{
  "abstract": "Recent surveys have detected excess flux in the Lyman-$α$ forest of quasar spectra several Mpc from high-redshift line-emitting galaxies, indicating a correlation between intergalactic medium (IGM) transmission and reionisation-era galaxies. We examine the galaxy-IGM connection using the Sherwood-Relics simulation suite, a set of hybrid radiation-hydrodynamic simulations that model the IGM at high redshift. We simulate the Lyman-$α$ forest and a population of mock [OIII] emitters using the survey specifications of JWST's ASPIRE programme. We measure the evolution of the effective optical depth in regions close to galaxies, and contrast this with a control sample probing the random IGM. We characterise the changing physical properties of the IGM to explain the observed sightline-to-sightline scatter in opacity between 5.4 < $z$ < 6.2. We find that the IGM is more opaque than average at small radii ($r$ $\\leq$ 5 cMpc/$h$) close to galaxies, as these regions are overdense. At larger radii (15 < $r$ $\\leq$ 50 cMpc/$h$), the IGM is more ionised than average, due to the higher photoionisation rate near galaxies. We find qualitative agreement with the observational results from ASPIRE, though we see large realisation-to-realisation scatter driven by cosmic variance, as also seen in theoretical explorations of the galaxy-Ly$α$ transmission cross-correlation function. Our results generally agree with observations claiming that there is a large-scale ionisation bias around [OIII] emitters, supporting the idea that their role is significant in shaping the properties of the IGM during reionisation.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.26483",
  "author_total": 6,
  "authors": [
    {
      "name": "Hamish Anderson"
    },
    {
      "name": "Laura C. Keating"
    },
    {
      "name": "Luke Conaboy"
    },
    {
      "name": "Xiangyu Jin"
    },
    {
      "name": "James S. Bolton"
    },
    {
      "name": "Ewald Puchwein"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/62vh0fd4szwan.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.26483",
  "fulltext_url": null,
  "id": "62vh0fd4szwan",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.26483",
  "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",
      "astro-ph.GA"
    ],
    [
      "openalex",
      "3103|Galaxies: Formation, Evolution, Phenomena"
    ]
  ],
  "openalex": "W7214120788",
  "pdf_url": "https://arxiv.org/pdf/2609.26483",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/62vh0fd4szwan.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:39Z",
      "native_id": "2609.26483",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.26483"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "Exploring the influence of reionisation-era galaxies on their local intergalactic medium using the Sherwood-Relics simulations",
  "title_text": "Exploring the influence of reionisation-era galaxies on their local intergalactic medium using the Sherwood-Relics simulations",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:39Z",
  "url": "https://research.draconitic.com/paper/62vh0fd4szwan",
  "venue": "arXiv",
  "versions": []
}