{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:UVCHX3ZJEOPP5GU2UXLK6JPX4F","short_pith_number":"pith:UVCHX3ZJ","schema_version":"1.0","canonical_sha256":"a5447bef29239efe9a9aa5d6af25f7e17fe7337e5b050409f1a3fd6a40ed4ac4","source":{"kind":"arxiv","id":"2402.08729","version":2},"attestation_state":"computed","paper":{"title":"The Nature and Evolution of Early Massive Quenched Galaxies in the Simba-C Simulation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Douglas Rennehan, Jakub Szpila, Renier Hough, Romeel Dav\\'e, Weiguang Cui","submitted_at":"2024-02-13T19:00:20Z","abstract_excerpt":"We examine the nature, origin, and fate of early ($z\\geq 2$) massive ($M_\\star>10^{10}M_\\odot$) quenched galaxies (EQGs) in a new $(100h^{-1}{\\rm Mpc}^3)$ run of the Simba-C galaxy formation model. We define ``quenched'' to be $>4\\sigma$ below an iterative polynomial fit to the star-forming sequence (SFS), and find that Simba-C produces EQGs as early as $z\\sim 5$ and number densities agreeing with observations at $z\\leq 3$ (though slightly low at $z\\geq 4$). Using a photometric-based EQG selection or a fixed sSFR cut of $10^{-10}$yr$^{-1}$ yields similar results. EQGs predominantly arise in ce"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2402.08729","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-02-13T19:00:20Z","cross_cats_sorted":[],"title_canon_sha256":"0bc34bc7917ca4b2e8d5a55e6a369bea87b892e762a30100553899faf3405a38","abstract_canon_sha256":"1f560c279af54a9ba7903ba1df1d5df9e4bbeb9a0038dc893c9524a68ceba93a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:04:11.760011Z","signature_b64":"loSEmGhrSa+kTNAp3yQUwlbUTUAXl8/EHr4/HsVvR8sXycdYgw+WsKSGYKc6TYHr4kpY1T2vdtOqwrryyGdbBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a5447bef29239efe9a9aa5d6af25f7e17fe7337e5b050409f1a3fd6a40ed4ac4","last_reissued_at":"2026-07-05T10:04:11.759561Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:04:11.759561Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Nature and Evolution of Early Massive Quenched Galaxies in the Simba-C Simulation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Douglas Rennehan, Jakub Szpila, Renier Hough, Romeel Dav\\'e, Weiguang Cui","submitted_at":"2024-02-13T19:00:20Z","abstract_excerpt":"We examine the nature, origin, and fate of early ($z\\geq 2$) massive ($M_\\star>10^{10}M_\\odot$) quenched galaxies (EQGs) in a new $(100h^{-1}{\\rm Mpc}^3)$ run of the Simba-C galaxy formation model. We define ``quenched'' to be $>4\\sigma$ below an iterative polynomial fit to the star-forming sequence (SFS), and find that Simba-C produces EQGs as early as $z\\sim 5$ and number densities agreeing with observations at $z\\leq 3$ (though slightly low at $z\\geq 4$). Using a photometric-based EQG selection or a fixed sSFR cut of $10^{-10}$yr$^{-1}$ yields similar results. EQGs predominantly arise in ce"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2402.08729","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2402.08729/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"2402.08729","created_at":"2026-07-05T10:04:11.759619+00:00"},{"alias_kind":"arxiv_version","alias_value":"2402.08729v2","created_at":"2026-07-05T10:04:11.759619+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2402.08729","created_at":"2026-07-05T10:04:11.759619+00:00"},{"alias_kind":"pith_short_12","alias_value":"UVCHX3ZJEOPP","created_at":"2026-07-05T10:04:11.759619+00:00"},{"alias_kind":"pith_short_16","alias_value":"UVCHX3ZJEOPP5GU2","created_at":"2026-07-05T10:04:11.759619+00:00"},{"alias_kind":"pith_short_8","alias_value":"UVCHX3ZJ","created_at":"2026-07-05T10:04:11.759619+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2412.08336","citing_title":"A first measurement of galaxy merger rate increasing in dynamically colder protoclusters at cosmic noon","ref_index":109,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/UVCHX3ZJEOPP5GU2UXLK6JPX4F","json":"https://pith.science/pith/UVCHX3ZJEOPP5GU2UXLK6JPX4F.json","graph_json":"https://pith.science/api/pith-number/UVCHX3ZJEOPP5GU2UXLK6JPX4F/graph.json","events_json":"https://pith.science/api/pith-number/UVCHX3ZJEOPP5GU2UXLK6JPX4F/events.json","paper":"https://pith.science/paper/UVCHX3ZJ"},"agent_actions":{"view_html":"https://pith.science/pith/UVCHX3ZJEOPP5GU2UXLK6JPX4F","download_json":"https://pith.science/pith/UVCHX3ZJEOPP5GU2UXLK6JPX4F.json","view_paper":"https://pith.science/paper/UVCHX3ZJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2402.08729&json=true","fetch_graph":"https://pith.science/api/pith-number/UVCHX3ZJEOPP5GU2UXLK6JPX4F/graph.json","fetch_events":"https://pith.science/api/pith-number/UVCHX3ZJEOPP5GU2UXLK6JPX4F/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/UVCHX3ZJEOPP5GU2UXLK6JPX4F/action/timestamp_anchor","attest_storage":"https://pith.science/pith/UVCHX3ZJEOPP5GU2UXLK6JPX4F/action/storage_attestation","attest_author":"https://pith.science/pith/UVCHX3ZJEOPP5GU2UXLK6JPX4F/action/author_attestation","sign_citation":"https://pith.science/pith/UVCHX3ZJEOPP5GU2UXLK6JPX4F/action/citation_signature","submit_replication":"https://pith.science/pith/UVCHX3ZJEOPP5GU2UXLK6JPX4F/action/replication_record"}},"created_at":"2026-07-05T10:04:11.759619+00:00","updated_at":"2026-07-05T10:04:11.759619+00:00"}