{
  "abstract": "Small exoplanet radii show two populations, referred to as super-Earths and sub-Neptunes, separated by a gap known as the radius valley. This may be produced by the removal of atmospheres due to stellar or internal heating, or lack of an initial envelope. We use transit photometry and radial velocity measurements to detect and characterize four planets orbiting LHS 1903, a red dwarf (M-dwarf) star in the Milky Way's thick disk. The planets have orbital periods between 2.2 and 29.3 days, and span the radius valley within a single planetary system. The derived densities indicate that LHS 1903 b is rocky, while LHS 1903 c and LHS 1903 d have extended atmospheres. Although the most distant planet from",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2602.11271",
  "author_total": 176,
  "authors": [
    {
      "name": "Thomas Wilson"
    },
    {
      "name": "Anna Simpson"
    },
    {
      "name": "Andrew Collier Cameron"
    },
    {
      "name": "Ryan Cloutier"
    },
    {
      "name": "Vardan Adibekyan"
    },
    {
      "name": "Ancy Anna John"
    },
    {
      "name": "Yann Alibert"
    },
    {
      "name": "Manu Stalport"
    },
    {
      "name": "Jo Ann Egger"
    },
    {
      "name": "Andrea Bonfanti"
    },
    {
      "name": "Nicolas Billot"
    },
    {
      "name": "Pascal Guterman"
    },
    {
      "name": "Pierre Maxted"
    },
    {
      "name": "Attila Simon"
    },
    {
      "name": "Sérgio Sousa"
    },
    {
      "name": "Malcolm Fridlund"
    },
    {
      "name": "Mathias Beck"
    },
    {
      "name": "Anja Bekkelien"
    },
    {
      "name": "Sébastien Salmon"
    },
    {
      "name": "Valérie van Grootel"
    },
    {
      "name": "Luca Fossati"
    },
    {
      "name": "Alexander James Mustill"
    },
    {
      "name": "Hugh Osborn"
    },
    {
      "name": "Tiziano Zingales"
    },
    {
      "name": "Matthew Hooton"
    },
    {
      "name": "Laura Affer"
    },
    {
      "name": "Suzanne Aigrain"
    },
    {
      "name": "Roi Alonso"
    },
    {
      "name": "Guillem Anglada"
    },
    {
      "name": "Alexandros Antoniadis-Karnavas"
    },
    {
      "name": "Tamas Bárczy"
    },
    {
      "name": "David Barrado Navascues"
    },
    {
      "name": "Susana Barros"
    },
    {
      "name": "Wolfgang Baumjohann"
    },
    {
      "name": "Thomas Beck"
    },
    {
      "name": "Willy Benz"
    },
    {
      "name": "Federico Biondi"
    },
    {
      "name": "Xavier Bonfils"
    },
    {
      "name": "Luca Borsato"
    },
    {
      "name": "Alexis Brandeker"
    },
    {
      "name": "Christopher Broeg"
    },
    {
      "name": "Lars Buchhave"
    },
    {
      "name": "Maximilian Buder"
    },
    {
      "name": "Juan Cabrera"
    },
    {
      "name": "Sebastian Carrazco Gaxiola"
    },
    {
      "name": "David Charbonneau"
    },
    {
      "name": "Sébastien Charnoz"
    },
    {
      "name": "David Ciardi"
    },
    {
      "name": "Karen Collins"
    },
    {
      "name": "Kevin Collins"
    },
    {
      "name": "Rosario Cosentino"
    },
    {
      "name": "Szilard Csizmadia"
    },
    {
      "name": "Patricio Cubillos"
    },
    {
      "name": "Shweta Dalal"
    },
    {
      "name": "Mario Damasso"
    },
    {
      "name": "James Davenport"
    },
    {
      "name": "Melvyn Davies"
    },
    {
      "name": "Magali Deleuil"
    },
    {
      "name": "Laetitia Delrez"
    },
    {
      "name": "Olivier Demangeon"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5my1ckqth4cpn.bib",
  "cited_by": 1,
  "doi": "10.1126/science.adl2348",
  "fulltext_url": null,
  "id": "5my1ckqth4cpn",
  "issns": [],
  "landing_url": "https://hal.science/hal-05843511v1",
  "language": "en",
  "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": [
    [
      "hal",
      "0.sdu"
    ],
    [
      "hal",
      "1.sdu.astr"
    ],
    [
      "hal",
      "2.sdu.astr.ep"
    ],
    [
      "openalex",
      "3103|Stellar, planetary, and galactic studies"
    ]
  ],
  "openalex": "W7128686702",
  "pdf_url": "https://hal.science/hal-05843511/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5my1ckqth4cpn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:03Z",
      "native_id": "hal-05843511",
      "source": "hal",
      "url": "https://hal.science/hal-05843511v1"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "hal:2.sdu.astr.ep",
      "subfield": "planetary"
    },
    {
      "field": "earth",
      "origin": "hal:0.sdu",
      "subfield": "general"
    }
  ],
  "title": "Gas-depleted planet formation occurred in the four-planet system around the red dwarf LHS 1903",
  "title_text": "Gas-depleted planet formation occurred in the four-planet system around the red dwarf LHS 1903",
  "type": "preprint",
  "updated_at": "2026-10-31T12:20:56Z",
  "url": "https://research.draconitic.com/paper/5my1ckqth4cpn",
  "venue": "HAL",
  "versions": []
}