{
  "abstract": "Little red dots (LRDs) are a newly discovered population that may trace rapidly growing black holes (BHs) and provide a link between seed BHs and luminous active galactic nuclei (AGNs). However, no LRD had previously been spectroscopically confirmed at $z>10$, leaving this earliest phase observationally unexplored. Using JWST/NIRSpec spectroscopy from the EMBER program, we measure a spectroscopic redshift of $z_{\\rm spec}=10.361^{+0.003}_{-0.002}$ for \\target, the highest-redshift LRD candidate known to date. The redshift is constrained by a prominent Ly$α$ break and multiple tentative emission lines, including C\\,{\\sc iv}\\,$λ\\lambda1549,1551$ and [O\\,{\\sc iii}]\\,$\\lambda4363$ detected at $S/N=3.9$ and $3.6$, respectively. Its extreme NIRCam-MIRI color of $m_{\\rm F444W}-m_{\\rm F770W}=1.82\\pm0.1$, characteristic V-shaped continuum with a turnover near the Balmer limit, and continuum slopes of $β_{\\rm UV}=-2.26^{+0.11}_{-0.11}$ and $β_{\\rm opt}=1.17^{+0.74}_{-0.70}$ all support its LRD nature. A possible iron complex at $λ_{\\rm rest}\\sim0.24$--$0.25\\,{\\rm μm}$ and a possibly high $\\log\\left([{\\rm O\\,III]\\,\\lambda4363/\\rm Hγ}\\right)=0.17^{+0.24}_{-0.22}$ further support an AGN-like interpretation, as seen in previously known LRDs. Tentative detection of Ly$α$ emission may indicate enhanced Ly$α$ transmission at $z\\sim10$. Our findings extend the observational frontier of BH growth into the seed-BH formation era, and upcoming MIRI spectroscopy will further establish the physical nature of the source.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.00195",
  "author_total": 61,
  "authors": [
    {
      "name": "Takumi S. Tanaka"
    },
    {
      "name": "Hollis B. Akins"
    },
    {
      "name": "John D. Silverman"
    },
    {
      "name": "Caitlin M. Casey"
    },
    {
      "name": "Ezequiel Treister"
    },
    {
      "name": "Manuel Aravena"
    },
    {
      "name": "Yuichi Harikane"
    },
    {
      "name": "Benny Trakhtenbrot"
    },
    {
      "name": "Kohei Inayoshi"
    },
    {
      "name": "Kazuhiro Shimasaku"
    },
    {
      "name": "Maximilien Franco"
    },
    {
      "name": "Seiji Fujimoto"
    },
    {
      "name": "Mingyu Li"
    },
    {
      "name": "Hiroya Umeda"
    },
    {
      "name": "Jan-Torge Schindler"
    },
    {
      "name": "Akio K. Inoue"
    },
    {
      "name": "Jean-Baptiste Billand"
    },
    {
      "name": "Darshan Kakkad"
    },
    {
      "name": "Xuheng Ding"
    },
    {
      "name": "Steven L. Finkelstein"
    },
    {
      "name": "Michaela Hirschmann"
    },
    {
      "name": "Z. Ghaffari"
    },
    {
      "name": "Andrew J. Battisti"
    },
    {
      "name": "Lauro Moscardini"
    },
    {
      "name": "Nicole E. Drakos"
    },
    {
      "name": "Rasha M. Samir"
    },
    {
      "name": "Jeyhan S. Kartaltepe"
    },
    {
      "name": "Qinyue Fei"
    },
    {
      "name": "Ming-Yang Zhuang"
    },
    {
      "name": "Olivier Ilbert"
    },
    {
      "name": "Wuji Wang"
    },
    {
      "name": "Rafael C. Arango-Toro"
    },
    {
      "name": "Hiddo S. B. Algera"
    },
    {
      "name": "Greta Toni"
    },
    {
      "name": "Junya Arita"
    },
    {
      "name": "Kei Ito"
    },
    {
      "name": "Ghassem Gozaliasl"
    },
    {
      "name": "Dale D. Kocevski"
    },
    {
      "name": "Yunjing Wu"
    },
    {
      "name": "Masafusa Onoue"
    },
    {
      "name": "Marc Huertas-Company"
    },
    {
      "name": "Yiyang Zhang"
    },
    {
      "name": "Jason Rhodes"
    },
    {
      "name": "Andreas L. Faisst"
    },
    {
      "name": "Zihao Li"
    },
    {
      "name": "Crystal L. Martin"
    },
    {
      "name": "Makoto Ando"
    },
    {
      "name": "Vasily Kokorev"
    },
    {
      "name": "Sophie L. Newman"
    },
    {
      "name": "Can Xu"
    },
    {
      "name": "Suin Matsui"
    },
    {
      "name": "Jialai Wang"
    },
    {
      "name": "Carter Flayhart"
    },
    {
      "name": "Hossein Hatamnia"
    },
    {
      "name": "Ali Ahmad Khostovan"
    },
    {
      "name": "Ronaldo Laishram"
    },
    {
      "name": "Felix Martinez III"
    },
    {
      "name": "David B. Sanders"
    },
    {
      "name": "Sune Toft"
    },
    {
      "name": "Francesco Valentino"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0xaqvy4qhkbf9.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.00195",
  "fulltext_url": null,
  "id": "0xaqvy4qhkbf9",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.00195",
  "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": null,
  "pdf_url": "https://arxiv.org/pdf/2611.00195",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0xaqvy4qhkbf9.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:59Z",
      "native_id": "2611.00195",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.00195"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "EMBER: A Little Red Dot Candidate at $z_{\\rm spec}=10.36$ in the Seed Black Hole Era",
  "title_text": "EMBER: A Little Red Dot Candidate at z_spec=10.36 in the Seed Black Hole Era",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:18Z",
  "url": "https://research.draconitic.com/paper/0xaqvy4qhkbf9",
  "venue": "arXiv",
  "versions": []
}