{
  "abstract": "Recent observations have revealed intriguing offsets between the UV and FIR emission in high redshift galaxies. In this study, we use the First Light And Reionisation Epoch Simulations (Flares) to compute the spatial offset of ultraviolet (UV) and far-infrared (FIR) centres for a statistical sample (6890) of massive (M⋆ ≳ 109 M⊙) high redshift galaxies (z ∈ [5, 10]). The galaxies are post-processed with the skirt radiative transfer code, to obtain the full spectral energy distribution and surface brightness profile. We simulate James Webb Space Telescope (JWST) Near Infrared Camera (NIRCam; rest-frame 1500 Å, ≈0.031″ resolution) and ALMA rest-frame 158 μm (≈ 0.3″ angular resolution) observations of the galaxies and then calculate the distance between the UV-FIR centres to analyse which physical processes drive the observed UV - FIR spatial offset. We find that ~16.23% of galaxies exhibit spatial offsets of ≥2.5 kpc between their UV and FIR emission peaks. We establish that the spatial offsets do not correlate with stellar mass, UV/FIR luminosity, and size. Offsets also do not correlate with AGN feedback or with large-scale environment or merger history. Galaxies with significant offsets preferentially have bluer UV slopes (−2.5 < β < −1.5), consistent with recent star formation and dust-attenuated cores displacing the observed UV centroid. They show an accelerated star formation history, forming half their z = 5 stellar mass ~0.1 Gyr earlier than galaxies without offsets. These galaxies are enriched earlier than galaxies without an offset and show enhanced stellar metallicities, indicating a transition to an outward growth at higher redshifts (z ≥ 6).",
  "abstract_shown": true,
  "affiliations": [
    "Astronomy and Mathematics, University of Hertfordshire Centre for Astrophysics Research, Department of Physics, , College Lane, Hatfield AL10 9AB ,",
    "Astronomy Centre, University of Sussex , Falmer, Brighton BN1 9QH ,",
    "DTU Space, Technical University of Denmark , Elektrovej 327,DK-2800 Kongens Lyngby ,",
    "Cosmic Dawn centre (DAWN)",
    "Institute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building , No.1, Sec. 4, Roosevelt Rd, Taipei 106319, Taiwan ,",
    "Kavli Institute for Cosmology, University of Cambridge , Madingley Road, Cambridge CB3 0HA ,",
    "Institute of Astronomy, University of Cambridge , Madingley Road, Cambridge CB3 0HA ,",
    "Key Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences , Beijing 100101 ,"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 11,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Paurush Punyasheel",
      "orcid": "0009-0006-0037-1014"
    },
    {
      "affs": [
        1
      ],
      "name": "Aswin P Vijayan"
    },
    {
      "affs": [
        1
      ],
      "name": "William J Roper",
      "orcid": "0000-0002-3257-8806"
    },
    {
      "affs": [
        2,
        3
      ],
      "name": "Thomas R Greve"
    },
    {
      "affs": [
        4
      ],
      "name": "Hiddo Algera",
      "orcid": "0000-0002-4205-9567"
    },
    {
      "affs": [
        5,
        6
      ],
      "name": "Christopher C Lovell",
      "orcid": "0000-0001-7964-5933"
    },
    {
      "affs": [
        2,
        3
      ],
      "name": "Steven Gillman",
      "orcid": "0000-0001-9885-4589"
    },
    {
      "affs": [
        2,
        3
      ],
      "name": "Bitten Gullberg"
    },
    {
      "affs": [
        7
      ],
      "name": "Shihong Liao",
      "orcid": "0000-0001-7075-6098"
    },
    {
      "affs": [
        0
      ],
      "name": "Robert M Yates",
      "orcid": "0000-0001-9320-4958"
    },
    {
      "affs": [
        1
      ],
      "name": "Stephen M Wilkins",
      "orcid": "0000-0003-3903-6935"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8rgd70ef908xr.bib",
  "cited_by": 0,
  "doi": "10.1093/mnras/stag1953",
  "fulltext_url": null,
  "id": "8rgd70ef908xr",
  "issns": [
    "0035-8711",
    "1365-2966"
  ],
  "landing_url": "https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stag1953/8916625",
  "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": "W7162573448",
  "pdf_url": "https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stag1953/71948414/stag1953.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-14",
  "publisher": "Oxford University Press (OUP)",
  "ris": "https://research.draconitic.com/paper/8rgd70ef908xr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:17Z",
      "native_id": "10.1093/mnras/stag1953",
      "source": "crossref",
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  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Galaxies: Formation, Evolution, Phenomena",
      "subfield": "galaxies"
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  ],
  "title": "First Light and Reionization Epoch Simulations (FLARES) XXII: UV-dust spatial offsets at the Epoch of Reionisation",
  "title_text": "First Light and Reionization Epoch Simulations (FLARES) XXII: UV-dust spatial offsets at the Epoch of Reionisation",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:17Z",
  "url": "https://research.draconitic.com/paper/8rgd70ef908xr",
  "venue": "Monthly Notices of the Royal Astronomical Society",
  "versions": [
    {
      "doi": "10.48550/arxiv.2605.27370",
      "pid": "7e28efk39j6yc",
      "relation": "preprint",
      "title": "First Light and Reionization Epoch Simulations (FLARES) XXII: UV-dust spatial offsets at the Epoch of Reionisation",
      "venue": "arXiv"
    }
  ]
}