{
  "abstract": "We utilize the kinetic Sunyaev–Zeldovich effect (kSZ) to measure the rotation of ionized gas within galaxy groups defined in the Sloan Digital Sky Survey Data Release 7 (SDSS-DR7) galaxy sample, via their dipolar imprint on the cosmic microwave background (CMB). We estimate the direction of the projected angular momentum for each of our selected fast-rotating groups by measuring the redshift dipole of satellite galaxies around their group centres. We find a clear redshift dipole in the stacked data for the selected SDSS groups. We then perform oriented stacking of the Planck CMB temperature map using the group centres and directions of angular momenta. We report a $2.3\\sigma$ tentative detection of the dipolar rotational kSZ effect (rkSZ) within the virial radii of our fast-rotating groups from SDSS with an average mass of $10^{14}\\, h^{-1}{\\rm M}_\\odot$ (corresponding to a null-hypothesis probability of 0.96 per cent). We estimate the averaged rotational velocity of the sample to be $\\sim$$100\\!-\\!200\\, {\\rm km\\, s}^{-1}$, reaching a maximum value of $158.8\\pm 13.6 \\, {\\rm km\\, s}^{-1}$. Our results are consistent within the errors with predictions based on the ELUCID constrained realization simulation, with the predicted amplitude of the rkSZ signal being slightly lower near the centre. We also identify a systematic bias when estimating rotational velocities using the observed redshifts of galaxies, but find it to be subdominant for our analysis.",
  "abstract_shown": true,
  "affiliations": [
    "Astrophysics Research Institute, Liverpool John Moores University , Liverpool L3 5RF ,",
    "Institute for Astronomy, University of Edinburgh, Royal Observatory , Blackford Hill, Edinburgh EH9 3HJ ,",
    "Departamento de Física Teórica, Módulo 15, Facultad de Ciencias, Universidad Autónoma de Madrid , E-28049 Madrid ,",
    "Centro de Investigación Avanzada en Física Fundamental (CIAFF), Facultad de Ciencias, Universidad Autónoma de Madrid , E-28049 Madrid ,",
    "Department of Physics and Astronomy, University of the Western Cape , Bellville, Cape Town 7535 ,",
    "Department of Astronomy, University of Massachusetts , Amherst, MA 01003-9305 ,",
    "Department of Astronomy, University of Science and Technology of China , Hefei, Anhui 230026 ,",
    "State Key Laboratory of Dark Matter Physics, Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University , Shanghai 201210 ,"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Tianyi Yang",
      "orcid": "0000-0003-0670-3447"
    },
    {
      "affs": [
        1
      ],
      "name": "Yan-Chuan Cai"
    },
    {
      "affs": [
        1,
        2,
        3
      ],
      "name": "Weiguang Cui",
      "orcid": "0000-0002-2113-4863"
    },
    {
      "affs": [
        1
      ],
      "name": "John A Peacock",
      "orcid": "0000-0002-1168-8299"
    },
    {
      "affs": [
        1,
        4
      ],
      "name": "Romeel Davé",
      "orcid": "0000-0003-2842-9434"
    },
    {
      "affs": [
        5
      ],
      "name": "Houjun Mo"
    },
    {
      "affs": [
        6
      ],
      "name": "Huiyuan Wang"
    },
    {
      "affs": [
        7
      ],
      "name": "Xiaohu Yang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8xj1w3zj7we7p.bib",
  "cited_by": 0,
  "doi": "10.1093/mnras/stag1943",
  "fulltext_url": null,
  "id": "8xj1w3zj7we7p",
  "issns": [
    "0035-8711",
    "1365-2966"
  ],
  "landing_url": "https://academic.oup.com/mnras/article/doi/10.1093/mnras/stag1943/8914600",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3103|Galaxies: Formation, Evolution, Phenomena"
    ]
  ],
  "openalex": "W7221697865",
  "pdf_url": "https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stag1943/71915212/stag1943.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-13",
  "publisher": "Oxford University Press (OUP)",
  "ris": "https://research.draconitic.com/paper/8xj1w3zj7we7p.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:17Z",
      "native_id": "10.1093/mnras/stag1943",
      "source": "crossref",
      "url": "https://academic.oup.com/mnras/article/doi/10.1093/mnras/stag1943/8914600"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Galaxies: Formation, Evolution, Phenomena",
      "subfield": "galaxies"
    }
  ],
  "title": "A possible detection of gas rotation in galaxy groups via the kinetic Sunyaev–Zeldovich effect",
  "title_text": "A possible detection of gas rotation in galaxy groups via the kinetic Sunyaev–Zeldovich effect",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:17Z",
  "url": "https://research.draconitic.com/paper/8xj1w3zj7we7p",
  "venue": "Monthly Notices of the Royal Astronomical Society",
  "versions": []
}