{
  "abstract": "We present a measurement of baryon acoustic oscillations (BAO) in the cross correlation of triply ionized carbon (C iv ) absorption with the positions of quasars (QSO) and emission-line galaxies (ELGs). We use quasars and ELGs from the second data release (DR2) of the Dark Energy Spectroscopic Instrument survey. Our data sample consists of 2.5 million quasars, 3.1 million ELGs, and the C iv absorption is measured along the line of sight of 1.5 million high-redshift quasars with z > 1.3. We measure the isotropic BAO signal at 4.2 σ for the C IV ×QSO cross correlation. This translates into a 3.0% precision measurement of the ratio of the isotropic distance scale, D V , and the sound horizon at the drag epoch, r d , with D V / r d ( z eff = 1.92) = 30.3 ± 0.9. We make the first detection of the BAO feature in the C IV ×ELG cross-correlation at a significance of 2.5 σ and find D V / r d ( z eff = 1.47) = 24.6 ± 1.0.",
  "abstract_shown": true,
  "affiliations": [
    "Lawrence Berkeley National Laboratory",
    "Boston University",
    "Università degli Studi di Milano",
    "INAF–Osservatorio Astronomico di Brera",
    "University College London",
    "University of Portsmouth",
    "Universidad Nacional Autónoma de México",
    "NSF NOIRLab",
    "University of California, Berkeley",
    "Institució Catalana de Recerca i Estudis Avançats",
    "The Barcelona Institute of Science and Technology",
    "Universidad de los Andes",
    "Institut d’Estudis Espacials de Catalunya (IEEC)",
    "Institute of Space Sciences",
    "University of Virginia",
    "Fermi National Accelerator Laboratory",
    "The University of Texas at Austin",
    "Institut d’Astrophysique de Paris,",
    "Université Paris-Saclay",
    "The Ohio State University",
    "The University of Texas at Dallas",
    "University of California",
    "Sorbonne Université",
    "Universitat Autònoma de Barcelona",
    "Siena University",
    "University of Waterloo",
    "Perimeter Institute for Theoretical Physics",
    "Aix Marseille Université",
    "Instituto de Astrofísica de Andalucía (CSIC)",
    "Universitat Politècnica de Catalunya",
    "Sejong University",
    "CIEMAT",
    "Ohio University",
    "University of Michigan"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 56,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Abby Bault",
      "orcid": "0000-0002-9964-1005"
    },
    {
      "affs": [
        0
      ],
      "name": "Andrei Cuceu",
      "orcid": "0000-0002-2169-0595"
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    {
      "affs": [
        0
      ],
      "name": "Julien Guy",
      "orcid": "0000-0001-9822-6793"
    },
    {
      "affs": [
        0
      ],
      "name": "J. Aguilar",
      "orcid": "0000-0003-0822-452X"
    },
    {
      "affs": [
        1
      ],
      "name": "S. Ahlen",
      "orcid": "0000-0001-6098-7247"
    },
    {
      "affs": [
        2,
        3
      ],
      "name": "D. Bianchi",
      "orcid": "0000-0001-9712-0006"
    },
    {
      "affs": [
        0
      ],
      "name": "A. Brodzeller",
      "orcid": "0000-0002-8934-0954"
    },
    {
      "affs": [
        4
      ],
      "name": "D. Brooks",
      "orcid": "0000-0002-8458-5047"
    },
    {
      "affs": [
        5
      ],
      "name": "R. Canning"
    },
    {
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        0
      ],
      "name": "E. Chaussidon",
      "orcid": "0000-0001-8996-4874"
    },
    {
      "affs": [
        0
      ],
      "name": "T. Claybaugh"
    },
    {
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        0
      ],
      "name": "R. de Belsunce",
      "orcid": "0000-0003-3660-4028"
    },
    {
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        6
      ],
      "name": "A. de la Macorra",
      "orcid": "0000-0002-1769-1640"
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    {
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        7
      ],
      "name": "Arjun Dey",
      "orcid": "0000-0002-4928-4003"
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    {
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        4
      ],
      "name": "P. Doel",
      "orcid": "0000-0002-6397-4457"
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      "name": "S. Ferraro",
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        10
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      "name": "A. Font-Ribera",
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      "name": "J. E. Forero-Romero",
      "orcid": "0000-0002-2890-3725"
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        12,
        13
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      "name": "E. Gaztañaga",
      "orcid": "0000-0001-9632-0815"
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        0,
        14
      ],
      "name": "S. Gontcho A Gontcho",
      "orcid": "0000-0003-3142-233X"
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    {
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        4
      ],
      "name": "C. Gordon",
      "orcid": "0000-0003-2561-5733"
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        0
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      "name": "D. Green",
      "orcid": "0000-0002-0676-3661"
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      "name": "G. Gutierrez",
      "orcid": "0000-0003-0825-0517"
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      ],
      "name": "C. Hahn",
      "orcid": "0000-0003-1197-0902"
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        18
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      "name": "H. K. Herrera-Alcantar",
      "orcid": "0000-0002-9136-9609"
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      "name": "K. Honscheid",
      "orcid": "0000-0002-6550-2023"
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        20
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      "name": "M. Ishak",
      "orcid": "0000-0002-6024-466X"
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      "name": "R. Joyce",
      "orcid": "0000-0003-0201-5241"
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      "name": "S. Juneau",
      "orcid": "0000-0002-0000-2394"
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      "name": "D. Kirkby",
      "orcid": "0000-0002-8828-5463"
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    {
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        0
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      "name": "A. Kremin",
      "orcid": "0000-0001-6356-7424"
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    {
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        19
      ],
      "name": "C. Lamman",
      "orcid": "0000-0002-6731-9329"
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    {
      "affs": [
        0
      ],
      "name": "M. Landriau",
      "orcid": "0000-0003-1838-8528"
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    {
      "affs": [
        22
      ],
      "name": "L. Le Guillou",
      "orcid": "0000-0001-7178-8868"
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    {
      "affs": [
        0
      ],
      "name": "M. E. Levi",
      "orcid": "0000-0003-1887-1018"
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    {
      "affs": [
        10,
        23
      ],
      "name": "M. Manera",
      "orcid": "0000-0003-4962-8934"
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    {
      "affs": [
        19
      ],
      "name": "P. Martini",
      "orcid": "0000-0002-4279-4182"
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    {
      "affs": [
        7
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      "name": "A. Meisner",
      "orcid": "0000-0002-1125-7384"
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    {
      "affs": [
        9,
        10
      ],
      "name": "R. Miquel",
      "orcid": "0000-0002-6610-4836"
    },
    {
      "affs": [
        24
      ],
      "name": "J. Moustakas",
      "orcid": "0000-0002-2733-4559"
    },
    {
      "affs": [
        6
      ],
      "name": "A. Muñoz-Gutiérrez",
      "orcid": "0000-0002-3565-0148"
    },
    {
      "affs": [
        5
      ],
      "name": "S. Nadathur",
      "orcid": "0000-0001-9070-3102"
    },
    {
      "affs": [
        0,
        18
      ],
      "name": "N. Palanque-Delabrouille",
      "orcid": "0000-0003-3188-784X"
    },
    {
      "affs": [
        25,
        26
      ],
      "name": "W. J. Percival",
      "orcid": "0000-0002-0644-5727"
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    {
      "affs": [
        27
      ],
      "name": "Matthew M. Pieri",
      "orcid": "0000-0003-0247-8991"
    },
    {
      "affs": [
        0,
        8
      ],
      "name": "C. Poppett",
      "orcid": "0000-0003-0512-5489"
    },
    {
      "affs": [
        28
      ],
      "name": "F. Prada",
      "orcid": "0000-0001-7145-8674"
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    {
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        29
      ],
      "name": "I. Pérez-Ràfols",
      "orcid": "0000-0001-6979-0125"
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    {
      "affs": [
        30
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      "name": "G. Rossi"
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        31
      ],
      "name": "E. Sanchez",
      "orcid": "0000-0002-9646-8198"
    },
    {
      "affs": [
        0
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      "name": "D. Schlegel",
      "orcid": "0000-0002-5042-5088"
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        32
      ],
      "name": "H. Seo",
      "orcid": "0000-0002-6588-3508"
    },
    {
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        0
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      "name": "J. Silber",
      "orcid": "0000-0002-3461-0320"
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      "name": "D. Sprayberry",
      "orcid": "0000-0001-7583-6441"
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        33
      ],
      "name": "G. Tarlé",
      "orcid": "0000-0003-1704-0781"
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      "affs": [
        7
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      "name": "B. A. Weaver"
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  ],
  "bibtex": "https://research.draconitic.com/paper/bs2m3we4fxt97.bib",
  "cited_by": 0,
  "doi": "10.3847/1538-4357/ae9ec1",
  "fulltext_url": null,
  "id": "bs2m3we4fxt97",
  "issns": [
    "0004-637X",
    "1538-4357"
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  "landing_url": "https://iopscience.iop.org/article/10.3847/1538-4357/ae9ec1",
  "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|Cosmology and Gravitation Theories"
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  "openalex": "W7215075597",
  "pdf_url": "https://iopscience.iop.org/article/10.3847/1538-4357/ae9ec1/pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": "American Astronomical Society",
  "ris": "https://research.draconitic.com/paper/bs2m3we4fxt97.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:11Z",
      "native_id": "10.3847/1538-4357/ae9ec1",
      "source": "crossref",
      "url": "https://iopscience.iop.org/article/10.3847/1538-4357/ae9ec1"
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  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Cosmology and Gravitation Theories",
      "subfield": "cosmology"
    }
  ],
  "title": "Baryon Acoustic Oscillations from the C iv Forest with DESI DR2",
  "title_text": "Baryon Acoustic Oscillations from the C iv Forest with DESI DR2",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:11Z",
  "url": "https://research.draconitic.com/paper/bs2m3we4fxt97",
  "venue": "The Astrophysical Journal",
  "versions": []
}