Abundances of neutron-capture elements in stars of the galactic disk substructures

Abstract

The aim of this work is to present and discuss the observations of the iron peak (Fe, Ni) and neutron-capture element (Y, Zr, Ba, La, Ce, Nd, Sm, and Eu) abundances for 276 FGK dwarfs, located in the galactic disk with metallicity -1 < [Fe/H] < +0.3. Atmospheric parameters and chemical composition of the studied stars were determined from an high resolution, high signal-to-noise echelle spectra obtained with the echelle spectrograph ELODIE at the Observatoire de Haute-Provence (France). Effective temperatures were estimated by the line depth ratio method and from the H_α line-wing fitting. Surface gravities (log g) were determined by parallaxes and the ionization balance of iron. Abundance determinations were carried out using the LTE approach, taking the hyperfine structure for Eu into account, and the abundance of Ba was computed under the NLTE approximation. We are able to assign most of the stars in our sample to the substructures of the Galaxy thick disk, thin disk, or Hercules stream according to their kinematics. The classification of 27 stars is uncertain. For most of the stars in the sample, the abundances of neutron-capture elements have not been measured earlier. For all of them, we provide the chemical composition and discuss the contribution from different nucleosynthesis processes.

References in corpus (23)

• The Radial Velocity Experiment (RAVE): first data release
• New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey
• alpha-, r-, and s-process element trends in the Galactic thin and thick disks
• On the astrophysical robustness of neutron star merger r-process
• Magnetorotationally driven Supernovae as the origin of early galaxy $r$-process elements?
• Basic physical parameters of a selected sample of evolved stars
• Neutron-capture elements in the very metal-poor star HD122563
• Production of Light Element Primary Process nuclei in neutrino-driven winds
• The s process in massive stars at low metallicity. Effect of primary N14 from fast rotating stars
• Vertical distribution of Galactic disk stars IV - AMR and AVR from clump giants
• Chemical abundances of 451 stars from the HARPS GTO planet search program: Thin disc, thick disc, and planets
• Elemental abundances in the atmosphere of clump giants
• s-Process Nucleosynthesis in Advanced Burning Phases of Massive Stars
• Enhanced production of barium in low-mass stars: evidence from open clusters
• Evolution of the Barium abundance in the early Galaxy from a NLTE analysis of the Ba lines in a homogeneous sample of EMP stars
• A new formulation of the Type Ia SN rate and its consequences on galactic chemical evolution
• Nucleosynthesis Modes in the High-Entropy-Wind of Type II Supernovae: Comparison of Calculations with Halo-Star Observations
• Abundances of Sr, Y, and Zr in Metal-Poor Stars and Implications for Chemical Evolution in the Early Galaxy
• Revisiting two local constraints of the Galactic chemical evolution
• Metallicity as a source of dispersion in the SNIa bolometric light curve luminosity-width relationship
• The age of the Galactic thin disk from Th/Eu nucleocosmochronology I. Determination of [Th/Eu] abundance ratios
• The Galactic thick and thin disks: differences in evolution
• Spectroscopy of high proper motion stars in the ground--based UV

Cited by in corpus (75)

• Chemical evolution with rotating massive star yields: I. The solar neighbourhood and the s-process elements
• Galactic Chemical Evolution and solar s-process abundances: dependence on the 13C-pocket structure
• The Gaia-ESO Survey: the Galactic Thick to Thin Disc transition
• Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program II: Cu, Zn, Sr, Y, Zr, Ba, Ce, Nd and Eu
• 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
• The History of R-Process Enrichment in the Milky Way
• The origin and evolution of r- and s-process elements in the Milky Way stellar disk
• Stellar Diameters and Temperatures VI. High angular resolution measurements of the transiting exoplanet host stars HD 189733 and HD 209458 and implications for models of cool dwarfs
• 18 Sco: a solar twin rich in refractory and neutron-capture elements. Implications for chemical tagging
• The GALAH Survey: Non-LTE departure coefficients for large spectroscopic surveys
• A new class of Super-Earths formed from high-temperature condensates: HD219134 b, 55 Cnc e, WASP-47 e
• Stellar Abundances for Galactic Archaeology Database IV - Compilation of Stars in Dwarf Galaxies
• New insights on Ba over-abundance in open clusters. Evidence for the intermediate neutron-capture process at play?
• High-precision abundances of Sc, Mn, Cu, and Ba in solar twins. Trends of element ratios with stellar age
• Grid of theoretical NLTE equivalent widths of four Ba II lines and barium abundance in cool stars
• A Comparison of Stellar Elemental Abundance Techniques and Measurements
• Phylogeny of the Milky Way's inner disk and bulge populations: Implications for gas accretion, (the lack of) inside-out thick disk formation, and quenching
• Galactic Chemical Evolution: the Impact of the 13C-pocket Structure on the s-process Distribution
• BACCHUS Analysis of Weak Lines in APOGEE Spectra (BAWLAS)
• A critical reassessment of the fundamental properties of GJ 504: Chemical composition and age
• The Gaia-ESO Survey: Age-chemical-clock relations spatially resolved in the Galactic disc
• Evidence for $\gtrsim 4$ Gyr timescales of neutron star mergers from Galactic archaeology
• Detailed Chemical Abundances for a Benchmark Sample of M Dwarfs from the APOGEE Survey
• Hiding its age: the case for a younger bulge
• Abundances of disk and bulge giants from high-resolution optical spectra -- IV. Zr, La, Ce, Eu
• Mn abundances in the stars of the Galactic disc with metallicities -1.0 < [Fe/H] < 0.3
• Abundances of neutron-capture elements in thin- and thick-disc stars in the solar neighbourhood
• The Abundances of Light Neutron-Capture Elements in Planetary Nebulae III. The Impact of New Atomic Data on Nebular Selenium and Krypton Abundance Determinations
• TOPoS: III. An ultra iron-poor multiple CEMP system
• Origin of large meteoritic SiC stardust grains in metal-rich AGB stars
• Behaviour of elements from lithium to europium in stars with and without planets
• Exploring the s-process history in the Galactic disk: Cerium abundances and gradients in Open Clusters from the OCCAM/APOGEE sample
• Chemical analysis of CH stars - II: atmospheric parameters and elemental abundances
• Experimental neutron capture data of ${}^{58}$Ni from the CERN n_TOF facility
• Heavy elements in barium stars
• Modelling the chemical evolution of Zr, La, Ce and Eu in the Galactic discs and bulge
• The chemical DNA of the Magellanic Clouds -- I. The chemical composition of 206 Small Magellanic Cloud red giant stars
• Local associations and the barium puzzle
• Neutron-capture elements in dwarf galaxies II: Challenges for the s- and i-processes at low metallicity
• Chemical enrichment of stars due to accretion from ISM during the Galaxy's assembly
• The cerium content of the Milky Way as revealed by Gaia DR3 GSP-Spec abundances
• Systematic investigation of chemical abundances derived using IR spectra obtained with GIANO
• Enrichment of the Galactic disc with neutron capture elements: Sr
• Chemical abundances of neutron capture elements in exoplanet-hosting stars
• Chemical compositions and kinematics of the Hercules stream
• Enrichment of the Galactic disc with neutron-capture elements: Mo and Ru
• Deconvolving the HD 81809 binary: rotational and activity evidence for a subgiant with a Sun-like cycle
• Discovery of a White Dwarf Companion to HD 159062
• Spectroscopy of Dwarf Stars Around the North Celestial Pole
• From the stellar properties of HD219134 to the internal compositions of its transiting exoplanets
• Accretion and outflow activity on the late phases of pre-main-sequence evolution. The case of RZ Piscium
• A collage of small planets from the Lick Carnegie Exoplanet Survey : Exploring the super-Earth and sub-Neptune mass regime
• Calibrating the α parameter of convective efficiency using observed stellar properties
• Flares of accretion activity of the 20 Myr old UXOR RZ Psc
• On the characterization of GJ 504: a magnetically active planet-host star observed by the Transiting Exoplanet Survey Satellite (TESS)
• The chemical enrichment of the Milky Way disk evaluated using conditional abundances
• Metallicity-Suppressed Collapsars Cannot be the Dominant r-Process Source in the Milky Way
• Fine Structure of the Age-Chromospheric Activity Relation in Solar-Type Stars: II. H$\alpha$ Line
• Stellar substructures in the solar neighbourhood. III. Kinematic group 2 in the Geneva-Copenhagen survey
• Heavy elements in old very metal-rich stars
• Chemical abundances of primary stars in the Sirius-like binary systems
• More pieces of the puzzle: Chemistry and substructures in the Galactic thick disk
• Stellar substructures in the solar neighbourhood. II. Abundances of neutron-capture elements in the kinematic Group 3 of the Geneva-Copenhagen survey
• Enrichment of the Galactic disc with neutron-capture elements: Gd, Dy, and Th
• Stellar substructures in the solar neighbourhood IV. Kinematic Group 1 in the Geneva-Copenhagen survey
• Chemical compositions of giants in the Hyades And Sirius superclusters
• 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
• Peculiarities of α-element abundances in Galactic open clusters
• Peculiarities of the abundances of neutron-capture elements in Galactic open clusters
• An Updated Line List for Spectroscopic Investigation of G Stars II: Refined Solar Abundances via Extended Wavelength Coverage to 10 000 Å
• The first r-process enhanced star confirmed to be a member of the Galactic bulge
• Metallicity and absolute magnitude calibrations for F-G type main-sequence stars in the Gaia era
• The impact of rare events on the chemical enrichment in dwarf galaxies
• Th/Eu abundance ratio of red giants in the Kepler Field