{
  "abstract": "A dark-matter core and a soft nuclear equation of state can produce similar mass--radius signatures, motivating a complementary probe through the $f$-mode spectrum. We compute quadrupolar $f$-mode frequencies and gravitational-wave damping times in full general relativity for cold, nonrotating neutron stars admixed with self-interacting bosonic dark matter (DM). Our two-fluid survey spans 21 nuclear equations of state covering nucleonic, hyperonic, $Δ$-admixed, and combined hyperon--$Δ$ compositions at $F_{\\rm DM}=1$--$20\\%$. The main sequences use $λ=π$ and boson masses of $500$ and $100\\,\\mathrm{MeV}$ for the core and halo studies, respectively. Independent normal-matter (NM) and DM displacements couple through the metric, yielding NM-led and DM-led $f$-mode branches whose radiative damping is determined by outgoing-wave boundary conditions. At $1.4\\,M_\\odot$, the core DM-led damping time decreases from order $10^3\\,\\mathrm{s}$ at $F_{\\rm DM}=1\\%$ to order $1\\,\\mathrm{s}$ at $20\\%$, approximately following an empirical $F_{\\rm DM}^{-2}$ dependence, while NM-led damping times remain within $0.12$--$0.33\\,\\mathrm{s}$. Halo DM-led damping instead increases with dark fraction: at the same stellar mass and $F_{\\rm DM}=20\\%$, dark radii approach $88\\,\\mathrm{km}$, frequencies fall to $0.14\\,\\mathrm{kHz}$, and damping times reach approximately $450\\,\\mathrm{s}$. Selected high-mass core sequences exhibit strong DM-led damping-time upturns not reproduced by the leading mass-quadrupole diagnostic. Representative core calculations show greater DM-led sensitivity to the bosonic self-coupling and retain both branches at $\\ell=3$. Under the adopted nonrotating, circular-binary prescriptions, no evaluated configuration satisfies all geometric and perturbative conditions for a controlled linear tidal resonance.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.04282",
  "author_total": 3,
  "authors": [
    {
      "name": "Prashant Thakur"
    },
    {
      "name": "Ishfaq Ahmad Rather"
    },
    {
      "name": "Y. Lim"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4nkp4wc1zhmcp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.04282",
  "fulltext_url": null,
  "id": "4nkp4wc1zhmcp",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.04282",
  "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.HE"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3103|Pulsars and Gravitational Waves Research"
    ]
  ],
  "openalex": "W7220693538",
  "pdf_url": "https://arxiv.org/pdf/2610.04282",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4nkp4wc1zhmcp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:01Z",
      "native_id": "2610.04282",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.04282"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Dark matter in neutron stars: two-fluid $f$-mode oscillations in full general relativity",
  "title_text": "Dark matter in neutron stars: two-fluid f-mode oscillations in full general relativity",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:01Z",
  "url": "https://research.draconitic.com/paper/4nkp4wc1zhmcp",
  "venue": "arXiv",
  "versions": []
}