{
  "abstract": "We characterise the accretion rate properties of radio-detected AGN by combining deep radio and X-ray observations of the Boötes field. We used deep international LOFAR telescope observations to identify 2840 radio-AGN across $0.3 < z \\leq 2$, divided into samples that are complete in radio luminosity. We further split this sample into four different classes: radio-quiet AGN (RQ-AGN), high-excitation radio galaxies (HERGs), and low-excitation radio galaxies (LERGs) hosted by star-forming (SF-LERGs) and quiescent galaxies (Q-LERGs). Through performing X-ray stacking, we determined the average X-ray luminosities, $L_{\\rm{X, 2-10\\,keV}}$ and average specific X-ray luminosities, $λ_{sL_{X}}$ (X-ray luminosity scaled by the stellar mass; a proxy for the accretion rate). We studied how these X-ray properties depend on radio luminosity, stellar mass, and redshift for each of the four AGN classes. We found that the LERGs, regardless of their star-formation activity, show significantly lower $L_{\\rm{X, 2-10\\,keV}}$ and $λ_{sL_{X}}$ than both HERGs and RQ-AGN across all redshifts. The average X-ray luminosities for the HERGs, RQ-AGN, and SF-LERGs typically increase with redshift, which may be associated with the increased cold gas fractions at earlier times, resulting in more enhanced black hole accretion. The average X-ray luminosities show weak-to-no correlation with radio luminosity at a given redshift, suggesting that the physical processes producing the X-ray and radio emission may not be coupled on spatial and/or temporal scales.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.04130",
  "author_total": 10,
  "authors": [
    {
      "name": "R. Kondapally"
    },
    {
      "name": "T. Holc"
    },
    {
      "name": "J. Aird"
    },
    {
      "name": "K. J. Duncan"
    },
    {
      "name": "P. N. Best"
    },
    {
      "name": "D. M. Alexander"
    },
    {
      "name": "S. Das"
    },
    {
      "name": "L. K. Morabito"
    },
    {
      "name": "S. Shenoy"
    },
    {
      "name": "D. J. B. Smith"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4zmj0dszdy41v.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.04130",
  "fulltext_url": null,
  "id": "4zmj0dszdy41v",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.04130",
  "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"
    ],
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "openalex",
      "3103|Galaxies: Formation, Evolution, Phenomena"
    ]
  ],
  "openalex": "W7208768014",
  "pdf_url": "https://arxiv.org/pdf/2609.04130",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4zmj0dszdy41v.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2609.04130",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.04130"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "Fundamental differences in the X-ray accretion properties of low and high-excitation radio galaxies",
  "title_text": "Fundamental differences in the X-ray accretion properties of low and high-excitation radio galaxies",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/4zmj0dszdy41v",
  "venue": "arXiv",
  "versions": []
}