{
  "abstract": "We present late-time photometry (~100-400 days after peak) and nebular-phase optical/NIR spectroscopy (100-360 days) of the Type Ia supernova (SN Ia) SN 2023bee. This SN Ia was observed TESS immediately before and after explosion and showed a relatively weak early excess light-curve feature detected in multiple UV and optical bands. Possible explanations for this early excess feature include interaction between the SN ejecta and a non-degenerate companion, or the decay of radioactive isotopes synthesized near the ejecta surface in a sub-$\\text{M}_\\text{Ch}$ double-detonation scenario. However, the degeneracies and incompleteness of existing models have so far prevented a definitive conclusion about its progenitor system. Nebular-phase spectra provide a complementary probe of SN Ia progenitors by constraining stripped H/He-rich material and iron-group abundances sensitive to the progenitor white dwarf density. We report the non-detection of narrow H/He features in nebular phase optical/NIR spectra of SN 2023bee, placing upper limits of $m^{\\text{stripped}}_\\text{H}\\lesssim5.0\\times10^{-3}\\text{ M}_\\odot$ and $m_\\text{He}^{\\text{stripped}}\\lesssim1.2\\times10^{-4}\\text{ M}_\\odot$. These limits strongly disfavor a non-degenerate companion and suggest that companion interaction is unlikely to explain the early excess of SN 2023bee. We also performed line-diagnostic measurements on the 7200 Åcomplex using multi-Gaussian fitting and continuum estimation, with the inferred velocities validated against NIR spectrum at the similar phase. The resulting low Ni-to-Fe mass ratio, $m_\\text{Ni}/m_\\text{Fe}\\lesssim 0.06$, is broadly consistent with a sub-$M_{\\text{Ch}}$ double-detonation progenitor system.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.25674",
  "author_total": 26,
  "authors": [
    {
      "name": "Sophie von Coelln"
    },
    {
      "name": "Qinan Wang"
    },
    {
      "name": "Matthew R. Siebert"
    },
    {
      "name": "Ping Chen"
    },
    {
      "name": "Armin Rest"
    },
    {
      "name": "Luc Dessart"
    },
    {
      "name": "Yossef Zenati"
    },
    {
      "name": "Georgios Dimitriadis"
    },
    {
      "name": "Katie Auchettl"
    },
    {
      "name": "Siyuan Chen"
    },
    {
      "name": "Kyle W. Davis"
    },
    {
      "name": "Thomas de Boer"
    },
    {
      "name": "Ryan J. Foley"
    },
    {
      "name": "Avishay Gal-Yam"
    },
    {
      "name": "Willem B. Hoogendam"
    },
    {
      "name": "Mark E. Huber"
    },
    {
      "name": "Luca Izzo"
    },
    {
      "name": "Charles D. Kilpatrick"
    },
    {
      "name": "Chien-Cheng Lin"
    },
    {
      "name": "Chang Liu"
    },
    {
      "name": "Thomas Bernard Lowe"
    },
    {
      "name": "Gautham Narayan"
    },
    {
      "name": "César Rojas-Bravo"
    },
    {
      "name": "Aidan Sedgewick"
    },
    {
      "name": "Koji Shukawa"
    },
    {
      "name": "Richard J. Wainscoat"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3xjqxe9r6084t.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.25674",
  "fulltext_url": null,
  "id": "3xjqxe9r6084t",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.25674",
  "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.HE"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ],
    [
      "openalex",
      "3103|Gamma-ray bursts and supernovae"
    ]
  ],
  "openalex": "W7222998958",
  "pdf_url": "https://arxiv.org/pdf/2610.25674",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-19",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3xjqxe9r6084t.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:52Z",
      "native_id": "2610.25674",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.25674"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Constraints on the Progenitor of SN 2023bee from its Nebular-Phase Spectra",
  "title_text": "Constraints on the Progenitor of SN 2023bee from its Nebular-Phase Spectra",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:41Z",
  "url": "https://research.draconitic.com/paper/3xjqxe9r6084t",
  "venue": "arXiv",
  "versions": []
}