{
  "abstract": "We present an Australian Square Kilometre Array Pathfinder (ASKAP) Evolutionary Map of the Universe (EMU) radio-continuum detection of the nearby spiral Seyfert I type galaxy NGC 7213 which we nickname `Sand-timer' due to its morphological appearance. We find intriguing, peculiar emission extending from the central supermassive black hole (SMBH), which we refer to as galaxy hyperbubbles and/or active galactic nucleus (AGN) jets. Finally, we find two previously undetected kiloparsec-scale features in the polarised intensity image, which appear most likely also related to the central SMBH, as restarted bipolar radio jets, though somewhat obscured in the radio-continuum total intensity image. They resemble the bow shocks often seen in Fanaroff-Riley Class II (FR-II) radio galaxies, and so we propose they most likely represent an early episode of the `Sand-timer's' AGN jet activity. An alternative scenario is that the core of NGC 7213 may be a supermassive binary black hole (SMBBH) undergoing a tidal disruption event (TDE), potentially causing the peculiar radio-continuum emission.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: 2026, The Open Journal of Astrophysics, volume 9",
  "arxiv": "2610.18285",
  "author_total": 27,
  "authors": [
    {
      "name": "M. D. Filipović"
    },
    {
      "name": "Z. J. Smeaton"
    },
    {
      "name": "B. S. Koribalski"
    },
    {
      "name": "R. Kothes"
    },
    {
      "name": "A. Ahmad"
    },
    {
      "name": "R. Z. E. Alsaberi"
    },
    {
      "name": "C. Bordiu"
    },
    {
      "name": "A. C. Bradley"
    },
    {
      "name": "E. J. Crawford"
    },
    {
      "name": "A. M. Hopkins"
    },
    {
      "name": "E. Järvelä"
    },
    {
      "name": "S. Lazarević"
    },
    {
      "name": "D. Leahy"
    },
    {
      "name": "J. L. Payne"
    },
    {
      "name": "S. F. ur Rahman"
    },
    {
      "name": "G. P. Rowell"
    },
    {
      "name": "H. Sano"
    },
    {
      "name": "M. Selby"
    },
    {
      "name": "S. S. Shabala"
    },
    {
      "name": "E. J. Stanton"
    },
    {
      "name": "S. Taziaux"
    },
    {
      "name": "K. Tsuge"
    },
    {
      "name": "D. Urosević"
    },
    {
      "name": "N. F. H. Tothill"
    },
    {
      "name": "J. Th. van Loon"
    },
    {
      "name": "V. Velović"
    },
    {
      "name": "G. L. White"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fzw1assvwybrr.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.18285",
  "fulltext_url": null,
  "id": "fzw1assvwybrr",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.18285",
  "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/2610.18285",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/fzw1assvwybrr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:32Z",
      "native_id": "2610.18285",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.18285"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "EMU detection of mysterious multiple component radio-continuum emission from nearby spiral Seyfert I type galaxy 'Sand-timer' (NGC 7213)",
  "title_text": "EMU detection of mysterious multiple component radio-continuum emission from nearby spiral Seyfert I type galaxy 'Sand-timer' (NGC 7213)",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:28Z",
  "url": "https://research.draconitic.com/paper/fzw1assvwybrr",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.33232/001c.172532",
      "pid": "a0yzd3xjbeeav",
      "relation": "published-as",
      "title": "EMU detection of mysterious multiple component radio-continuum emission from nearby spiral Seyfert I type galaxy ‘Sand-timer’ (NGC 7213)",
      "venue": "The Open Journal of Astrophysics"
    }
  ]
}