MINCE III. Detailed chemical analysis of the UVES sample
arXiv:2501.14470 · doi:10.1051/0004-6361/202452964
Abstract
Context. The MINCE (Measuring at Intermediate Metallicity Neutron-Capture Elements) project aims to provide high quality neutron-capture abundances measurements in several hundred stars at intermediate metallicity,-2.5 < [Fe/H] < -1.5. This project will shed light on the origin of the neutron-capture elements and the chemical enrichment of the Milky Way. Aims. The goal of this work is to chemically characterize the second sample of the MINCE project and compare the abundances with the galactic chemical evolution model at our disposal. Methods. We performed a standard abundance analysis based on 1D LTE model atmospheres on high-resolution and high-signal-to-noise-ratio UVES spectra. Results. We provide the kinematic classification (i.e., thin disk, thick disk, thin-to-thick disk, halo, Gaia Sausage Enceladus, Sequoia) of 99 stars and the atmospheric parameters for almost all stars. We derive the abundances for light elements (from Na to Zn) and neutron-capture elements (Rb, Sr, Y, Zr, Ba, La, Ce, Pr, Nd, Sm, Eu) in a subsample of 32 stars in the metallicity range -2.5 < Fe/H] < -1.00. In the subsample of 32 stars, we identify 8 active stars exhibiting (inverse) P-Cygni profile and one Li-rich star, CD 28-11039. We find a general agreement between the chemical abundances and the stochastic model computed for the chemical evolution of the Milky Way halo for the elements Mg, Ca, Si, Ti, Sc, Mn, Co, Ni, Zn, Rb, Sr, Y, Zr, Ba, La, and Eu . Conclusions. The MINCE project has already significantly increased the number of neutron-capture elements measurements in the intermediate metallicity range. The results from this sample are in perfect agreement with the previous MINCE sample. The good agreement between the chemical abundances and the chemical evolution model of the Galaxy supports the nucleosynthetic processes adopted to describe the origin of the n-capture elements.
33 pages, 15 figures, 11 tables
References in corpus (49)
- Gaia Data Release 3: Summary of the content and survey properties
- Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
- galpy: A Python Library for Galactic Dynamics
- Gaia Early Data Release 3: Parallax bias versus magnitude, colour, and position
- The Dawes Review 2: Nucleosynthesis and stellar yields of low and intermediate-mass single stars
- VOSA: Virtual Observatory SED Analyzer. An application to the Collinder 69 open cluster
- Evidence for Two Early Accretion Events That Built the Milky Way Stellar Halo
- Identification of strontium in the merger of two neutron stars
- The Milky Way's circular velocity curve between 4 and 14 kpc from APOGEE data
- An extremely primitive halo star
- First Stars VIII -- Enrichment of the neutron-capture elements in the early Galaxy
- Updated parameters of 1743 open clusters based on Gaia DR2
- Age determination for 269 DR2 Open Clusters
- NLTE abundances of Mn in a sample of metal-poor stars
- The intermediate neutron-capture process and carbon-enhanced metal-poor stars
- The updated BaSTI stellar evolution models and isochrones: II. alpha-enhanced calculations
- Sulphur and zinc abundances in Galactic halo stars revisited
- Silver and palladium help unveil the nature of a second r-process
- Iron and neutron-capture element abundance variations in the globular cluster M2 (NGC 7089)
- Three-dimensional extinction maps: Inverting inter-calibrated extinction catalogues
- The role of neutron star mergers in the chemical evolution of the Galactic halo
- i-process nucleosynthesis and mass retention efficiency in He-shell flash evolution of rapidly accreting white dwarfs
- Exploiting the Gaia EDR3 photometry to derive stellar temperatures
- Selecting accreted populations: metallicity, elemental abundances, and ages of the Gaia-Sausage-Enceladus and Sequoia populations
- A Sequoia in the Garden: FSR 1758 - Dwarf Galaxy or Giant Globular Cluster?
- An inhomogeneous model for the Galactic halo: a possible explanation for the spread observed in s- and r-process elements
- Explaining the Ba, Y, Sr, and Eu abundance scatter in metal-poor halo stars: constraints to the r-process
- How many nucleosynthesis processes exist at low metallicity?
- The formation of the Milky Way halo and its dwarf satellites; a NLTE-1D abundance analysis. II. Early chemical enrichment
- Nine New Metal-Poor Stars on the Subgiant and Red Horizontal Branches with High Levels of r-process Enhancement
- Learning about the intermediate neutron-capture process from lead abundances
- The Gaia-ESO survey: Mixing processes in low-mass stars traced by lithium abundance in cluster and field stars
- Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era
- Observational constraints on the origin of the elements. III. Evidence for the dominant role of sub-Chandrasekhar SN Ia in the chemical evolution of Mn and Fe in the Galaxy
- Mass Outflow and Chromospheric Activity of Red Giant Stars in Globular Clusters I: M15
- Constraints on stellar rotation from the evolution of Sr and Ba in the Galactic halo
- Discovery of a thin lithium plateau among metal-poor red giant branch stars
- Stellar variability in Gaia DR3. I. Three-band photometric dispersions for 145 million sources
- Chemical Evolution of R-process Elements in Stars (CERES). I. Stellar parameters and chemical abundances from Na to Zr
- Mono-enriched stars and Galactic chemical evolution -- Possible biases in observations and theory
- Ancient Very Metal-Poor Stars Associated With the Galactic Disk in the H3 Survey
- Manganese spread in Ursa Minor as a proof of sub-classes of type Ia supernovae
- MINCE I. Presentation of the project and of the first year sample
- GSP-spec line list for the parametrisation of Gaia -RVS stellar spectra
- Young giants of intermediate mass Evidence of rotation and mixing
- Neutron stars mergers in a stochastic chemical evolution model: impact of time delay distributions
- The metal-poor end of the Spite plateau. II. Detailed chemical investigation
- The true nature of HE0057-5959, the most metal-poor Li-rich star
- The Gaia RVS benchmark stars II. A sample of stars selected for their Gaia high radial velocity