{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:22TIXATNCHCN7YV7CUFBBW7OF7","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"9a54be7043464eebfc70c86ab509aa0a2cec7044bf5c034ad3a7b61226e9768e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-25T21:01:19Z","title_canon_sha256":"873f0f56963360871a96fc41c29768fbb74d88579f0813217ab6c1d4ca5010d0"},"schema_version":"1.0","source":{"id":"1201.5383","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.5383","created_at":"2026-05-18T01:58:41Z"},{"alias_kind":"arxiv_version","alias_value":"1201.5383v1","created_at":"2026-05-18T01:58:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.5383","created_at":"2026-05-18T01:58:41Z"},{"alias_kind":"pith_short_12","alias_value":"22TIXATNCHCN","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"22TIXATNCHCN7YV7","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"22TIXATN","created_at":"2026-05-18T12:26:50Z"}],"graph_snapshots":[{"event_id":"sha256:d286d60fb8bb36f718a0c18aea4f7d4ec2f9aae4d737a3d8758e7eff2af0d6b2","target":"graph","created_at":"2026-05-18T01:58:41Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Using a new large-scale (~ 0.75 Gpc)^3 hydrodynamic cosmological simulation we investigate the growth rate of supermassive black holes in the early universe (z > 4.75). Remarkably, we find a clear peak in the typical Eddington ratio at black hole masses of 4-8 * 10^7 solar masses (typically found in halos of ~7 * 10^11 to 10^12 solar masses), independent of redshift and indicative that most of BH growth occurs in the cold-flow dominated regime. Black hole growth is by and large regulated by the evolution of gas density. The typical Eddington ratio at a given mass scales simply as cosmological ","authors_text":"Colin DeGraf, Nishikanta Khandai, Rupert Croft, Tiziana Di Matteo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-25T21:01:19Z","title":"Growth of Early Supermassive Black Holes and the High-Redshift Eddington Ratio Distribution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.5383","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:b1f87255da334ff6dad60b5f2d3548662fc5067845ee68445f105b929512e420","target":"record","created_at":"2026-05-18T01:58:41Z","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":"9a54be7043464eebfc70c86ab509aa0a2cec7044bf5c034ad3a7b61226e9768e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-25T21:01:19Z","title_canon_sha256":"873f0f56963360871a96fc41c29768fbb74d88579f0813217ab6c1d4ca5010d0"},"schema_version":"1.0","source":{"id":"1201.5383","kind":"arxiv","version":1}},"canonical_sha256":"d6a68b826d11c4dfe2bf150a10dbee2ffc29403f2ca319b3e340be40f1ed5eec","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d6a68b826d11c4dfe2bf150a10dbee2ffc29403f2ca319b3e340be40f1ed5eec","first_computed_at":"2026-05-18T01:58:41.889073Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:41.889073Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7j8qaUohxZJ67jXChxSkNWoMiY8Tfpb4NGMLptkv+qm52A8vXGUc7vvCz/ysUJQfxvQnML7Z+hyJRCDTY7M6DA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:41.889699Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.5383","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b1f87255da334ff6dad60b5f2d3548662fc5067845ee68445f105b929512e420","sha256:d286d60fb8bb36f718a0c18aea4f7d4ec2f9aae4d737a3d8758e7eff2af0d6b2"],"state_sha256":"29e0d13d4feac22208074fce983d8ddc6a5806012dec2ace65073ba5c6cb0fae"}