{
  "abstract": "Dark Energy Spectroscopic Instrument (DESI) Collaboration reported an evidence for dynamical dark energy model using baryon acoustic oscillation (BAO) measurements from DESI Data Release 2 (DR2), cosmic microwave background (CMB), and three Type Ia Supernovae (SNe) data (Pantheon+, Union3, and DES-SN5YR) recently. The significances are from $2.8\\sim4.2σ$ depending on which SNe sample is used, and the highest significance is obtained based on the DES-SN5YR data. But more recently, Dark Energy Survey (DES) Collaboration recalibrated the DES-SN5YR data, and a significance of only $3.2σ$ is obtained based on the calibrated data, which is called DES-Dovekie. In this work, we perform a comprehensive analysis of five representative dynamical dark energy parametrization models, including Chevallier-Polarski-Linder (CPL), Barboza-Alcaniz (BA), exponential (EXP), logarithmic (LOG), and Jassal-Bagla-Padmanabhan (JBP), using DESI DR2 BAO, Planck CMB, ACT DR6, and SNe data from Pantheon+, Union3, and DES-Dovekie. Similarly, a significance of around $3σ$ is obtained based on the DES-Dovekie data. And the significances are $2.1\\sim3.7σ$ for different SNe samples and different parametrization models, indicating an evolutionary dark energy dynamics. Furthermore, a phantom-like behavior in the past and has transitioned into quintessence-like behavior today for the dynamical dark energy is preferred.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.10567",
  "author_total": 3,
  "authors": [
    {
      "name": "Pin Wang"
    },
    {
      "name": "Ping Wang"
    },
    {
      "name": "Jielei Zhang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/82mspgftrj2bp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.10567",
  "fulltext_url": null,
  "id": "82mspgftrj2bp",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.10567",
  "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",
      "physics.gen-ph"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7212267545",
  "pdf_url": "https://arxiv.org/pdf/2609.10567",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/82mspgftrj2bp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:26Z",
      "native_id": "2609.10567",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.10567"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Cosmology and Gravitation Theories",
      "subfield": "cosmology"
    }
  ],
  "title": "Study of dynamical dark energy using DESI DR2 BAO, CMB, and Type Ia Supernovae data",
  "title_text": "Study of dynamical dark energy using DESI DR2 BAO, CMB, and Type Ia Supernovae data",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:26Z",
  "url": "https://research.draconitic.com/paper/82mspgftrj2bp",
  "venue": "arXiv",
  "versions": []
}