{
  "abstract": "MAGNHIFFIC (MeerKAT AGN HI Feeding & Feedback Investigation close-by) leverages on sensitive MeerKAT 21-cm and VLT Survey Telescope (VST) observations of nearby Active Galactic Nuclei (AGN) to study feeding and feedback from the circum-nuclear ($\\lesssim 1$ kpc) to the circum-galactic scales ($\\gtrsim 10$ kpc). In nearby ($D\\sim38$~Mpc) radio galaxy NGC 3100, these observations reveal, for the very first time, a starless filament of neutral atomic hydrogen ($M_{\\rm H {\\hskip 0.02cm \\tt I}}\\sim 3.4\\times 10^8 {\\rm M}_\\odot$) extending from its outskirts ($\\sim 340$ kpc) down to its innermost kiloparsecs. The kinematical properties of the filament show it likely formed by gas stripped from dwarf galaxy MKT095931-312323, flying by NGC 3100 $\\gtrsim 0.5$ Gyr ago. The filament appears to replenish the cold-gas reservoir of NGC 3100's circum-nuclear disk traced by archival $^{12}$CO images as well as by HI absorption. The kinematics of the HI absorption and of the $^{12}$CO(3--2) show that, in the very centre, the jets are currently stirring the multi-phase gas while dense clouds may still fall into the SMBH. The coexistence of a surviving cold reservoir, compact inner atomic/molecular clouds, and localised jet-driven heating indicates that AGN feeding and feedback operate simultaneously rather than as separate evolutionary phases.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.34071",
  "author_total": 14,
  "authors": [
    {
      "name": "F. M. Maccagni"
    },
    {
      "name": "I. Prandoni"
    },
    {
      "name": "F. Fonzo"
    },
    {
      "name": "J. Healy"
    },
    {
      "name": "A. Loni"
    },
    {
      "name": "R. Ragusa"
    },
    {
      "name": "I. Ruffa"
    },
    {
      "name": "W. J. G. de Blok"
    },
    {
      "name": "M. Gaspari"
    },
    {
      "name": "P. Serra"
    },
    {
      "name": "F. Barbani"
    },
    {
      "name": "E. Iodice"
    },
    {
      "name": "D. Kleiner"
    },
    {
      "name": "M. Spavone"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/apb16k2vzscya.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.34071",
  "fulltext_url": null,
  "id": "apb16k2vzscya",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.34071",
  "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/2610.34071",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-25",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/apb16k2vzscya.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2610.34071",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.34071"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "A MAGNHIFFIC cold-gas filament fuelling the nuclear activity of NGC 3100",
  "title_text": "A MAGNHIFFIC cold-gas filament fuelling the nuclear activity of NGC 3100",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/apb16k2vzscya",
  "venue": "arXiv",
  "versions": []
}