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Wilkins","cross_cats":[],"headline":"Models with harder ionizing spectra, high ionization from massive star clusters, and enhanced nitrogen reproduce extreme emission-line ratios in z>3 galaxies.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-07T18:00:01Z","title":"Origins of Extreme Emission-Line Ratios in z > 3 Galaxies: Insights from the Lumen Model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.06769","kind":"arxiv","version":2},"verdict":{"created_at":"2026-05-11T00:45:16.201362Z","id":"ab38c5e0-87be-40e6-a73b-3340b1a37e54","model_set":{"reader":"grok-4.3"},"one_line_summary":"Lumen modeling of IllustrisTNG50 shows that high ionization parameters from massive star clusters plus enhanced nitrogen abundances are needed to reproduce the extreme [OIII]/Hβ, [OIII]/[OII], and [NII]/Hα ratios seen in z>3 galaxies.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"Models with harder ionizing spectra, high ionization from massive star clusters, and enhanced nitrogen reproduce extreme emission-line ratios in z>3 galaxies.","strongest_claim":"models combining harder ionizing spectra, elevated ionization parameters from massive star clusters, and enhanced nitrogen abundances reproduce the observed high-z galaxy population across the N2-BPT, S2-VO87, and O32-R23 diagrams.","weakest_assumption":"That the spatial distribution and properties of HII regions generated by Lumen inside IllustrisTNG50 accurately represent real high-redshift galaxies, particularly the clustering of massive star-forming regions that set the ionization parameter."}},"verdict_id":"ab38c5e0-87be-40e6-a73b-3340b1a37e54"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:60e5708fb1ba39589f1436f0a4098565948ea154a840c634f2de4345ed30a304","target":"record","created_at":"2026-07-10T01:19:00Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"e682daaed2593abfc04f2257f97bc1b72ac21cf08ce5ac3360bb0cefd51023e3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-07T18:00:01Z","title_canon_sha256":"54721c350c3ad95ce3edc9536a5447450b8a645af22ce51d6c28c277773ec5d6"},"schema_version":"1.0","source":{"id":"2605.06769","kind":"arxiv","version":2}},"canonical_sha256":"aa486a09d79549458a5a4212bc9d5cc4f01ceae6745f5d3fb233631738d74c74","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aa486a09d79549458a5a4212bc9d5cc4f01ceae6745f5d3fb233631738d74c74","first_computed_at":"2026-07-10T01:19:00.494876Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-10T01:19:00.494876Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"su6cPLnWGSUP0ZXBca9HQsIQdmjHIGOTlqz3NBmFxK3+3o6dVu9atYxqdOv6UjNqQ9Gt1JSOQTk/EDElLQ3xDQ==","signature_status":"signed_v1","signed_at":"2026-07-10T01:19:00.495273Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.06769","source_kind":"arxiv","source_version":2}}},"equivocations":[{"signer_id":"pith.science","event_type":"integrity_finding","target":"integrity","event_ids":["sha256:18530d6b990f5420c77f838df0e149f50d73976490d51889c19c7fdb9a1a68af","sha256:77b4c2416d7775f5aa8d9dd72c08232abe715d5140ceda4d911ad52c6d0bad58","sha256:7a032b7dd6b029d57d6ea0106060c7da77829b1a8e696aac60b7b88ba1844e59","sha256:c03b6cd14996b096df14c594c82d2d3ee8f13f15948a71059baad47ddf859ff3","sha256:c5b79fdafe7bed75ea87371dc0c12c97c7607a7770784666841cda4f306c345f","sha256:c9ef4c92c100a1f540f2e2f107b00c3eb6c62ecb12f7bb0fe4957daf2bb7514f"]}],"invalid_events":[],"applied_event_ids":["sha256:60e5708fb1ba39589f1436f0a4098565948ea154a840c634f2de4345ed30a304","sha256:62b510b4492f6b614971b41aac24e74e48547b4138e5c964246647c9db738d0a"],"state_sha256":"1cefd8d32dd43bf2267a2fbd6bc867cd47b09eda995073540320ca149dc2b7de"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xkl2H7de4+wNAlEElXALA5CTAxui0EF/yp/bw/UfVehX8ZHKRuWueezSF9xGFdDv74EBbeFxUDYww6hYKzjlDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T03:39:48.873520Z","bundle_sha256":"1e7adfe8bc1e7ff4cda3c25190b5e83380df1410e90f3e4e245395c557f25598"}}