{
  "abstract": "The scatter in elemental abundances among stars of similar age and metallicity reflects chemical inhomogeneity in their birth environments, making abundance scatter a key observable for chemical-tagging studies of Galactic formation and evolution. Using a large sample of subgiant stars with precise ages and elemental abundances derived from LAMOST low-resolution spectra, we investigate the intrinsic chemical abundance scatter of the low-$α$ thin disk near the solar neighborhood ($7 < R < 10$ kpc). We model the abundance ratio [X/Fe], for each of the 19 elements of concern, as a function of age, [Fe/H], and [Mg/Fe], and deduce the intrinsic dispersions with a forward modelling technique. Our results confirm previous findings that the intrinsic scatters are small, typically $\\lesssim0.05$~dex, for light elements (C, Al), $α$-elements (O, Mg, Si, Ca, Ti), and iron-peak elements (Mn, Ni). A dedicated analysis of M67 yields similarly small scatter values for these elements, implying limited discriminatory power from light-element abundances alone. In contrast, neutron-capture elements exhibit substantially larger scatters, typically $\\gtrsim$0.1 dex, which are significantly larger than those of M67 member stars ($\\sim$0.07~dex). In particular, our analysis suggests that the abundance variations of individual neutron-capture elements cannot be explained by a single tracer such as [Ba/Fe]. These findings clarify the utility of neutron-capture elements for chemical tagging and highlight the potential of low-resolution spectroscopy in such studies.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.11555",
  "author_total": 7,
  "authors": [
    {
      "name": "Wu Yaqian"
    },
    {
      "name": "Xiang Maosheng"
    },
    {
      "name": "Zhao Gang"
    },
    {
      "name": "Jiang Ruizheng"
    },
    {
      "name": "Li Zhuohan"
    },
    {
      "name": "Bi Shaolan"
    },
    {
      "name": "Zhang Meng"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/es82xh1ktv1bn.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.11555",
  "fulltext_url": null,
  "id": "es82xh1ktv1bn",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.11555",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.GA"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.11555",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-11",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/es82xh1ktv1bn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:07Z",
      "native_id": "2609.11555",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.11555"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Testing Chemical Tagging with LAMOST: Intrinsic Abundance Dispersion of Subgiant Stars in the Galactic Disk",
  "title_text": "Testing Chemical Tagging with LAMOST: Intrinsic Abundance Dispersion of Subgiant Stars in the Galactic Disk",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:07Z",
  "url": "https://research.draconitic.com/paper/es82xh1ktv1bn",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1093/mnras/stag1707",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}