{
  "abstract": "The dispersal of chemically enriched gas from galaxies into their surroundings is a key process in galaxy evolution, yet direct observational evidence at z>5 remains scarce. We present AEON-z5, a galaxy at z~5.23 in the COSMOS field comprising a compact continuum-emitting core surrounded by an extended, line-dominated ionized nebula. JWST/NIRCam imaging shows that H$α$+[N II] and H$β$+[O III] emission extends to projected radii of >4 kpc - 2-2.5 times the typical effective radius at the host stellar mass - reaching the outer ISM and the inner CGM. F444W grism data reveal a highly asymmetric H$α$+[N II] profile, which we interpret as a bipolar outflow and decompose into three kinematic components. The dominant component has a flux-weighted velocity offset of ~+489 km/s and FWHM~630 km/s, with a wing reaching $v_{84}$~792 km/s. A tentative detached feature at $Δv_{LOS}$~2800 km/s, detected at 1.5$σ$ in the 1D spectrum (2.4$σ$ in the 2D fit), may trace an outflow clump. These kinematics are most coherently explained by an AGN in the core. For the extended nebula, we derive a velocity curve shifting redward with radius, reaching 200-400 km/s at $r_p$~1.3-2.5 kpc - a trend that may reflect an accelerating outflow, corotating gas, or recycled inflow viewed in projection. Crucially, the measured [N II]/H$α$ ratios imply near-solar N2-based abundances (0.7-1.0 $Z_\\odot$), remaining >0.37 $Z_\\odot$ after allowing for AGN excitation and calibration systematics. The combination of large extent, enrichment, and extreme kinematics identifies AEON-z5 as a candidate snapshot of feedback-driven metal transport, offering a direct view of how early AGN activity may redistribute chemically processed gas into the CGM within the first ~1.1 billion years.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.08264",
  "author_total": 9,
  "authors": [
    {
      "name": "Xiaoyang Wei"
    },
    {
      "name": "Zheng Cai"
    },
    {
      "name": "Shiwu Zhang"
    },
    {
      "name": "Fujiang Yu"
    },
    {
      "name": "Yunjing Wu"
    },
    {
      "name": "Shuaiyi Li"
    },
    {
      "name": "Xiaojing Lin"
    },
    {
      "name": "Mingyu Li"
    },
    {
      "name": "Xuelun Mei"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8akgr12ap5r7n.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.08264",
  "fulltext_url": null,
  "id": "8akgr12ap5r7n",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.08264",
  "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|Galaxies: Formation, Evolution, Phenomena"
    ]
  ],
  "openalex": "W7212052429",
  "pdf_url": "https://arxiv.org/pdf/2609.08264",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8akgr12ap5r7n.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:49Z",
      "native_id": "2609.08264",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.08264"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "AEON-z5: A Candidate AGN-driven Outflow Enriching the Circumgalactic Medium at $z\\simeq5.23$",
  "title_text": "AEON-z5: A Candidate AGN-driven Outflow Enriching the Circumgalactic Medium at z≃5.23",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:49Z",
  "url": "https://research.draconitic.com/paper/8akgr12ap5r7n",
  "venue": "arXiv",
  "versions": []
}