{
  "abstract": "We present an analysis of the polarized synchrotron emission at the power-spectrum level in the multipole range $30 < \\ell < 130$, using the recent QUIJOTE-MFI wide survey (10-20GHz) in combination with Planck and WMAP data. The EE and BB power spectra are well described by a simple power-law model, with no evidence for the need of additional parameters. The best-fit slopes are $α_{EE} = -3.24 \\pm 0.12$ and $α_{BB} = -3.81 \\pm 0.34$ for $|b|>20^\\circ$, hinting toward a steepening of the BB spectrum relative to EE at the $\\sim 1.6σ$ level. The synchrotron frequency spectral indices are found to be $β_s^{EE} = -3.26 \\pm 0.05$ and $β_s^{BB} = -3.25 \\pm 0.10$ for the same cut, in agreement with earlier real-space analyses. We find no evidence for spatial variations of $β_s$ across different Galactic latitude cuts, within current uncertainties. The synchrotron BB/EE power ratio is approximately 0.2 over the considered multipole range, lower than typical values for thermal dust, and consistent with previous measurements. We also measure a dust-synchrotron spatial correlation in the range 0.1-0.25 over $30 < \\ell < 130$. Using these results, we estimate the level of synchrotron contamination in future CMB B-mode measurements, finding an average power in the considered sky masks equivalent to $r \\sim 0.003$ at 90GHz and $r \\sim 0.0002$ at 150GHz for the relevant angular scales.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.31469",
  "author_total": 22,
  "authors": [
    {
      "name": "F. Vansyngel"
    },
    {
      "name": "J. A. Rubino-Martin"
    },
    {
      "name": "P. de Ferra"
    },
    {
      "name": "R. B. Barreiro"
    },
    {
      "name": "R. T. Genova-Santos"
    },
    {
      "name": "B. Casaponsa"
    },
    {
      "name": "M. Fernandez-Torreiro"
    },
    {
      "name": "D. Adak"
    },
    {
      "name": "K. Aryan"
    },
    {
      "name": "M. Ashdown"
    },
    {
      "name": "J. M. Casas"
    },
    {
      "name": "F. J. Casas"
    },
    {
      "name": "R. Cepeda-Arroita"
    },
    {
      "name": "A. Fasano"
    },
    {
      "name": "D. Herranz"
    },
    {
      "name": "E. Martinez-Gonzalez"
    },
    {
      "name": "F. Poidevin"
    },
    {
      "name": "R. Rebolo"
    },
    {
      "name": "B. Ruiz-Granados"
    },
    {
      "name": "D. Tramonte"
    },
    {
      "name": "P. Vielva"
    },
    {
      "name": "R. A. Watson"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dy3t12021cy88.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.31469",
  "fulltext_url": null,
  "id": "dy3t12021cy88",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.31469",
  "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",
      "astro-ph.CO"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.31469",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dy3t12021cy88.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:34Z",
      "native_id": "2610.31469",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.31469"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    }
  ],
  "title": "QUIJOTE scientific results - XII. Characterization of the polarized synchrotron emission at the power spectrum level in the QUIJOTE-MFI wide survey",
  "title_text": "QUIJOTE scientific results - XII. Characterization of the polarized synchrotron emission at the power spectrum level in the QUIJOTE-MFI wide survey",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:34Z",
  "url": "https://research.draconitic.com/paper/dy3t12021cy88",
  "venue": "arXiv",
  "versions": []
}