{
  "abstract": "The frequency of the pressure (p) mode in δ Scuti stars can exceed the Nyquist limit of Kepler long-cadence photometry. These “superNyquist frequencies” (SNFs) are observed as “reflected” peaks at lower frequencies, i.e., they are Nyquist aliases that pose a threat to asteroseismic diagnostics. Their impact on δ Scuti p modes has yet to be comprehensively explored. We performed a systematic survey to search for SNFs in 1838 Kepler δ Scuti stars through a novel technique based on a sliding Lomb-Scargle periodogram, identifying 15 265 confirmed SNFs in 1309 stars, from a total of 259 883 frequencies. We observe that the total number of detected frequencies per star remains featureless across the δ Scuti instability strip; however, young stars pulsate in higher frequencies and so have significantly more SNFs on average. Both the number and the rate of SNFs diminish accordingly as δ Scuti stars become more evolved, which is consistent with both observation and stellar models. Furthermore, our method detects a greater fraction of modes as SNFs at higher frequencies, rising from approximately 1% at 20 μHz to 23% at the Nyquist limit. The rate of underdetection is highest amongst low-amplitude modes. The SNF modulation patterns can be well distinguished from phase modulations induced by binarity or nonlinear mode interactions. We provide a frequency catalog for future asteroseismic studies of δ Scuti stars, wherein we identify each peak as being real or an alias, enabling further investigations into regular patterns of pulsation modes, linear combination frequencies, and theoretical modeling.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "name": "Yanqi Mo"
    },
    {
      "name": "Weikai Zong"
    },
    {
      "name": "Xuan Wang"
    },
    {
      "name": "Simon Murphy"
    },
    {
      "name": "Zilu Yang"
    },
    {
      "name": "Jian-Ning Fu"
    },
    {
      "name": "Stéphane Charpinet"
    },
    {
      "name": "Xiao-Yu Ma"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fvm3te2vhjf12.bib",
  "cited_by": 1,
  "doi": "10.1051/0004-6361/202660002",
  "fulltext_url": null,
  "id": "fvm3te2vhjf12",
  "issns": [
    "0004-6361",
    "1432-0746"
  ],
  "landing_url": "https://hal.science/hal-05801742v1",
  "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.phys"
    ],
    [
      "hal",
      "1.phys.astr"
    ],
    [
      "hal",
      "2.phys.astr.sr"
    ],
    [
      "openalex",
      "3103|Stellar, planetary, and galactic studies"
    ]
  ],
  "openalex": "W7161236786",
  "pdf_url": "https://hal.science/hal-05801742/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-06-17",
  "publisher": "EDP Sciences",
  "ris": "https://research.draconitic.com/paper/fvm3te2vhjf12.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:57Z",
      "native_id": "hal-05801742",
      "source": "hal",
      "url": "https://hal.science/hal-05801742v1"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "hal:2.phys.astr.sr",
      "subfield": "stellar"
    },
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "Identification and characterization of 15 265 super-Nyquist frequencies in 1309 δ Scuti stars from Kepler photometry",
  "title_text": "Identification and characterization of 15 265 super-Nyquist frequencies in 1309 δ Scuti stars from Kepler photometry",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:57Z",
  "url": "https://research.draconitic.com/paper/fvm3te2vhjf12",
  "venue": "Astronomy & Astrophysics - A&A",
  "versions": []
}