{
  "abstract": "We investigate whether current astrophysical data constrain not only the high-density continuation of the neutron star equation of state, but also the low density matching procedure itself. To this end, we compare two low density branches propagated through a common high density extension and confront them with direct NICER mass-radius posteriors, a lower bound on the maximum mass and an effective constraint on $Λ_{1.4}$. We find that the observable predictions of the two branches remain strongly overlapping, while the NICER-informed posterior still induces a nontrivial constraint on the matching parameters. Current data therefore constrain primarily the shared continuation above $n_1$, but also indirectly restrict the low density matching sector.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Astronomy & Astrophysics, 713, A34 (2026)",
  "arxiv": "2606.07731",
  "author_total": 1,
  "authors": [
    {
      "name": "Federico Nola"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/722w0qyw1y3nc.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.07731",
  "fulltext_url": null,
  "id": "722w0qyw1y3nc",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.07731",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "arxiv",
      "nucl-th"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2606.07731",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/722w0qyw1y3nc.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2606.07731",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.07731"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "NICER constraints on low density matching and high density continuation in neutron star equations of state",
  "title_text": "NICER constraints on low density matching and high density continuation in neutron star equations of state",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/722w0qyw1y3nc",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1051/0004-6361/202659810",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}