{
  "abstract": "Subgiant stars represent a critical phase in stellar evolution, offering an opportunity to investigate how planetary systems respond to the early stages of post-main-sequence expansion. Despite their importance, systematic occurrence-rate studies of this population remain sparse compared with those of main-sequence and red-giant hosts. In this paper, we present a uniform analysis of planet occurrence around a sample of 282,904 subgiant stars selected from the \\textit{Gaia} Data Release 3 (DR3) catalogue. We performed an independent re-analysis of Transiting Exoplanet Survey Satellite (TESS) light curves for transit-signal detection and refinement, followed by multi-stage vetting including a visual inspection and statistical false-positive assessment. We quantified the detection sensitivity of the survey through injection-and-recovery experiments, with 565,808 synthetic transit signals injected across the stellar sample. Over the period range of 1--10 days and the planet-radius range for which the detection completeness is well characterised, we measure a completeness-corrected planet occurrence rate of $0.644^{+0.048}_{-0.041}\\%$. The occurrence rate is strongly dependent on planet radius, with the highest occurrence contributed by planets in the $1$--$4\\,R_{\\oplus}$ range and a secondary enhancement at $12$--$15\\,R_{\\oplus}$. These results provide a demographic baseline for studying the population of close-in planets around stars undergoing early post-main-sequence evolution.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.37517",
  "author_total": 2,
  "authors": [
    {
      "name": "Arkaprova Dutta"
    },
    {
      "name": "Priyanka Chaturvedi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3nvrf0wv4m4dq.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.37517",
  "fulltext_url": null,
  "id": "3nvrf0wv4m4dq",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.37517",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.EP"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.37517",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3nvrf0wv4m4dq.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:50Z",
      "native_id": "2609.37517",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.37517"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.EP",
      "subfield": "planetary"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "The Occurrence Rate of Planets Around Subgiant Stars from TESS Photometric Survey",
  "title_text": "The Occurrence Rate of Planets Around Subgiant Stars from TESS Photometric Survey",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:50Z",
  "url": "https://research.draconitic.com/paper/3nvrf0wv4m4dq",
  "venue": "arXiv",
  "versions": []
}