{
  "abstract": "Silver is a poorly observed neutron-capture element, and understanding its Galactic production history requires accurate abundances for stellar samples covering a broad metallicity range. We refined the method for calculating stellar Ag abundances by considering the non-local thermodynamic equilibrium (NLTE) line formation for Ag I. A comprehensive model atom of silver was built from the atomic data available in the literature, including recent data on inelastic Ag I + H I collisions. We derived abundances using the high-resolution spectra and the synthetic spectrum method with the one-dimensional model atmospheres. From two Ag I lines in the solar spectrum we obtained the NLTE abundances log epsilon = 1.15 and 1.10 for different treatments of collisions with hydrogen atoms. The NLTE abundances of Ag were determined for the first time for 41 stars in the -2.74 <= [Fe/H] <= -0.56 metallicity range. The NLTE abundance corrections for Ag I 3382 A were found to be larger for the giants (up to 0.92~dex) than the dwarfs (up to 0.51~dex). In NLTE, Ag in our sample stars is enhanced relatively to Fe and the [Ag/Fe] Galactic trend is very similar to that for [Eu/Fe]; the [Ag/Eu], [Ag/Ba], and [Ag/Sr] abundance ratios of the r-II stars CS22892-052 and CS31082-001 agree very well with the r-process model of Prantzos et al. (2020); the -1.6 < [Fe/H] <= -0.56 stars have close-to-solar [Ag/Eu] ratios. We conclude that production of silver was dominated by the main r-process throughout the metallicity range we investigated, with the main s-process contribution of not larger than 20% for [Fe/H] > -1.6.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.38540",
  "author_total": 4,
  "authors": [
    {
      "name": "Lyudmila Mashonkina"
    },
    {
      "name": "Tatyana Sitnova"
    },
    {
      "name": "Svetlana A. Yakovleva"
    },
    {
      "name": "Vera A. Vasil'eva"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9bacg80s6qqc3.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.38540",
  "fulltext_url": null,
  "id": "9bacg80s6qqc3",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.38540",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.GA"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.38540",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9bacg80s6qqc3.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:23Z",
      "native_id": "2610.38540",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.38540"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Understanding the origin of silver in metal-poor stars based on the non-local thermodynamic equilibrium analysis of Ag I lines",
  "title_text": "Understanding the origin of silver in metal-poor stars based on the non-local thermodynamic equilibrium analysis of Ag I lines",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:45Z",
  "url": "https://research.draconitic.com/paper/9bacg80s6qqc3",
  "venue": "arXiv",
  "versions": []
}