MINCE IV. A detailed analysis of 37 metal-poor and subsolar metallicity stars

@misc{sgatti2026mince,
  title = {{MINCE IV. A detailed analysis of 37 metal-poor and subsolar metallicity stars}},
  author = {L. Sgatti and G. Cescutti and L. Lombardo and C. T. Nguyen and P. Bonifacio and E. Caffau and L. Monaco and R. Lallement and L. Magrini and M. Franchini and C. J. Hansen and A. Mucciarelli and A. Korn and A. Kucinskas and E. Spitoni and S. Lucatello},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.15386},
  eprint = {2609.15386},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.15386},
}

TY  - UNPB
TI  - MINCE IV. A detailed analysis of 37 metal-poor and subsolar metallicity stars
AU  - L. Sgatti
AU  - G. Cescutti
AU  - L. Lombardo
AU  - C. T. Nguyen
AU  - P. Bonifacio
AU  - E. Caffau
AU  - L. Monaco
AU  - R. Lallement
AU  - L. Magrini
AU  - M. Franchini
AU  - C. J. Hansen
AU  - A. Mucciarelli
AU  - A. Korn
AU  - A. Kucinskas
AU  - E. Spitoni
AU  - S. Lucatello
PY  - 2026
DA  - 2026/09/14
PB  - arXiv
DO  - 10.48550/arxiv.2609.15386
UR  - https://arxiv.org/abs/2609.15386
AB  - The project called Measuring at Intermediate metallicity Neutron-Capture Elements (MINCE) primarily focuses on the photospheric abundances of several neutron-capture (NC) elements from high-quality spectra of metal-poor stars within the metallicity range of -2.5 ≤ [Fe/H] ≤ −1.5, aiming to provide homogeneous information on their chemical compositions. Furthermore, based on the Gaia mission, chemical abundances can now be coupled with kinematic properties, enabling investigations of the constituent substructures of the Milky Way. We analyse the fourth sample of MINCE stars in terms of atmospheric parameters and chemical composition. The results are then compared with the previously analysed MINCE samples. The observations were conducted with HARPS-N (R ≈ 120 000) at the Telescopio Nazionale Galileo (TNG) and FIES (R ≈ 67 000 ) at the Nordic Optical Telescope (NOT), providing optical spectra with a high signal-to-noise ratio (S/N) and high resolution. We then used the methods developed in previous MINCE works and Gaia photometric data to obtain the stellar atmospheric parameters. The chemical abundances were analysed using 1D-LTE model atmospheres. We present the photospheric abundances in 37 stars of up to 26 elements, including α, iron-peak, light-odd, and 10 NC−elements (Sr, Y, Zr, Ba, La, Ce, Pr, Nd, Sm, and Eu). Kinematic properties and membership assessments are provided for all stars. The MINCE catalogue is thus expanded by 13 thin-disc stars, 9 thick-disc stars, 1 star in a transition zone between the thin and thick disc, 9 stars of the halo, and 5 Gaia-Sausage-Enceladus stars. The results agree excellently with previous MINCE works. The comparison with a Gaia Sausage Enceladus GCE model is consistent with the scenario of a major accretion event on the Milky Way from a dwarf galaxy.
ER  -