{
  "abstract": "The next generation of Stage-V spectroscopic surveys are designed to measure hundreds of millions of galaxy and quasar spectra, extending precision large-scale-structure cosmology to redshifts and volumes well beyond the reach of current Stage-IV facilities. Realising this potential requires revisiting the target selection strategies and designing them explicitly around the depth, multiplexing, and survey time of the new instruments, rather than a direct extrapolation of existing recipes. This work develops and characterises new strategies for the Wide-field Spectroscopic Telescope (WST), a proposed 12-metre, highly multiplexed facility expected to operate in the 2040s. Using deep multi-band photometry, including COSMOS-field data from CLAUDS and HSC, we revisit low-redshift $z<1.6$ tracer selection of SDSS, BOSS/eBOSS, DESI and 4MOST-CRS -- Bright Galaxies, Luminous Red Galaxies, Emission Line Galaxies and quasars -- to photometric depth achievable in the WST era, and introduce a purely magnitude-limited sample (MagMax) exploiting three-dimensional colour-colour star-galaxy separation, and a set of Lyman-Break Galaxy dropout samples extending target selection to $z>2$. Using Fisher-matrix forecasts, we showcase the constraining power of a WST-like cosmological survey on BAO distance parameters $α_\\parallel$ and $α_\\perp$, the growth rate $f$, the evolving dark energy equation $w_0w_a$, the local-type primordial non-Gaussianity $f_{\\rm NL}^{\\rm loc}$, and the sum of the neutrino mass $Σm_ν$. The main outcome of this work is an optimisation framework that directly links instrumental capabilities and observing time to cosmological constraining power, providing a science-driven template applicable to the design of future generations of Stage-V spectroscopic surveys.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.02828",
  "author_total": 25,
  "authors": [
    {
      "name": "Constantin Payerne"
    },
    {
      "name": "Antoine Rocher"
    },
    {
      "name": "Aurélien Verdier"
    },
    {
      "name": "William d'Assignies"
    },
    {
      "name": "Behnood Bandi"
    },
    {
      "name": "Sofia Contarini"
    },
    {
      "name": "Matteo Ferro"
    },
    {
      "name": "Jean-Paul Kneib"
    },
    {
      "name": "Vincenzo Mainieri"
    },
    {
      "name": "Michele Moresco"
    },
    {
      "name": "Marco Palla"
    },
    {
      "name": "Maxime Rombach"
    },
    {
      "name": "Christophe Yèche"
    },
    {
      "name": "Furkan Akbaba"
    },
    {
      "name": "Hélène Courtois"
    },
    {
      "name": "Darko Donevski"
    },
    {
      "name": "Massimo Guidi"
    },
    {
      "name": "Valentin Ivanov"
    },
    {
      "name": "Konstantinos Migkas"
    },
    {
      "name": "Ivan Minchev"
    },
    {
      "name": "Ignacio del Moral-Castro"
    },
    {
      "name": "Olcay Plevne"
    },
    {
      "name": "Mojtaba Raouf"
    },
    {
      "name": "Laurence Tresse"
    },
    {
      "name": "the WST Collaboration"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5vs5m96ynbny3.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.02828",
  "fulltext_url": null,
  "id": "5vs5m96ynbny3",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.02828",
  "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.CO"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.02828",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5vs5m96ynbny3.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:59Z",
      "native_id": "2611.02828",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.02828"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    }
  ],
  "title": "Targeting the future of spectroscopic galaxy surveys -- A cosmological study case with the Wide-field Spectroscopic Telescope",
  "title_text": "Targeting the future of spectroscopic galaxy surveys -- A cosmological study case with the Wide-field Spectroscopic Telescope",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:18Z",
  "url": "https://research.draconitic.com/paper/5vs5m96ynbny3",
  "venue": "arXiv",
  "versions": []
}