{
  "abstract": "A subclass of intermediate mass variables δ Scuti stars, known as high-amplitude δ Scuti (HADS) stars, exhibits pronounced radial pulsations. We used ground- and space-based observations to perform an asteroseismic analysis of the HADS star EH Lib. Following the reduction of light curves, the frequency analysis reveals the dominant frequency as f ₀ = 11.3105 d ⁻¹ and two newly detected significant frequencies f ₁ and f ₂ , in addition to the harmonics of f ₀ and a linear combination. The period change rate is determined as (1/ P ₀ )( dP ₀ / dt ) = (5.4 ± 0.5) × 10 ⁻⁹ yr ⁻¹ derived from an O − C diagram, which is constructed from 342 times of maximum light spanning over 70 yr. Using these observational constraints, along with the metallicities reported in the literature, we construct theoretical models using the stellar evolution code MESA and calculate the theoretical frequencies of the eigenmodes using the oscillation code GYRE. The appropriate models are selected by matching f ₀ , (1/ P ₀ )( dP ₀ / dt ), and luminosity within their respective uncertainties. The results indicate that the observed period change of EHLib can be attributed to stellar evolutionary effects. The stellar parameters of EHLib are derived as the mass of 1.555 ± 0.015 M ⊙ , the luminosity of log ( L / L ⊙ ) = 1.26 ± 0.02 , and the age of (1.46 ± 0.05) × 10 ⁹ yr. EH Lib is classified as a single-radial-mode HADS star, located in the subgiant branch, with a helium core and hydrogen-burning shell. This work expands the asteroseismological sample of HADS stars and establishes a foundation for future investigations into their commonalities and specific properties, thereby advancing our understanding of these variables.",
  "abstract_shown": true,
  "affiliations": [
    "Beijing Normal University",
    "Chinese Academy of Sciences",
    "Universidad Nacional Autónoma de México",
    "Taiyuan Normal University",
    "China West Normal University",
    "International Centre of Supernovae",
    "School of Physics, Nankai University, Tianjin 300071,"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 10,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Xiran Xie",
      "orcid": "0009-0000-4210-1270"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Jianning Fu",
      "orcid": "0000-0001-8241-1740"
    },
    {
      "affs": [
        0
      ],
      "name": "Gang Meng"
    },
    {
      "affs": [
        2
      ],
      "name": "Lester Fox Machado",
      "orcid": "0000-0002-2781-873X"
    },
    {
      "affs": [
        2
      ],
      "name": "Raúl Michel",
      "orcid": "0000-0003-1263-808X"
    },
    {
      "affs": [
        3
      ],
      "name": "Huifang Xue",
      "orcid": "0000-0001-6027-4562"
    },
    {
      "affs": [
        4
      ],
      "name": "Nian Liu"
    },
    {
      "affs": [
        0
      ],
      "name": "Zhongyang Liu",
      "orcid": "0009-0005-2920-7261"
    },
    {
      "affs": [
        1,
        5
      ],
      "name": "Jie Su",
      "orcid": "0000-0001-7566-9436"
    },
    {
      "affs": [
        6
      ],
      "name": "Mingfeng Qin",
      "orcid": "0000-0002-0040-8351"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0x2fvq13kfybf.bib",
  "cited_by": 0,
  "doi": "10.3847/1538-4357/aea6c5",
  "fulltext_url": null,
  "id": "0x2fvq13kfybf",
  "issns": [
    "0004-637X",
    "1538-4357"
  ],
  "landing_url": "https://iopscience.iop.org/article/10.3847/1538-4357/aea6c5",
  "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|Stellar, planetary, and galactic studies"
    ]
  ],
  "openalex": "W4417485140",
  "pdf_url": "https://iopscience.iop.org/article/10.3847/1538-4357/aea6c5/pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-21",
  "publisher": "American Astronomical Society",
  "ris": "https://research.draconitic.com/paper/0x2fvq13kfybf.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:11Z",
      "native_id": "10.3847/1538-4357/aea6c5",
      "source": "crossref",
      "url": "https://iopscience.iop.org/article/10.3847/1538-4357/aea6c5"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Stellar, planetary, and galactic studies",
      "subfield": "stellar"
    }
  ],
  "title": "Asteroseismology of the High-amplitude δ Scuti Star EH Librae",
  "title_text": "Asteroseismology of the High-amplitude δ Scuti Star EH Librae",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:11Z",
  "url": "https://research.draconitic.com/paper/0x2fvq13kfybf",
  "venue": "The Astrophysical Journal",
  "versions": []
}