{
  "abstract": "Einstein-cluster dark matter halos have zero radial pressure in the ideal static model. I test whether this property survives the exact finite-spin ACKN/KSZ rotating continuation, whose geodesic and scalar-wave equations are separable. Using the full metric, I require p r = 0 at every polar angle. The condition factorizes and leaves only flat or Schwarzschild seeds. Their rotating members are flat space or Kerr. Thus, a nonvacuum Einstein-cluster seed cannot remain radially pressureless in this class. If the same nonvacuum seed is kept, the rotating metric instead generates a negative radial principal stress, with leading behavior O ( a 2 ). For a relativistic Hernquist halo, I evaluate the ratio | p r |/ ρ h exactly at r = 10 M and a / M = 0.3 . The three published benchmarks give 2.36 × 10 − 3 , 2.27 × 10 − 2 , and 1.23 × 10 − 1 . The weak-halo estimate underpredicts the first two values by about 50%. Therefore, in the ACKN/KSZ class, preserving separability does not preserve the ideal Einstein-cluster matter source.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 1,
  "authors": [
    {
      "name": "Mohsen Fathi",
      "orcid": "0000-0002-1602-0722"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fm5y3r4j41jnh.bib",
  "cited_by": 0,
  "doi": "10.1016/j.physletb.2026.141077",
  "fulltext_url": "http://www.sciencedirect.com/science/article/pii/S0370269326009275",
  "id": "fm5y3r4j41jnh",
  "issns": [
    "0370-2693",
    "1873-2445"
  ],
  "landing_url": "https://linkinghub.elsevier.com/retrieve/pii/S0370269326009275",
  "language": "en",
  "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": null,
  "native_subjects": [
    [
      "lcc",
      "QC1-999"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7222873372",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-30",
  "publisher": "Elsevier BV",
  "ris": "https://research.draconitic.com/paper/fm5y3r4j41jnh.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:06Z",
      "native_id": "10.1016/j.physletb.2026.141077",
      "source": "crossref",
      "url": "https://linkinghub.elsevier.com/retrieve/pii/S0370269326009275"
    },
    {
      "first_seen": "2026-10-30T13:44:37Z",
      "native_id": "e78f99b191ad431094d114f5c1366641",
      "source": "doaj",
      "url": "https://doi.org/10.1016/j.physletb.2026.141077"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Cosmology and Gravitation Theories",
      "subfield": "cosmology"
    }
  ],
  "title": "Radial stress in rotating ACKN/KSZ continuations of Einstein-cluster dark matter halos",
  "title_text": "Radial stress in rotating ACKN/KSZ continuations of Einstein-cluster dark matter halos",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T13:44:37Z",
  "url": "https://research.draconitic.com/paper/fm5y3r4j41jnh",
  "venue": "Physics Letters B",
  "versions": []
}