{
  "abstract": "Through a combined rest-optical and NIR observing campaign, the Large Binocular Telescope Primordial He Abundance ($Y_{\\rm p}$) Project has delivered a precision measurement of $Y_{\\rm p}$. Given the stringent requirements to measure gas-phase He abundances, the optical spectra contain emission features from a plethora of metals in the Interstellar Medium (ISM). We present gas-phase N, O, Ne, S, Cl, Ar, K and Fe abundance patterns in 62 low-metallicity nebulae. We assess ionization correction factors for each element and select those that reproduce the observed ionic abundance trends. The Ne/O, S/O, and Ar/O abundances do not evolve with metallicity and agree with the solar ratios. Given the Type Ia enrichment of S and Ar, the solar S/O and Ar/O suggest extended star formation histories in local galaxies relative to high-$z$ galaxies at fixed O/H. We report the first ISM K abundances in low-metallicity extragalactic nebulae; both Cl/O and K/O are constant with O/H, indicating the production of these odd-Z elements follows that of $α$ elements. Consistent with prior analyses, gas-phase Fe/O is observed to decrease with O/H due to dust depletion; correcting for this produces an average [Fe/O]$=$$-$0.80, implying Fe-deficient stars capable of producing hard ionizing spectra. Finally, the metallicity-insensitive log(N/O) plateau from 50 nebulae is $-$1.43$\\pm$0.10, consistent with previous works. Five galaxies have N/O significantly enhanced relative to the primary plateau, and we discuss their properties, mechanisms that could bias measurements of N/O, and nucleosynthetic progenitors that can produce enhanced N at low metallicity.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.30289",
  "author_total": 10,
  "authors": [
    {
      "name": "Noah S. J. Rogers"
    },
    {
      "name": "Evan D. Skillman"
    },
    {
      "name": "Richard W. Pogge"
    },
    {
      "name": "Erik Aver"
    },
    {
      "name": "Miqaela K. Weller"
    },
    {
      "name": "Danielle A. Berg"
    },
    {
      "name": "John J. Salzer"
    },
    {
      "name": "John H. Miller Jr"
    },
    {
      "name": "Jayde Speigel"
    },
    {
      "name": "Allison L. Strom"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/csgy3mhsyq739.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.30289",
  "fulltext_url": null,
  "id": "csgy3mhsyq739",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.30289",
  "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"
    ],
    [
      "openalex",
      "3103|Stellar, planetary, and galactic studies"
    ]
  ],
  "openalex": "W7223288131",
  "pdf_url": "https://arxiv.org/pdf/2610.30289",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/csgy3mhsyq739.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:34Z",
      "native_id": "2610.30289",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.30289"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "The LBT Y$_{\\rm p}$ Project VI: Gas-Phase Chemical Abundance Patterns of Metal-Poor Nebulae",
  "title_text": "The LBT Y_p Project VI: Gas-Phase Chemical Abundance Patterns of Metal-Poor Nebulae",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:34Z",
  "url": "https://research.draconitic.com/paper/csgy3mhsyq739",
  "venue": "arXiv",
  "versions": []
}