{
  "annotation_id": "0fcd2d40-34f6-4adc-abeb-62126ce52d19",
  "date_created": "2026-02-17T05:53:11.817000Z",
  "date_modified": "2026-02-17T05:53:11.817000Z",
  "file_hash": "547257edf82346f6418478ebd9e4975f08869d5de041f9a21b126568bc394d5d",
  "private": false,
  "record": {
    "abstract": "Recent JWST observations have revealed a population of unexpectedly bright sources at ultra-high redshift ($z \u003e 15$), challenging current models of early galaxy formation. One extreme example is \u0027Capotauro\u0027, an F356W-dropout identified in the CEERS survey and initially interpreted as a luminous galaxy at $z\\sim30$, but subsequently found to be variable over an $\\sim 800$ day baseline. Motivated by this variability, we explore the alternative hypothesis that Capotauro is a pair-instability supernova (PISN) originating from a massive ($250-260\\,M_\\odot$), metal-free star. Using state-of-the-art PISN light curves, spectral energy distributions, and synthetic spectra, we show that a PISN at $z\\simeq 15$ can plausibly reproduce the observed brightness, temporal evolution, photometry, and NIRSpec spectrum. We compare this scenario with alternative interpretations, including a local Y0 brown dwarf, and discuss observational tests to discriminate among them. If confirmed, this event would provide a rare window onto Population III stars, and highlights the importance of transient contamination in ultra-high redshift galaxy samples.",
    "arxiv_id": "2601.07374",
    "authors": [
      "Andrea Ferrara",
      "Stefano Carniani",
      "Takahiro Morishita",
      "Massimo Stiavelli"
    ],
    "categories": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "title": "Possible evidence for a pair-instability supernova nature of ultra-early JWST sources",
    "url": "https://arxiv.org/abs/2601.07374",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "826a451e-9610-4fdc-afcd-874d0cfb970f",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}