{
  "abstract": "There are exceedingly few chemical abundance measurements available in the literature for K dwarf stars, especially for those with T$_{eff} <$ 4700 K due to an incompatibility of traditional analyses with their molecular-line-ridden optical spectra. To address the need for K dwarf abundance constraints, we present an elemental ([C/H], [O/H]) and isotopic ($^{12}$C/$^{13}$C, $^{16}$O/$^{18}$O) abundance analysis for six K dwarf exoplanet host stars: K2-141, NGTS-10, WASP-43, WASP-69, WASP-80, and HATS-72. Each system hosts an exoplanet targeted by JWST characterization efforts, making host star abundances especially critical as baseline references. Using MARCS model atmospheres, the TurboSpectrum spectral synthesis code, and near-infrared IGRINS spectra, we derive novel [C/H] and [O/H] abundance ratios for these high-priority K dwarf host stars. We further investigate prospects for determining $^{12}$C/$^{13}$C and $^{16}$O/$^{18}$O ratios using $^{13}$C$^{16}$O and $^{12}$C$^{18}$O lines from the 2.3 micron CO bandhead. The observed spectra are too noisy to measure $^{16}$O/$^{18}$O ratios for the sample, but we do find sub-solar $^{12}$C/$^{13}$C ratios for five out of six targets. We also derive uniform gyrochronological ages for each host star to compare with galactic chemical evolution models and identify underlying abundance-age trends. NIR H+K band spectroscopy provides an alternative to optical, atomic line-derived carbon and oxygen abundances for cool dwarf stars. The growing catalog of precise host star elemental and isotopic abundances complements ongoing observations of their companions and provides a baseline for understanding their chemical composition, origin, and evolution.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.08676",
  "author_total": 10,
  "authors": [
    {
      "name": "David R. Coria"
    },
    {
      "name": "Neda Hejazi"
    },
    {
      "name": "Ian J. M. Crossfield"
    },
    {
      "name": "Ismael Mireles"
    },
    {
      "name": "Casey L. Brinkman"
    },
    {
      "name": "Jared R. Kolecki"
    },
    {
      "name": "Emilio Marfil"
    },
    {
      "name": "Thomas Nordlander"
    },
    {
      "name": "Lauren M. Weiss"
    },
    {
      "name": "Diana Dragomir"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/19ndc9zn6jms9.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.08676",
  "fulltext_url": null,
  "id": "19ndc9zn6jms9",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.08676",
  "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.EP"
    ],
    [
      "arxiv",
      "astro-ph.GA"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.08676",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/19ndc9zn6jms9.ris",
  "sources": [
    {
      "first_seen": "2026-11-10T06:21:04Z",
      "native_id": "2611.08676",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.08676"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.EP",
      "subfield": "planetary"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Expanding the Volatile Abundance Inventory for High-Priority K-Dwarf JWST Exoplanet Systems",
  "title_text": "Expanding the Volatile Abundance Inventory for High-Priority K-Dwarf JWST Exoplanet Systems",
  "type": "preprint",
  "updated_at": "2026-11-10T06:21:04Z",
  "url": "https://research.draconitic.com/paper/19ndc9zn6jms9",
  "venue": "arXiv",
  "versions": []
}