{
  "abstract": "We investigate the interplay between radial velocity anisotropy and internal rotation in self-gravitating systems characterised by initial spherical symmetry and a moderate density cusp. We study the stability properties of such configurations to disentangle the impact of anisotropy, rotation, and density structure on the formation of triaxial stellar systems. We perform a set of collisionless $N$-body simulations starting from initial equilibria with a phase space distribution function of the class introduced by Osipkov and Merritt, modified to impose a net global angular momentum with the Lynden-Bell daemon protocol. We analyse the growth of the density and phase space distribution modes, as well as the axial ratios and triaxiality index of the final configurations. We find that internal rotation has a mitigating effect on the strength of the radial orbit instability in radially anisotropic models with \\mbox{Fridman-Polyachenko-Shukhman} anisotropy index close to the consistency limit, while it slightly enhances the onset of the instability in marginally stable models. From the analysis of the growth rate of the density modes, we also find that an inner bar, which for maximally rotating initial conditions declines after its initial growth, is formed even in systems with initial profiles with a central density cusp.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.17763",
  "author_total": 2,
  "authors": [
    {
      "name": "Pierfrancesco Di Cintio"
    },
    {
      "name": "Anna Lisa Varri"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8ka7s5emwnb0t.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.17763",
  "fulltext_url": null,
  "id": "8ka7s5emwnb0t",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.17763",
  "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/2607.17763",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-19",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8ka7s5emwnb0t.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:52Z",
      "native_id": "2607.17763",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.17763"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "The stability of radially anisotropic rotating stellar systems with a central density cusp",
  "title_text": "The stability of radially anisotropic rotating stellar systems with a central density cusp",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:41Z",
  "url": "https://research.draconitic.com/paper/8ka7s5emwnb0t",
  "venue": "arXiv",
  "versions": []
}