{
  "abstract": "Context . Ethanimine is a prebiotically relevant complex organic molecule that has been proposed as a key precursor of amino acids in the interstellar medium. To date, both its E and Z isomers have only been detected toward the Sgr B2(N) molecular cloud. The pronounced non-local thermodynamic equilibrium (non-LTE) effects predicted for this molecule require accurate collisional rate coefficients for reliable astrophysical modeling and future astronomical searches.\n\nAims . We aim to provide the first collisional datasets for both ethanimine isomers with the main cold molecular clouds collision partners, He and para -H ₂ , in order to support non-LTE radiative-transfer modeling.\n\nMethods . State-to-state rate coefficients for collisions with He were computed by integration over mixed close-coupling (CC) and coupled-states (CS) scattering cross sections at different energy ranges. In addition, comparisons with mixed quantum-classical theory (MQCT) calculations performed for both He and para -H ₂ collisions enabled the derivation of transition-specific scaling factors, which were applied to predict collisional rate coefficients for para -H ₂ .\n\nResults . We present the first state-to-state collisional datasets for both E - and Z -ethanimine in collision with He and para -H ₂ , including all rotational transitions involving levels below 50 cm ⁻¹ and over the 5–100 K temperature range.\n\nConclusions . The datasets reported here provide the first collisional information suitable for non-LTE modeling of ethanimine in cold interstellar environments. They represent a key step toward more reliable abundance determinations and may facilitate future astronomical detections of both ethanimine isomers beyond Sgr B2(N).",
  "abstract_shown": true,
  "affiliations": [
    "Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) – UMR 6251",
    "Chemistry Department, Wehr Chemistry Building, Marquette University",
    "Department of Chemistry, Missouri University of Science and Technology"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Francesca Tonolo",
      "orcid": "0000-0002-9555-7834"
    },
    {
      "affs": [
        1
      ],
      "name": "Vivek Vijay",
      "orcid": "0009-0002-7543-9336"
    },
    {
      "affs": [
        2
      ],
      "name": "Ernesto Quintas-Sánchez",
      "orcid": "0000-0002-4378-8745"
    },
    {
      "affs": [
        2
      ],
      "name": "Adrian Batista Planas",
      "orcid": "0009-0008-4985-8362"
    },
    {
      "affs": [
        1
      ],
      "name": "Carolin Joy",
      "orcid": "0009-0001-0368-1660"
    },
    {
      "affs": [
        2
      ],
      "name": "Richard Dawes",
      "orcid": "0000-0002-2493-4671"
    },
    {
      "affs": [
        0
      ],
      "name": "François Lique",
      "orcid": "0000-0002-0664-2536"
    },
    {
      "affs": [
        1
      ],
      "name": "Dmitri Babikov",
      "orcid": "0000-0002-4667-7645"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/76sy7wwd936e5.bib",
  "cited_by": 0,
  "doi": "10.1051/0004-6361/202662226",
  "fulltext_url": "https://www.aanda.org/articles/aa/full_html/2026/10/aa62226-26/aa62226-26.html",
  "id": "76sy7wwd936e5",
  "issns": [
    "0004-6361",
    "1432-0746"
  ],
  "landing_url": "https://www.aanda.org/10.1051/0004-6361/202662226",
  "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": [
    [
      "lcc",
      "QB1-991"
    ],
    [
      "openalex",
      "3103|Astrophysics and Star Formation Studies"
    ]
  ],
  "openalex": "W7214640957",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-29",
  "publisher": "EDP Sciences",
  "ris": "https://research.draconitic.com/paper/76sy7wwd936e5.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:18Z",
      "native_id": "10.1051/0004-6361/202662226",
      "source": "crossref",
      "url": "https://www.aanda.org/10.1051/0004-6361/202662226"
    },
    {
      "first_seen": "2026-10-31T14:22:50Z",
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      "url": "https://doi.org/10.1051/0004-6361/202662226"
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  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Astrophysics and Star Formation Studies",
      "subfield": "stellar"
    }
  ],
  "title": "Collisional excitation of E - and Z -ethanimine to model cold molecular clouds",
  "title_text": "Collisional excitation of E - and Z -ethanimine to model cold molecular clouds",
  "type": "peer-reviewed",
  "updated_at": "2026-11-01T14:20:49Z",
  "url": "https://research.draconitic.com/paper/76sy7wwd936e5",
  "venue": "Astronomy & Astrophysics",
  "versions": []
}