{
  "abstract": "We investigate the question whether compact objects in the so-called mass gap ($2.5 < M/M_\\odot < 5.0$) can be neutron stars or hybrid stars. Using a generic hybrid star equation of state with a first-order deconfinement transition, we map the allowed parameter space in a Seidov-type diagram and confront it with modern mass-radius constraints. We find that mass-gap hybrid stars require an extremely early onset of deconfinement and very stiff quark matter. The Bayesian analysis, however, favors equations of state with deconfinement at typical neutron-star masses around $1.4\\,M_\\odot$ with mass-twin stars that, if confirmed, would rule out hybrid stars as candidates for observed mass-gap compact objects.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.02593",
  "author_total": 5,
  "authors": [
    {
      "name": "Alexander Ayriyan"
    },
    {
      "name": "David Blaschke"
    },
    {
      "name": "Marcin Dubaj"
    },
    {
      "name": "Oleksandr Vitiuk"
    },
    {
      "name": "Adrian Wojcik"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0zkzt9ygnth2t.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.02593",
  "fulltext_url": null,
  "id": "0zkzt9ygnth2t",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.02593",
  "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"
    ],
    [
      "arxiv",
      "nucl-th"
    ],
    [
      "openalex",
      "3103|Pulsars and Gravitational Waves Research"
    ]
  ],
  "openalex": "W7163392501",
  "pdf_url": "https://arxiv.org/pdf/2606.02593",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0zkzt9ygnth2t.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:28:36Z",
      "native_id": "2606.02593",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.02593"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    },
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "Hybrid neutron stars among mass gap objects are excluded by twin stars at $1.4\\,M_\\odot$",
  "title_text": "Hybrid neutron stars among mass gap objects are excluded by twin stars at 1.4 M_⊙",
  "type": "preprint",
  "updated_at": "2026-10-30T12:28:36Z",
  "url": "https://research.draconitic.com/paper/0zkzt9ygnth2t",
  "venue": "arXiv",
  "versions": []
}