{
  "abstract": "Shock breakout is the first electromagnetic signal of a supernova, generating a highly luminous and fast-timescale burst of thermal radiation. Motivated by recent theoretical progress in producing successful three-dimensional supernova explosions of massive stars, we undertake a detailed numerical study on the impact that the core-collapse asymmetries might have on the breakout signal. We perform the first fully 3D multi-group radiation hydrodynamics simulations of shock breakout for the case of a red supergiant explosion. We find that large-scale asymmetries formed during the core-collapse process can extend the breakout flash duration to days, with the timescale set by the supernova shock fully wrapping around the progenitor star. Using detailed 3D radiative transfer post-processing, we generate synthetic multi-wavelength light curves and spectra to more closely connect to observations. The light curves show a significant viewing-angle dependence of the overall shape and peak brightness of shock breakout. We find that core-collapse asymmetries have the largest impact on the breakout light curve when observed in shorter UV wavelengths. On the other hand, at optical wavelengths, we find a diminished impact of the asymmetric breakout that more closely resembles a 1D spherical breakout. Our results show how multi-dimensional effects originating from the core-collapse mechanism can play a major role in setting the shock breakout properties, and are particularly relevant to upcoming UV space missions such as ULTRASAT and UVEX.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.27183",
  "author_total": 5,
  "authors": [
    {
      "name": "David K. Khatami"
    },
    {
      "name": "David Vartanyan"
    },
    {
      "name": "Hai P. Le"
    },
    {
      "name": "Daniel N. Kasen"
    },
    {
      "name": "Adam Burrows"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6pdktrr87zm30.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.27183",
  "fulltext_url": null,
  "id": "6pdktrr87zm30",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.27183",
  "language": null,
  "licence": "CC-BY-NC-SA-4.0",
  "licence_label": "CC BY-NC-SA 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-sa/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": "W7223145439",
  "pdf_url": "https://arxiv.org/pdf/2610.27183",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-19",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6pdktrr87zm30.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:04Z",
      "native_id": "2610.27183",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.27183"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "The Imprint of Core-collapse Asymmetries on Supernova Shock Breakout",
  "title_text": "The Imprint of Core-collapse Asymmetries on Supernova Shock Breakout",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:04Z",
  "url": "https://research.draconitic.com/paper/6pdktrr87zm30",
  "venue": "arXiv",
  "versions": []
}