ZnI abundancephys.abundfloatnullable[Y/H]YII abundancephys.abundfloate_[Y/H]Error in YII abundancephys.abundfloat[Zr/H]? ZrII abundancephys.abundfloatnullablee_[Zr/H]? Error in ZrII abundancephys.abundfloatnullable[Ba/H]BaII abundancephys.abundfloate_[Ba/H]Error in BaII abundancephys.abundfloat[La/H]? LaII abundancephys.abundfloatnullablee_[La/H]? Error in LaII abundancephys.abundfloatnullable[Nd/H]NaII abundancephys.abundfloate_[Nd/H]Error in NdII abundancephys.abundfloat[Eu/H]? EuII abundancephys.abundfloatnullablee_[Eu/H]? Error in EuII abundancephys.abundfloatnullable_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.mainNameObject Namemeta.id;meta.maincharl_lognLiLimit flag on lognLimeta.code.errorchar