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The Primordial power spectrum from the largest to smallest CMB scales — arXiv:2608.24413

Source: arXiv (en)
Original: https://arxiv.org/abs/2608.24413
License (as archived): CC0-1.0
Archived: 2026-10-18T07:22:13.147Z
SHA-256 of the archived text: fa7067177f590a59c188ba98136ecee059d5630ea3eb45310f612e16b816aaa5
Stable URL of this page: https://metraipolis.com/documento/dc_59a08e08ecfa

How to cite

The Primordial power spectrum from the largest to smallest CMB scales — arXiv:2608.24413 — arXiv (en), https://arxiv.org/abs/2608.24413 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_59a08e08ecfa (Metraipolis archive dc_59a08e08ecfa, sha256 fa7067177f590a59c188ba98136ecee059d5630ea3eb45310f612e16b816aaa5)

BibTeX

@misc{dc59a08e08ecfa,
  title = {The Primordial power spectrum from the largest to smallest CMB scales — arXiv:2608.24413},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2608.24413},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_59a08e08ecfa; sha256 fa7067177f590a59c188ba98136ecee059d5630ea3eb45310f612e16b816aaa5},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2608.24413. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

We reconstruct the primordial power spectrum (PPS) across the full range of cosmological scales accessible to Cosmic Microwave Background (CMB) observations. Using the Modified Richardson--Lucy algorithm, we perform free-form reconstructions through deconvolution of Planck PR3 and PR4, Atacama Cosmology Telescope (ACT) DR6, and South Pole Telescope 3G (SPT-3G) D1 data. Across different regularization schemes, we find no evidence for significant deviations from a power-law primordial spectrum. The reconstructed spectra show a strong correlation between Planck and ACT, even at the level of localized features over their overlapping range, $0.07 < k < 0.14\,\mathrm{Mpc}^{-1}$, demonstrating consistency between the two observations. Using a complementary parametric Bayesian reconstruction, we find that the previously discussed preference for a blueward tilt in the ACT data at small scales is preferred only at the $1\sigma$ level.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-08-26 in astro-ph.CO).
Categorie arXiv: Cosmology and Nongalactic Astrophysics (astro-ph.CO) ; High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Theory (hep-th).
Pagina del lavoro: https://arxiv.org/abs/2608.24413 — 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 2026-10-18T07:18:24.754Z dalla pagina https://arxiv.org/catchup/astro-ph.CO/2026-08-26?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).