{
  "abstract": "We present a novel framework for improving dark siren cosmology by applying a Gaussian process (GP) to the line-of-sight (LOS) reconstruction of incomplete galaxy catalogs. In the standard galaxy catalog method for inferring the Hubble constant $H_0$ from gravitational-wave (GW) dark sirens, missing galaxies are typically assumed to follow a uniform distribution in comoving volume, an assumption that discards galaxy redshift clustering information crucial for cosmological inference. We propose instead to model the LOS galaxy redshift distribution as a non-parametric function drawn from a GP realization, which is fitted to the observed incomplete catalog via a hierarchical Bayesian likelihood that explicitly accounts for the survey selection function. Applied to mock GW and galaxy catalogs extending up to redshift $z\\leq0.4$, our method yields $H_0$ constraints that are on average 23% more precise than the standard homogeneous completion when using a 24%-complete galaxy catalog, and 37% more precise for an 8%-complete catalog. The largest improvement, reaching 66%, is obtained in configurations where the GP most effectively reconstructs the redshift over- and under-density features that the homogeneous completion fails to capture.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. D 114, 083523 - Published 13 October, 2026",
  "arxiv": "2608.24992",
  "author_total": 4,
  "authors": [
    {
      "name": "Matteo Tagliazucchi"
    },
    {
      "name": "Jonathan Gair"
    },
    {
      "name": "Riccardo Barbieri"
    },
    {
      "name": "Michele Moresco"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dat349s9a38na.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.24992",
  "fulltext_url": null,
  "id": "dat349s9a38na",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.24992",
  "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"
    ],
    [
      "arxiv",
      "gr-qc"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2608.24992",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dat349s9a38na.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:11Z",
      "native_id": "2608.24992",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.24992"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Enhancing dark siren cosmology via Gaussian process reconstruction of incomplete galaxy catalogs",
  "title_text": "Enhancing dark siren cosmology via Gaussian process reconstruction of incomplete galaxy catalogs",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:11Z",
  "url": "https://research.draconitic.com/paper/dat349s9a38na",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/vmzf-1wxq",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}