{
  "abstract": "We initiate a systematic cosmological investigation of an axio-dilaton system governed by a curved field-space metric as generically motivated by supergravity and string compactifications. The scalar sector consists of a light scalar dilaton field evolving along an asymptotically exponential potential and a pseudoscalar field spanning an essentially flat direction, kinetically coupled through an exponential field-space metric. Deviations from the asymptotic regime are incorporated by introducing a generalised Albrecht-Skordis potential containing a polynomial factor. Utilising a dynamical systems approach alongside numerical evolution and Bayesian inference, we constrain the model using Type Ia Supernovae (SNe Ia), Baryon Acoustic Oscillations (BAO) and Planck 2018 distance-prior data. We identify a parameter degeneracy indicating that steeper potentials demand stronger field-space kinetic couplings to sustain late-time cosmic acceleration. Finally, a joint likelihood analysis reveals that while the model successfully accounts for dark energy dynamics, it is only slightly statistically favoured over $Λ$CDM by current observations.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.22539",
  "author_total": 4,
  "authors": [
    {
      "name": "Mario Ramos-Hamud"
    },
    {
      "name": "Gabriela García-Arroyo"
    },
    {
      "name": "Fernando Quevedo"
    },
    {
      "name": "J. Alberto Vázquez"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7eagh77smcdvf.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.22539",
  "fulltext_url": null,
  "id": "7eagh77smcdvf",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.22539",
  "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.CO"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7214053099",
  "pdf_url": "https://arxiv.org/pdf/2609.22539",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-18",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7eagh77smcdvf.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2609.22539",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.22539"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Axio-Dilaton Dark Energy: A Dynamical Systems and Bayesian Inference Analysis",
  "title_text": "Axio-Dilaton Dark Energy: A Dynamical Systems and Bayesian Inference Analysis",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/7eagh77smcdvf",
  "venue": "arXiv",
  "versions": []
}