{
  "abstract": "We present the first detailed forecasts for the detectability of patchy hydrogen reionization in the one-dimensional Lyα forest power spectrum to be measured by the WEAVE-QSO survey. Using the Sherwood-relics reionization simulations and a WEAVE-QSO survey configuration, we generate mock spectra in four redshift bins, z = 4.0, 4.2, 4.4, and 4.6, in which relic ionization and temperature fluctuations from patchy hydrogen reionization enhance the Lyα forest power spectrum on large scales (i.e., at wavenumber $k\\sim 10^{-3}\\rm \\, s\\, km^{-1}$). Our Lyα forest pipeline forecasts the power spectrum covariance by considering sample size, spectral resolution, noise subtraction, continuum placement, metal contamination, and damping wings from high-column density absorbers. Applying our covariance forecast within a Bayesian parameter inference framework, we find that the signature of patchy hydrogen reionization should be detectable at a significance of ≃ 4.5σ. The forthcoming WEAVE-QSO 1D power spectrum measurements should therefore be able to directly detect and characterize the large-scale relic imprint of patchy hydrogen reionization in the Lyα forest power spectrum at z ≥ 4.",
  "abstract_shown": true,
  "affiliations": [
    "School of Physics and Astronomy, The University of Nottingham, University Park , Nottingham, NG7 2RD ,",
    "Astronomy and Mathematics Centre for Astrophysics Research, Department of Physics, , University of Hertfordshire, College Lane, Hatfield, AL10 9AB ,",
    "Astrophysics and Space Engineering, Indian Institute of Technology Indore Department of Astronomy, , Simrol, MP 453552 ,",
    "Aix Marseille Université , CNRS, CNES, Laboratoire d’Astrophysique de Marseille , Marseille 13388 ,",
    "Università degli Studi di Milano-Bicocca Dipartimento di Fisica “G. Occhialini”, , Piazza della Scienza 3, 20126 Milano ,",
    "Camosun College , 3100 Foul Bay Rd, Victoria, BC V8P 5J2 ,",
    "IUCAA , Postbag 4, Ganeshkhind, Pune 411007, Maharashtra ,",
    "INAF - Osservatorio Astronomico di Brera , Via Brera 28, 20122 Milano, via E. Bianchi 46, 23807 Merate ,",
    "INAF - Osservatorio Astronomico di Trieste , via G.B. Tiepolo 11, I-34143 Trieste ,",
    "Isaac Newton Group of Telescopes , Apartado 321, 38700 Santa Cruz de la Palma, Tenerife ,",
    "Universitat Politécnica de Catalunya Departament de Física, EEBE, , c/Eduard Maristany 10, 08930 Barcelona ,",
    "National Centre for Nuclear Research , ul. Pasteura 7, 02-093 Warsaw ,"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 12,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Ke Ma"
    },
    {
      "affs": [
        0
      ],
      "name": "James S Bolton",
      "orcid": "0000-0003-2764-8248"
    },
    {
      "affs": [
        1
      ],
      "name": "Vid Iršič"
    },
    {
      "affs": [
        2
      ],
      "name": "Prakash Gaikwad",
      "orcid": "0000-0002-2423-7905"
    },
    {
      "affs": [
        3
      ],
      "name": "Matthew M Pieri",
      "orcid": "0000-0003-0247-8991"
    },
    {
      "affs": [
        4,
        5
      ],
      "name": "Trystyn A M Berg"
    },
    {
      "affs": [
        6
      ],
      "name": "Rajeshwari Dutta"
    },
    {
      "affs": [
        4,
        7
      ],
      "name": "Matteo Fossati",
      "orcid": "0000-0002-9043-8764"
    },
    {
      "affs": [
        4,
        8
      ],
      "name": "Michele Fumagalli",
      "orcid": "0000-0001-6676-3842"
    },
    {
      "affs": [
        9
      ],
      "name": "Emanuel Gafton",
      "orcid": "0000-0003-0781-6638"
    },
    {
      "affs": [
        10
      ],
      "name": "Ignasi Pérez Ràfols"
    },
    {
      "affs": [
        11,
        7
      ],
      "name": "Francesco Pistis",
      "orcid": "0000-0003-1189-2617"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5gkjx327jkfqq.bib",
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  "doi": "10.1093/mnras/stag2028",
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  "id": "5gkjx327jkfqq",
  "issns": [
    "0035-8711",
    "1365-2966"
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  "pmcid": null,
  "pmid": null,
  "published": "2026-10-29",
  "publisher": "Oxford University Press (OUP)",
  "ris": "https://research.draconitic.com/paper/5gkjx327jkfqq.ris",
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      "origin": "journal-openalex:3103|Stellar, planetary, and galactic studies",
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  ],
  "title": "Forecast for the detectability of patchy hydrogen reionization in WEAVE-QSO measurements of the Lyman-α forest power spectrum at redshift z ≥ 4",
  "title_text": "Forecast for the detectability of patchy hydrogen reionization in WEAVE-QSO measurements of the Lyman-α forest power spectrum at redshift z ≥ 4",
  "type": "peer-reviewed",
  "updated_at": "2026-10-31T00:20:43Z",
  "url": "https://research.draconitic.com/paper/5gkjx327jkfqq",
  "venue": "Monthly Notices of the Royal Astronomical Society",
  "versions": [
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      "doi": "10.48550/arxiv.2608.13153",
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      "relation": "preprint",
      "title": "Forecast for the detectability of patchy hydrogen reionization in WEAVE-QSO measurements of the Lyman-$α$ forest power spectrum at redshift $z \\geq 4$",
      "venue": "HAL"
    }
  ]
}