{
  "abstract": "Cosmological simulations allow a low-level tail of Population III (Pop III) star formation to persist to $z=2-6$. Spectroscopic confirmation is expensive, so an efficient photometric pre-selection is needed. We present LATED (Lyman-Alpha Tomography of Extremely Metal-poor Domains), which selects metal-free and extremely metal-poor candidates from a Ly$α$-emitter parent sample using strong-line diagnostics. The method requires three bands and two colours, $x=m_{\\rm OIII}-m_{{\\rm H}α}$ and $y=m_{{\\rm H}α}-m_{\\rm cont}$, which trace oxygen abundance and the H$α$ equivalent width, respectively. Requiring that the filters simultaneously contain [O III]+H$β$ and H$α$, together with a Ly$α$ parent selection, defines five windows spanning $z=1.92-6.60$ (four JWST/NIRCam, one Roman/WFI). The criteria, $x\\geq x_{\\rm min}(z)$ and $y\\leq y_{\\rm max}(z)$, are set by the per-redshift extrema of a forward-modelled Pop III template locus. Ordinary metal-enriched star-forming and AGN templates fall outside the selection region, and possible contaminants such as little red dots are flagged by their multi-band colours. To check contamination empirically, we apply LATED to 1126 JADES spectroscopic galaxies, and no source is selected in the four NIRCam windows. We release a Python package which converts the same photometry into R3=[O III]/H$β$ as a measurement or upper limit, reproducing JADES spectroscopy with small 0.12 dex scatter. Applied to 85 archival MUSE Ly$α$ emitters in Abell 2744, LATED recovers the confirmed extremely metal-poor galaxy AMORE6 and reveals three new candidates at $z=3-5$. Photometry alone cannot establish a metal-free nature. LATED delivers prioritised candidates for spectroscopic follow-up, providing a scalable route toward a systematic census of late-time Pop III star formation.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.24588",
  "author_total": 27,
  "authors": [
    {
      "name": "Mingyu Li"
    },
    {
      "name": "Zheng Cai"
    },
    {
      "name": "Roberto Maiolino"
    },
    {
      "name": "Fuyan Bian"
    },
    {
      "name": "Sijia Cai"
    },
    {
      "name": "Francesco D'Eugenio"
    },
    {
      "name": "Qiao Duan"
    },
    {
      "name": "Eiichi Egami"
    },
    {
      "name": "Xiaohui Fan"
    },
    {
      "name": "Yuki Isobe"
    },
    {
      "name": "Xihan Ji"
    },
    {
      "name": "Gareth C. Jones"
    },
    {
      "name": "Maria Koller"
    },
    {
      "name": "Xiaojing Lin"
    },
    {
      "name": "Boyuan Liu"
    },
    {
      "name": "Christopher C. Lovell"
    },
    {
      "name": "Kimihiko Nakajima"
    },
    {
      "name": "Masami Ouchi"
    },
    {
      "name": "Robert G. Pascalau"
    },
    {
      "name": "Zijin Su"
    },
    {
      "name": "Jan Scholtz"
    },
    {
      "name": "Fengwu Sun"
    },
    {
      "name": "Sandro Tacchella"
    },
    {
      "name": "Hannah Übler"
    },
    {
      "name": "Yunjing Wu"
    },
    {
      "name": "Fujiang Yu"
    },
    {
      "name": "Zijian Zhang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6r1tdr9e6vxpn.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.24588",
  "fulltext_url": null,
  "id": "6r1tdr9e6vxpn",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.24588",
  "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.CO"
    ],
    [
      "arxiv",
      "astro-ph.GA"
    ],
    [
      "arxiv",
      "astro-ph.IM"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ],
    [
      "openalex",
      "3103|Galaxies: Formation, Evolution, Phenomena"
    ]
  ],
  "openalex": "W7214006517",
  "pdf_url": "https://arxiv.org/pdf/2609.24588",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6r1tdr9e6vxpn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2609.24588",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.24588"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "LATED: Ly$α$-anchored photometric selection of candidate metal-free and extremely metal-poor star formation from the end of reionisation to cosmic noon",
  "title_text": "LATED: Lyα-anchored photometric selection of candidate metal-free and extremely metal-poor star formation from the end of reionisation to cosmic noon",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/6r1tdr9e6vxpn",
  "venue": "arXiv",
  "versions": []
}