{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:ORYBHRA5PTQTQTEYO4VVRKZIQB","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":"06efe22045220a56802aeed06514ac9e99e74db87032a7071162304f3fa6c03b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-02-15T11:03:17Z","title_canon_sha256":"5e91eb28bfdf4391daf99120e3bcb6965ec7c976dc9cc926cd1b198658e92845"},"schema_version":"1.0","source":{"id":"1002.2850","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.2850","created_at":"2026-05-18T02:09:08Z"},{"alias_kind":"arxiv_version","alias_value":"1002.2850v1","created_at":"2026-05-18T02:09:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.2850","created_at":"2026-05-18T02:09:08Z"},{"alias_kind":"pith_short_12","alias_value":"ORYBHRA5PTQT","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"ORYBHRA5PTQTQTEY","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"ORYBHRA5","created_at":"2026-05-18T12:26:12Z"}],"graph_snapshots":[{"event_id":"sha256:d4a3b70b2f4202eb182f2f38195a4f2f0591f301fc26c691befcf4a487e5c89b","target":"graph","created_at":"2026-05-18T02:09:08Z","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":"In massive primordial galaxies, the gas may directly collapse and form a single central massive object if cooling is suppressed. Line cooling by molecular hydrogen can be suppressed in the presence of a strong soft-ultraviolet radiation field, but the role played by other cooling mechanisms is less clear. In optically thin gas, Lyman-Alpha cooling can be very effective, maintaining the gas temperature below 10^4 K over many orders of magnitude in density. However, the large neutral hydrogen column densities present in primordial galaxies render them highly optically thick to Lyman-Alpha photon","authors_text":"Dominik R. G. Schleicher, Marco Spaans, Simon C. O. Glover","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-02-15T11:03:17Z","title":"Black hole formation in primordial galaxies: chemical and radiative conditions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.2850","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:ff1c84385e4a9b1f38c18f04319ace59dc9b27dc9ad20c36ae8d0d319db8b910","target":"record","created_at":"2026-05-18T02:09:08Z","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":"06efe22045220a56802aeed06514ac9e99e74db87032a7071162304f3fa6c03b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-02-15T11:03:17Z","title_canon_sha256":"5e91eb28bfdf4391daf99120e3bcb6965ec7c976dc9cc926cd1b198658e92845"},"schema_version":"1.0","source":{"id":"1002.2850","kind":"arxiv","version":1}},"canonical_sha256":"747013c41d7ce1384c98772b58ab28804cc0dbad7b384e4a4c96091e52b34746","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"747013c41d7ce1384c98772b58ab28804cc0dbad7b384e4a4c96091e52b34746","first_computed_at":"2026-05-18T02:09:08.302480Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:08.302480Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rgr5zB5AhJ92CR2ggGWQAfLw5l00GRHBI1Nqkjg2mPRBI0E6HKerndzzTF7stiwXc4BR+lQw+qLpsowwIFXhBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:08.303023Z","signed_message":"canonical_sha256_bytes"},"source_id":"1002.2850","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ff1c84385e4a9b1f38c18f04319ace59dc9b27dc9ad20c36ae8d0d319db8b910","sha256:d4a3b70b2f4202eb182f2f38195a4f2f0591f301fc26c691befcf4a487e5c89b"],"state_sha256":"93b4e3b50a4a67942d7a8067b94e58005c1077102989f14244d7c6c9c4f4fa95"}