{
  "abstract": "RR Lyrae are pulsating variable stars tracing old ($>10$ Gyr) stellar populations, and exhibit a strong mid-infrared Period-Luminosity (PL) relation that can be calibrated with known parallaxes to infer distances. Here we present Period-Luminosity relations and distance moduli for three isolated globular clusters in the Large Magellanic Cloud: Reticulum, NGC 1841, and NGC 1466. Our analysis uses legacy \\textit{Spitzer Space Telescope} images obtained by the Carnegie RR Lyrae Program, and an internally self-consistent sample restricted to RRab stars, with cluster membership confirmed using Gaia DR3 proper motions and photometry. In the Spitzer 3.6~$μ$m band, we simultaneously fit a PL for these clusters using a slope derived from Galactic Globular Clusters, yielding extinction-corrected distance moduli of $18.47\\pm0.09$ mag for Reticulum, $18.29\\pm0.09$ mag for NGC 1841, and $18.61\\pm0.09$ mag for NGC 1466. The latter two are the first RR Lyrae PL-based distance moduli for these clusters, and all three are consistent with literature values from other techniques. Additionally we fit a PL with slope as a free parameter, and find that this LMC-derived PL is consistent with that derived from Galactic GCs. Simultaneously fitting a PLZ for the three clusters yields a metallicity coefficient $c= -0.03\\pm0.05~\\mathrm{mag}~\\mathrm{dex}^{-1}$ which can be considered a negligible dependence of the PL on metallicity ($|c| <0.1$ mag dex$^{-1}$). Modelling an intrinsic width, $W$, to the PL/ PLZ yields a consistent value $W\\approx0.1\\pm0.02~\\mathrm{mag}$, suggesting intrinsic width is not driven by metallicity.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.21494",
  "author_total": 3,
  "authors": [
    {
      "name": "Steve Ardern"
    },
    {
      "name": "Vicky Scowcroft"
    },
    {
      "name": "Stijn Wuyts"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/f2sx9d5ef2rn9.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.21494",
  "fulltext_url": null,
  "id": "f2sx9d5ef2rn9",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.21494",
  "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.SR"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.21494",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-18",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/f2sx9d5ef2rn9.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:03Z",
      "native_id": "2609.21494",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.21494"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "The independence of the mid-infrared RR Lyrae Period-Luminosity relation from metallicity from a study of three globular clusters in the Large Magellanic Cloud",
  "title_text": "The independence of the mid-infrared RR Lyrae Period-Luminosity relation from metallicity from a study of three globular clusters in the Large Magellanic Cloud",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:03Z",
  "url": "https://research.draconitic.com/paper/f2sx9d5ef2rn9",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1093/mnras/stag1748",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}