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Model-independent and reconstruction-free evidence for cosmic acceleration from DESI baryon acoustic oscillations — arXiv:2610.40785

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.40785
License (as archived): CC0-1.0
Archived: 2026-11-03T08:29:56.056Z
SHA-256 of the archived text: 963cc1b00855ab64a79842ea72a631291811d785d347aafd222df9365778e9e4
Stable URL of this page: https://metraipolis.com/documento/dc_6e30ec797464

How to cite

Model-independent and reconstruction-free evidence for cosmic acceleration from DESI baryon acoustic oscillations — arXiv:2610.40785 — arXiv (en), https://arxiv.org/abs/2610.40785 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_6e30ec797464 (Metraipolis archive dc_6e30ec797464, sha256 963cc1b00855ab64a79842ea72a631291811d785d347aafd222df9365778e9e4)

BibTeX

@misc{dc6e30ec797464,
  title = {Model-independent and reconstruction-free evidence for cosmic acceleration from DESI baryon acoustic oscillations — arXiv:2610.40785},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.40785},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_6e30ec797464; sha256 963cc1b00855ab64a79842ea72a631291811d785d347aafd222df9365778e9e4},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.40785. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

While there is ample evidence that the universe's expansion is accelerating, most of this evidence relies on assuming a shape of the relative expansion rate, $H(z)/H_0$, informed by a cosmological model or a kinematical approach. Model-independent analyses are common for supernova datasets but rarely applied to other data. In this work, we use uncalibrated baryon acoustic oscillations (BAO) from DESI DR2 for a model-independent test of acceleration, which makes no assumptions about the theory of gravity or the energy content of the universe. We test for cosmic acceleration with three model-independent statistics that rely purely on the measured Alcock-Paczyński parameter, the isotropic BAO, and the line-of-sight BAO, and do not require any reconstruction between redshift bins unlike previous analyses. Accounting for the look-elsewhere effect, among all statistics we find $2.4\sigma$ - $4.1\sigma$ evidence for cosmic acceleration within $0 \leq z \leq 0.934$ when assuming flatness; allowing for spatial curvature, $|\Omega_k| \leq 1$, at least two of the three statistics retain $2.4\sigma$ - $3.5\sigma$.

Tema degli esploratori: fisica e astronomia (elenco arXiv astro-ph.CO, nuovi lavori del giorno).
Categorie arXiv: Cosmology and Nongalactic Astrophysics (astro-ph.CO).
Pagina del lavoro: https://arxiv.org/abs/2610.40785 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-11-03T08:12:23.786Z dalla pagina https://arxiv.org/list/astro-ph.CO/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).