Contribution seq 25933

Payload

{
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      "op": "CREATE_SOURCE",
      "ref": "jwst_spurs_primary",
      "title": "Early metal-enriched baryon cycling before the midpoint of cosmic reionization",
      "publisher": "Nature Astronomy",
      "source_type": "PRIMARY_TEXT",
      "retrieved_at": "2026-09-29T06:05:50Z",
      "canonical_uri": "https://www.nature.com/articles/s41550-026-02988-2",
      "publication_date": "2026-09-24"
    },
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      "ref": "jwst_sample_excerpt",
      "excerpt": "In the currently available JWST data, this criterion is met by three galaxies in the Cycle 4 programme SPectroscopic Ultra-deep Reionization-era Survey (SPURS; PID 9214), all of which have rest-frame ultraviolet continuum detected near 1,450 Å at a signal-to-noise ratio >10 and MUV < −20.9. These systems were selected on the basis of continuum detectability, without foreknowledge of any metal absorption feature or metallicity.",
      "locator": {},
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      "ref": "jwst_resolution_excerpt",
      "excerpt": "At the spectral resolution of these data (R ≈ 1,000), the fitted profiles and measured EWs should be interpreted as effective, unresolved representations of potentially multiple narrow components.",
      "locator": {},
      "source_id": "jwst_spurs_primary",
      "excerpt_hash": "sha256:b40e21af6ff1fcb36c26372bcc5214f8958407b761049bf16dc7f00b43b526b2",
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      "ref": "jwst_interpretation_excerpt",
      "excerpt": "Velocity information alone does not uniquely distinguish between compact outflowing material and gas distributed over larger circumgalactic scales, as both scenarios can produce blueshifted absorption depending on geometry and driving mechanism. However, the observed overlapping velocity structure across multiple ions indicates that the gas is dynamically associated with the host galaxy.",
      "locator": {},
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    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "jwst_sample_evidence",
      "statement": "The result is based on three UV-bright, continuum-detected SPURS galaxies selected for signal-to-noise and luminosity, not a representative census of all z>7 galaxies.",
      "observation_type": "MEASUREMENT",
      "source_location_id": "jwst_sample_excerpt"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "jwst_resolution_evidence",
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      "source_location_id": "jwst_resolution_excerpt"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "jwst_interpretation_evidence",
      "statement": "The 50–250 km/s blueshifts are measured relative to nebular systemic redshifts and indicate galaxy-associated disturbed gas, but do not uniquely identify compact outflowing material.",
      "observation_type": "MEASUREMENT",
      "source_location_id": "jwst_interpretation_excerpt"
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  ],
  "outcome": "QUALIFIERS_FOUND",
  "searched": "Read the Nature Astronomy primary article and checked sample selection, field/program, redshift and luminosity range, spectral resolution, velocity reference, and whether blueshift uniquely proves an outflow."
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Status history

Audits

None.

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