{
  "abstract": "The Sachs-Wolfe (SW) effect, arising from large-scale structures in the universe, modifies the frequencies of gravitational waves (GWs) sourced by a cosmological background. We show that for backgrounds with $Ω_{\\rm GW}\\gtrsim 10^{-10}$, this effect imprints anisotropies and spectral distortions that can be detectable with a network of space-based interferometers (such as LISA + Taiji) and, if not taken into account, may bias the estimate of the theoretical model of the GW background. The effect is particularly enhanced in the high-frequency end of the spectrum. The SW-induced anisotropies and spectral distortions present in a GW background sourced at primordial times will correlate with the SW signature present in the CMB. Any detection of a cross-correlation between the GW anisotropies and the CMB at large scales is therefore a smoking gun for confirming the primordial nature of the background.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.14379",
  "author_total": 4,
  "authors": [
    {
      "name": "Giorgio Mentasti"
    },
    {
      "name": "Leon Vidal"
    },
    {
      "name": "Quentin Baghi"
    },
    {
      "name": "Carlo Contaldi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5f4rbede09y3h.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.14379",
  "fulltext_url": null,
  "id": "5f4rbede09y3h",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.14379",
  "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",
      "gr-qc"
    ],
    [
      "openalex",
      "3103|Pulsars and Gravitational Waves Research"
    ]
  ],
  "openalex": "W7164811980",
  "pdf_url": "https://arxiv.org/pdf/2606.14379",
  "pmcid": null,
  "pmid": null,
  "published": "2026-06-12",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5f4rbede09y3h.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:15Z",
      "native_id": "2606.14379",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.14379"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Sachs-Wolfe effect as a smoking gun for cosmological gravitational wave backgrounds",
  "title_text": "Sachs-Wolfe effect as a smoking gun for cosmological gravitational wave backgrounds",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:15Z",
  "url": "https://research.draconitic.com/paper/5f4rbede09y3h",
  "venue": "arXiv",
  "versions": []
}