{
  "abstract": "Wave cold dark matter (wave CDM) is a well-motivated variant within the collisionless CDM paradigm, in which the de~Broglie wavelengths of ultralight bosons become relevant on galactic scales. While many of the previous tests of wave CDM have focused on small-scale tensions involving solitonic cores and certain soliton--halo relations in galaxies, the radial acceleration relation (RAR) provides a complementary test: for a given baryonic mass distribution, it probes whether the DM halo can reproduce the observed total gravitational field. In this work we test wave CDM against the RAR using eight X-ray elliptical galaxies from the compilation of Lelli et al. We perform a suite of 3D Schrödinger--Poisson simulations and evolve the wave-CDM halos to virialized quasi-stationary states. For each galaxy and each adopted boson mass, we select the realization whose final snapshot most closely matches the empirical RAR. We find that the selected wave-CDM realizations for these elliptical galaxies can reproduce the RAR without including baryonic feedback or dark-matter self-interactions. At the boson mass $m_a=10^{-23}$eV, the combined fit to the eight galaxies gives $a_0=1.19\\times10^{-10}\\,\\mathrm{m\\,s^{-2}}$, consistent with the canonical value inferred from disk galaxies. When the boson mass is varied over $3\\times 10^{-24}$ eV $\\le m_a \\le 2\\times 10^{-23}$ eV, the best-fit value of $a_0$ changes by only $\\sim 11\\%$, and this variation shows no systematic trend with $m_a$. This insensitivity to boson mass arises because, over the radial range relevant for the RAR, the virialized halos are supported mainly by their velocity field, whereas the boson-mass-dependent quantum-pressure term is dynamically subdominant. These results show that wave CDM can reproduce the RAR in elliptical galaxies, and provide a new galactic-scale test of the model beyond the previous focus on solitonic cores.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.18969",
  "author_total": 2,
  "authors": [
    {
      "name": "Runyu Meng"
    },
    {
      "name": "Xiaobo Dong"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8r4qzqg6f5g6f.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.18969",
  "fulltext_url": null,
  "id": "8r4qzqg6f5g6f",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.18969",
  "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/2610.18969",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8r4qzqg6f5g6f.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:31Z",
      "native_id": "2610.18969",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.18969"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "Wave Cold Dark Matter Can Reproduce the Radial Acceleration Relation in X-ray Elliptical Galaxies",
  "title_text": "Wave Cold Dark Matter Can Reproduce the Radial Acceleration Relation in X-ray Elliptical Galaxies",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:31Z",
  "url": "https://research.draconitic.com/paper/8r4qzqg6f5g6f",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1088/1674-4527/aeac08",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}