{
  "abstract": "We present measurements of galaxy spin-filament alignments at 0.20 < z < 0.42 using the MAGPI Survey, exploiting resolved stellar and ionised gas kinematics to reconstruct 3D spin axes. Cosmic filaments are identified using a stellar mass-matched constant-number-density population from the GAMA, MAGPI Redshift Survey and DESI datasets. We detect a flipping of the statistical alignment signal at z ∼ 0.3 as a function of M⋆: low-mass galaxies preferentially exhibit spins parallel to the direction of their host filaments, while high-mass galaxies tend towards perpendicular orientations. The transition mass is measured to be log (M⋆, t/M⊙) ≃ 10.8, approximately 0.6 dex higher than the value for the SAMI Galaxy Survey at z ∼ 0.05. Bootstrap analysis gives 99.5% confidence that the transition mass is higher for MAGPI than SAMI. At fixed stellar mass MAGPI galaxies exhibit stronger parallel alignments than their SAMI counterparts, suggesting evolution of spin–filament alignments over the past ∼ 3 Gyr. The gaseous component in MAGPI galaxies is more closely aligned with filaments than the stellar component, relative to a M⋆-matched SAMI sample. This indicates a stronger coupling between ionised gas and the large-scale structure at z ∼ 0.3, consistent with coherent gas accretion onto filaments remaining efficient at higher M⋆. At z ∼ 0 we detect a transition toward perpendicular alignments at lower M⋆, while the gas and stellar components exhibit similar alignments relative to filaments, likely due to the cumulative effects of mergers and secular evolution.",
  "abstract_shown": true,
  "affiliations": [
    "Sydney Institute for Astronomy (SIfA), School of Physics, The University of Sydney , NSW 2006 ,",
    "International Centre for Radio Astronomy Research, University of Western Australia , 7 Fairway, Crawley, WA 6009 ,",
    "Research School of Astronomy and Astrophysics, Australian National University , Cotter Road, Weston Creek, ACT 2611 ,",
    "School of Physics, University of New South Wales , Sydney, NSW 2052 ,",
    "Institute for Computational Cosmology, Durham University Department of Physics, , South Road, Durham DH13LE ,",
    "Centre for Extragalactic Astronomy, Durham University Department of Physics, , South Road, Durham DH13LE ,",
    "School of Mathematical and Physical Sciences, Macquarie University , Sydney, NSW 2109 ,",
    "Astrophysics and Space Technologies Research Centre , Macquarie University, Sydney, NSW 2109 ,",
    "Tartu Observatory, University of Tartu , Observatooriumi 1, 61602, Tõravere ,",
    "Instituto de Astrofísica e Ciências do Espaço - Centro de Astrofísica da Universidade do Porto , Rua das Estrelas, 4150-762 Porto ,",
    "School of Mathematics and Physics, University of Queensland , St Lucia, Queensland 4072 ,",
    "Institut d’Astrophysique de Paris, UMR 7095, CNRS, and Sorbonne Université , 98 bis boulevard Arago, 75014 Paris ,",
    "Universitäts-Sternwarte, Fakultät für Physik, Ludwig-Maximilians-Universität München , Scheinerstr. 1, 81679 München ,",
    "Centre for Astrophysics, and Supercomputing, Swinburne University of Technology , Hawthorn, VIC 3122 ,",
    "University of Strasbourg, CNRS UMR 7550, Observatoire astronomique de Strasbourg , F-67000 Strasbourg ,",
    "SISSA – International School for Advanced Studies , Via Bonomea 265, I-34136 Trieste ,",
    "UWC – University of the Western Cape , Department of Physics and Astronomy, Cape Town 7535 ,",
    "IFPU – Institute for Fundamental Physics of the Universe , Via Beirut, 2, 34151 Trieste ,",
    "INFN – Sezione di Trieste , via Valerio 2, I-34127 Trieste ,",
    "University of Vienna Department of Astrophysics, , Türkenschanzstraße 17, 1180 Vienna ,",
    "INAF – Osservatorio Astronomico di Trieste , Via Tiepolo 11, I-34131 Trieste ,"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 23,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Stefania Barsanti",
      "orcid": "0000-0002-9332-5386"
    },
    {
      "affs": [
        1,
        2
      ],
      "name": "Andrew J Battisti",
      "orcid": "0000-0003-4569-2285"
    },
    {
      "affs": [
        1
      ],
      "name": "Sabine Bellstedt",
      "orcid": "0000-0003-4169-9738"
    },
    {
      "affs": [
        2
      ],
      "name": "Matthew Colless",
      "orcid": "0000-0001-9552-8075"
    },
    {
      "affs": [
        0
      ],
      "name": "Scott M Croom",
      "orcid": "0000-0003-2880-9197"
    },
    {
      "affs": [
        3
      ],
      "name": "Caroline Foster",
      "orcid": "0000-0003-0247-1204"
    },
    {
      "affs": [
        4,
        5
      ],
      "name": "Katherine E Harborne",
      "orcid": "0000-0002-2043-7985"
    },
    {
      "affs": [
        1
      ],
      "name": "Claudia D P Lagos"
    },
    {
      "affs": [
        2
      ],
      "name": "J Trevor Mendel"
    },
    {
      "affs": [
        6,
        7
      ],
      "name": "Matt S Owers",
      "orcid": "0000-0002-2879-1663"
    },
    {
      "affs": [
        8
      ],
      "name": "Elmo Tempel",
      "orcid": "0000-0002-5249-7018"
    },
    {
      "affs": [
        2
      ],
      "name": "Emily Wisnioski",
      "orcid": "0000-0003-1657-7878"
    },
    {
      "affs": [
        9
      ],
      "name": "Iris Breda",
      "orcid": "0000-0002-3764-5780"
    },
    {
      "affs": [
        10
      ],
      "name": "Pratyush K Das"
    },
    {
      "affs": [
        11
      ],
      "name": "Clotilde Laigle"
    },
    {
      "affs": [
        12,
        13
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      "name": "Rhea-Silvia Remus"
    },
    {
      "affs": [
        14,
        15,
        16,
        17,
        18
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      "name": "Gauri Sharma",
      "orcid": "0000-0002-6070-2851"
    },
    {
      "affs": [
        19
      ],
      "name": "Sabine Thater"
    },
    {
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        12
      ],
      "name": "Lucas M Valenzuela",
      "orcid": "0000-0002-7972-9675"
    },
    {
      "affs": [
        3
      ],
      "name": "Jesse van de Sande"
    },
    {
      "affs": [
        19
      ],
      "name": "Glenn van de Ven"
    },
    {
      "affs": [
        20
      ],
      "name": "Daria Zakharova",
      "orcid": "0009-0001-1809-4821"
    },
    {
      "affs": [
        19
      ],
      "name": "Bodo L Ziegler"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d17dsz7yr305y.bib",
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  "doi": "10.1093/mnras/stag2078",
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    "0035-8711",
    "1365-2966"
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  "pmcid": null,
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  "published": "2026-10-31",
  "publisher": "Oxford University Press (OUP)",
  "ris": "https://research.draconitic.com/paper/d17dsz7yr305y.ris",
  "sources": [
    {
      "first_seen": "2026-11-01T00:20:40Z",
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  "subjects": [
    {
      "field": "astronomy",
      "origin": "journal-openalex:3103|Stellar, planetary, and galactic studies",
      "subfield": "stellar"
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  ],
  "title": "The MAGPI Survey: the evolution of galaxy spin–filament alignments since z∼0.3",
  "title_text": "The MAGPI Survey: the evolution of galaxy spin–filament alignments since z∼0.3",
  "type": "peer-reviewed",
  "updated_at": "2026-11-01T00:20:40Z",
  "url": "https://research.draconitic.com/paper/d17dsz7yr305y",
  "venue": "Monthly Notices of the Royal Astronomical Society",
  "versions": []
}