Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program II: Cu, Zn, Sr, Y, Zr, Ba, Ce, Nd and Eu

Abstract

To understand the formation and evolution of the different stellar populations within our Galaxy it is essential to combine detailed kinematical and chemical information for large samples of stars. We derive chemical abundances of Cu, Zn, Sr, Y, Zr, Ba, Ce, Nd and Eu for a large sample of more than 1000 FGK dwarf stars with high-resolution ($R\sim$\,115000) and high-quality spectra from the HARPS-GTO program. The abundances are derived by a standard Local Thermodinamyc Equilibrium (LTE) analysis using measured Equivalent Widths (EWs) injected to the code MOOG and a grid of Kurucz ATLAS9 atmospheres. We find that thick disk stars are chemically disjunct for Zn and Eu and also show on average higher Zr but lower Ba and Y when compared to the thin disk stars. We also discovered that the previously identified high-$\alpha$ metal-rich population is also enhanced in Cu, Zn, Nd and Eu with respect to the thin disk but presents Ba and Y abundances lower on average, following the trend of thick disk stars towards higher metallities and further supporting the different chemical composition of this population. The ratio of heavy-s to light-s elements of thin disk stars presents the expected behaviour (increasing towards lower metallicities) and can be explained by a major contribution of low-mass AGB stars for s-process production at disk metallicities. However, the opposite trend found for thick disk stars suggests that intermediate-mass AGB stars played an important role in the enrichment of the gas from where these stars formed. Previous works in the literature also point to a possible primary production of light-s elements at low metallicities to explain this trend. Finally, we also find an enhancement of light-s elements in the thin disk at super solar metallicities which could be caused by the contribution of metal-rich AGB stars. (short version)

20 pages, 19 figures, accepted by A&A

References in corpus (22)

• Spectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes
• Basic physical parameters of a selected sample of evolved stars
• A new code for automatic determination of equivalent widths: Automatic Routine for line Equivalent widths in stellar Spectra (ARES)
• Galactic Chemical Evolution and solar s-process abundances: dependence on the 13C-pocket structure
• ARES v2 - new features and improved performance
• Systematic non-LTE study of the $-2.6\le$ [Fe/H] $\le 0.2$ F and G dwarfs in the solar neighbourhood. II. Abundance patterns from Li to Eu
• Evolution and nucleosynthesis of asymptotic giant branch stellar models of low metallicity
• Estimating distances from parallaxes. II. Performance of Bayesian distance estimators on a Gaia-like catalogue
• Li abundances in F stars: planets, rotation and galactic evolution
• Atomic and Molecular Data for Optical Stellar Spectroscopy
• The 12C + 12C reaction and the impact on nucleosynthesis in massive stars
• Enhanced production of barium in low-mass stars: evidence from open clusters
• Correcting the spectroscopic surface gravity using transits and asteroseismology. No significant effect on temperatures or metallicities with ARES+MOOG in LTE
• Oxygen abundances in G- and F-type stars from HARPS
• On the need of the Light Elements Primary Process (LEPP)
• The Evolution of Oxygen and Magnesium in the Bulge and Disk of the Milky Way
• Galactic Chemical Evolution: the Impact of the 13C-pocket Structure on the s-process Distribution
• Contrasting copper evolution in Omega Centauri and the Milky Way
• s-Processing in AGB Stars Revisited. I. Does the Main Component Constrain the Neutron Source in the 13C-Pocket?
• CNO behaviour in planet-harbouring stars. II. Carbon abundances in stars with and without planets using the CH band
• Non-LTE analysis of neutral copper in the late-type metal-poor stars
• HD 11397 and HD 14282 - Two new barium stars?

Cited by in corpus (106)

• Age dissection of the Milky Way discs: red giants in the Kepler field
• Abundance to age ratios in the HARPS-GTO sample with Gaia DR2: Chemical clocks for a range of [Fe/H]
• Stellar chromospheric activity of 1,674 FGK stars from the AMBRE-HARPS sample I. A catalogue of homogeneous chromospheric activity
• ARIADNE: Measuring accurate and precise stellar parameters through SED fitting
• The temporal evolution of neutron-capture elements in the Galactic discs
• StarHorse results for spectroscopic surveys + Gaia DR3: Chrono-chemical populations in the solar vicinity, the genuine thick disk, and young-alpha rich stars
• SWEET-Cat 2.0: The Cat just got SWEETer; Higher quality spectra and precise parallaxes from GAIA eDR3
• The GALAH Survey: Non-LTE departure coefficients for large spectroscopic surveys
• Hidden magnetic fields of young suns
• Elevated r-process enrichment in Gaia Sausage and Sequoia
• Spectroscopic age estimates for APOGEE red-giant stars: Precise spatial and kinematic trends with age in the Galactic disc
• Gaia Data Release 3: Chemical cartography of the Milky Way
• Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program IV. Carbon and C/O ratios for Galactic stellar populations and planet hosts
• Unveiling the time evolution of chemical abundances across the Milky Way disk with APOGEE
• The Similarity of Abundance Ratio Trends and Nucleosynthetic Patterns in the Milky Way Disk and Bulge
• BACCHUS Analysis of Weak Lines in APOGEE Spectra (BAWLAS)
• On the origin of the Galactic thin and thick discs, their abundance gradients and the diagnostic potential of their abundance ratios
• OCCASO III. Iron peak and $\alpha$ elements of 18 open clusters. Comparison with chemical evolution models and field stars
• The Gaia-ESO Survey: Age-chemical-clock relations spatially resolved in the Galactic disc
• Abundance ratios in GALAH DR2 and their implications for nucleosynthesis
• K2-111: an old system with two planets in near-resonance
• TOI-431/HIP 26013: a super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet
• Abundances of disk and bulge giants from high-resolution optical spectra -- IV. Zr, La, Ce, Eu
• Abundances of neutron-capture elements in thin- and thick-disc stars in the solar neighbourhood
• Chemical abundances of 1111 FGK stars from the HARPS-GTO planet search sample. III. Sulfur
• Precise masses for the transiting planetary system HD 106315 with HARPS
• Precision angular diameters for 16 southern stars with VLTI/PIONIER
• Explaining the decrease in ISM lithium at super-solar metallicities in the solar vicinity
• TOI-5005 b: A super-Neptune in the savanna near the ridge
• Evaluating the Plausible Range of N2O Biosignatures on Exo-Earths: An Integrated Biogeochemical, Photochemical, and Spectral Modeling Approach
• Heavy elements in barium stars
• Deciphering the evolution of the Milky Way discs: Gaia APOGEE Kepler giant stars and the Besançon Galaxy Model
• OCCASO V. Chemical-abundance trends with Galactocentric distance and age
• Tess asteroseismology of the known planet host star ${\lambda }^2$ Fornacis
• Modelling the chemical evolution of Zr, La, Ce and Eu in the Galactic discs and bulge
• Radiogenic Heating and its Influence on Rocky Planet Dynamos and Habitability
• TESS spots a mini-neptune interior to a hot saturn in the TOI-2000 system
• On the mass and metallicity distribution of parent AGB stars of presolar SiC
• The HD 137496 system: A dense, hot super-Mercury and a cold Jupiter
• The McDonald Accelerating Stars Survey (MASS): White Dwarf Companions Accelerating the Sun-like Stars 12 Psc and HD 159062
• Long-term stellar activity variations and their effect on radial-velocity measurements
• The CARMENES search for exoplanets around M dwarfs: Rubidium abundances in nearby cool stars
• Occurrence rates of small planets from HARPS: Focus on the Galactic context
• The GALAH Survey: Temporal Chemical Enrichment of the Galactic Disk
• Galactic chemical evolution of exoplanet host stars: Are high-mass planetary systems young?
• A comprehensive study of NGC 2345, a young open cluster with a low metallicity
• Three open clusters containing Cepheids: NGC 6649, NGC 6664 and Berkeley 55
• Elemental Abundances of the Super-Neptune WASP-107b's Host Star Using High-resolution, Near-infrared Spectroscopy
• The cerium content of the Milky Way as revealed by Gaia DR3 GSP-Spec abundances
• The homogeneous characterisation of Ariel host stars
• Enrichment of the Galactic disc with neutron capture elements: Sr
• Super-Earths and sub-Neptunes are Insensitive to Stellar Metallicity
• On the iron ionization balance of cool stars
• Comprehensive abundance analysis of red giants in the open clusters Stock 2, NGC 2168, 6475, 6991 and 7762
• The young mini-Neptune HD 207496b that is either a naked core or on the verge of becoming one
• The role of radial migration in open cluster and field star populations with Gaia dr3
• Testing abundance-age relations beyond solar analogues with Kepler LEGACY stars
• HD207897 b: A dense sub-Neptune transiting a nearby and bright K-type star
• A hot mini-Neptune in the radius valley orbiting solar analogue HD 110113
• Enrichment of the Galactic disc with neutron-capture elements: Mo and Ru
• Identification of Absorption Lines of Heavy Metals in the Wavelength Range 0.97--1.32 Micron
• TOI-220 $b$: a warm sub-Neptune discovered by TESS
• Chemistry of multiple stellar populations in the mono-metallic, in situ, bulge globular cluster NGC 6388
• Classification of High-resolution Solar Hα Spectra using t-distributed Stochastic Neighbor Embedding
• The Gaia-ESO survey: placing constraints on the origin of r-process elements
• Stellar dating using chemical clocks and Bayesian inference
• Observational constraints on the origin of the elements. VI. Origin and evolution of neutron-capture elements as probed by the Gaia-ESO survey
• Orbital and atmospheric parameters of two wide O-type subdwarf binaries: BD$-$11${}^{\mathrm{o}}$162 and Feige 80
• Effective Temperature Estimations from Line Depth Ratios in the \H\ and \K-band Spectra of IGRINS
• Revisiting inelastic Cu+H collisions and the non-LTE Galactic evolution of copper
• Europium as a lodestar: diagnosis of radiogenic heat production in terrestrial exoplanets
• Ariel stellar characterisation II. Chemical abundances of carbon, nitrogen, and oxygen for 181 planet-host FGK dwarf stars
• The Chemical Evolution of Iron-Peak Elements with Hypernovae
• Derivation of parameters for 3748 FGK stars using H-band spectra from APOGEE Data Release 14
• The in situ origin of the globular cluster NGC 6388 from abundances of Sc, V, and Zn of a large sample of stars
• ATREIDES I. Embarking on a trek across the exo-Neptunian landscape with the TOI-421 system
• TESS and HARPS reveal two sub-Neptunes around TOI 1062
• Exploring the dependence of chemical traits on metallicity: chemical trends for red giant stars with asteroseismic ages
• TOI-908: a planet at the edge of the Neptune desert transiting a G-type star
• The HARPS search for southern extra-solar planets. XLVII. Five Jupiter-mass planets in long-period orbits, one highly irradiated Neptune, one brown dwarf, and five stellar binaries
• Determination of stellar parameters for Ariel targets: a comparison analysis between different spectroscopic methods
• VPNEP: Detailed characterization of TESS targets around the Northern Ecliptic Pole
• The Gaia-ESO Survey DR5.1 and Gaia DR3 GSP-Spec: a comparative analysis
• Analysis of the public HARPS/ESO spectroscopic archive -- Jupiter-like planets around HD 103891 and HD 105779
• Predicting convective blueshift and radial-velocity dispersion due to granulation for FGK stars
• Discovery and characterisation of two Neptune-mass planets orbiting HD 212729 with TESS
• The New Generation Planetary Population Synthesis (NGPPS). VII. Statistical comparison with the HARPS/Coralie survey
• Gemini-GRACES high-quality spectra of Kepler evolved stars with transiting planets I. Detailed characterization of multi-planet systems Kepler-278 and Kepler-391
• Abundances of disk and bulge giants from high-resolution optical spectra V. Molybdenum -- the p-process element
• Correlating Intrinsic Stellar Parameters with Mg II Self-Reversal Depths
• TOI-2498 b: A hot bloated super-Neptune within the Neptune desert
• Rubidium abundances in solar metallicity stars
• Planets Around Solar Twins/Analogs (PASTA) II: chemical abundances, systematic offsets, and clues to planet formation
• A low-mass sub-Neptune planet transiting the bright active star HD 73344
• S-Process Nucleosynthesis in Chemically Peculiar Binaries
• The Disk Veiling Effect of the Black Hole Low-Mass X-ray Binary A0620-00
• Where in the Milky Way Do Exoplanets Preferentially Form?
• M giants with IGRINS IV. Identification and characterization of a near-IR line of the s-element Barium
• Solar twins in Gaia DR3 GSP-Spec I. Building a large catalog of Solar twins with ages
• Searching for the nature of stars with debris disks and planets
• Benchmark stars, benchmark spectrographs: Detailed spectroscopic comparison of ESPRESSO, PEPSI, and HARPS data for Gaia benchmark stars
• Metallicity and absolute magnitude calibrations for F-G type main-sequence stars in the Gaia era
• Distribution of Europium in The Milky Way Disk; Its Connection to Planetary Habitability and The Source of The R-Process
• A chemical perspective on planet formation in reduced systems
• Oxygen and Aluminum-Magnesium Isotopic Systematics of Presolar Nanospinel Grains from CI Chondrite Orgueil
• Rapid early gas accretion for the inner Galactic disc