Year: 2025
Type: article
Abstract: Context. The Measuring at Intermediate Metallicity Neutron-Capture Elements (MINCE) project aims to provide high-quality neutron-capture abundances measurements for several hundred stars at an intermediate metallicity of −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 one-dimensional (1D) local thermodynamic equilibrium (LTE) model atmospheres based on high-resolution and high-signal-to-noise-ratio (S/N) spectra from Ultraviolet and Visual Echelle Spectrograph (UVES). 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 derived the abundances for light elements (from Na to Zn) and neutron-capture elements (Rb, Sr, Y, Zr, Ba, La, Ce, Pr, Nd, Sm, and Eu) for a subsample of 32 stars in the metallicity range of −2.5 < [Fe/H] < −1.00. In the subsample of 32 stars, we identified eight 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 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.
Authors: F. Lucertini, L. Sbordone, E. Caffau, P. Bonifacio, L. Monaco, G. Cescutti, R. Lallement, P. François, E. Spitoni, C. J. Hansen, A. J. Korn, A. Kučinskas, A. Mucciarelli, L. Magrini, L. Lombardo, M. Franchini, R. F. de Melo
Institutions: European Southern Observatory, Universidad Andrés Bello, Trieste Astronomical Observatory, Centre National de la Recherche Scientifique, Université Paris Sciences et Lettres, Observatoire de Paris, Galaxies, Etoiles, Physique et Instrumentation, Université de Picardie Jules Verne, Goethe University Frankfurt, Uppsala University, Vilnius University, Arcetri Astrophysical Observatory, National Institute for Astrophysics
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1175115578, G1495698476, G1628279444, G210041235, G2262748287, G2452073530, G2601397997, G2848058298, G2945112853, G300979063, G34346518, G3480869486, G3681454997, G4042783231, Exoplanet Athmosphere New Emission Transmission Spectra Analysis, G425668148, G4442677895, G4526231891, G4656594441, G4799660045, G5080475149, G5195188938, G6552740809, Chemical Elements as Tracers of the Evolution of the Cosmos - Infrastructures for Nuclear Astrophysics, G7084143925, Pristine — A survey of the first Galactic stars
OpenAlex ID: W6959759560
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