{
  "abstract": "Extreme debris disks are signposts of violent rocky collisions, but it remains unclear whether their mid-infrared variability traces transient dust clouds or longer-lived postimpact reservoirs. We analyze a 19 yr mid-infrared record of the young solar analog NGC 2547 ID8, combining four spectra from 2007 to 2024 with 3–5 μ m monitoring through 2026. The optically thin mineral surface remains compositionally stable: broad fits spanning multiple grain sizes give 550–577 K, and a common-basis decomposition with T surf fixed at 560 K is dominated by 1 μ m olivine/Mg-olivine and 0.1 μ m forsterite. The W2-equivalent 4.5 μ m excess, traced across six recurrent high states, is instead driven mainly by changes in the hot-base continuum component and defines a 956.8 days infrared recurrence timescale with cycle-to-cycle variations in timing and amplitude. This combination supports the interpretation of ID8 as an early postimpact stage in which material on eccentric orbits repeatedly interacts with a warm rocky reservoir, preserving the impact’s mineral fingerprint while the interaction geometry evolves. Material on eccentric orbits can persist for decades, and possibly longer, while interacting with debris disks. Longer-baseline, higher-cadence infrared monitoring of ID8 will further constrain the stability of its recurrence timescale and the detailed evolution of its infrared variability.",
  "abstract_shown": true,
  "affiliations": [
    "Chinese Academy of Sciences",
    "Beijing Normal University",
    "University of Chinese Academy of Sciences",
    "Beihang University"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0,
        1,
        2
      ],
      "name": "Xiaodian Chen",
      "orcid": "0000-0001-7084-0484"
    },
    {
      "affs": [
        0,
        2
      ],
      "name": "Shu Wang",
      "orcid": "0000-0003-4489-9794"
    },
    {
      "affs": [
        0,
        3
      ],
      "name": "Zhuochao Huang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5agb612yzrwkm.bib",
  "cited_by": 0,
  "doi": "10.3847/2041-8213/aeb1cf",
  "fulltext_url": null,
  "id": "5agb612yzrwkm",
  "issns": [
    "2041-8213",
    "2041-8205"
  ],
  "landing_url": "https://iopscience.iop.org/article/10.3847/2041-8213/aeb1cf",
  "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": [
    [
      "feed-journal",
      "astronomy/general"
    ]
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  "pdf_url": "https://iopscience.iop.org/article/10.3847/2041-8213/aeb1cf/pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-29",
  "publisher": "American Astronomical Society",
  "ris": "https://research.draconitic.com/paper/5agb612yzrwkm.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:17Z",
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    {
      "first_seen": "2026-10-30T12:18:13Z",
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      "url": "https://iopscience.iop.org/article/10.3847/2041-8213/aeb1cf"
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  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "journal-openalex:3103|Stellar, planetary, and galactic studies",
      "subfield": "stellar"
    }
  ],
  "title": "A Recurrent Infrared Modulation in the Warm Postimpact Debris Disk NGC 2547 ID8",
  "title_text": "A Recurrent Infrared Modulation in the Warm Postimpact Debris Disk NGC 2547 ID8",
  "type": "peer-reviewed",
  "updated_at": "2026-10-31T00:20:43Z",
  "url": "https://research.draconitic.com/paper/5agb612yzrwkm",
  "venue": "The Astrophysical Journal Letters",
  "versions": []
}