{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:ZWGAECSVIFCQQ7FTL6UPTSBXQG","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":"1af8ffe64d95f19879a2a241aaed8d8ff11724a2c641fe53e739fdbeb5df389c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-21T21:00:21Z","title_canon_sha256":"b7916b9831219862ee19d1f628a77cf32231509c0e467d562bd1ddd153938a22"},"schema_version":"1.0","source":{"id":"1001.3874","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.3874","created_at":"2026-05-18T02:09:31Z"},{"alias_kind":"arxiv_version","alias_value":"1001.3874v1","created_at":"2026-05-18T02:09:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.3874","created_at":"2026-05-18T02:09:31Z"},{"alias_kind":"pith_short_12","alias_value":"ZWGAECSVIFCQ","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"ZWGAECSVIFCQQ7FT","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"ZWGAECSV","created_at":"2026-05-18T12:26:18Z"}],"graph_snapshots":[{"event_id":"sha256:d12417454fc825e439c71e851b95edcdb998ac17f095ec913089bb7fcf2809f3","target":"graph","created_at":"2026-05-18T02:09:31Z","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":"Galactic nuclei host central massive objects either in the form of supermassive black holes or nuclear stellar clusters. Recent investigations have shown that both components co-exist in at least a few galaxies. In this paper we explore the possibility of a connection between nuclear star clusters and black holes that establishes at the moment of their formation. We here model the evolution of high redshift discs, hosted in dark matter halos with virial temperatures 10^4 K, whose gas has been polluted with metals just above the critical metallicity for fragmentation. A nuclear cluster forms as","authors_text":"B. Devecchi, F. Haardt, M. Colpi, M. Volonteri","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-21T21:00:21Z","title":"High redshift formation and evolution of central massive objects I: model description"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.3874","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":"sha256:9229ebf7ef586ad8b0fe05be2f1b645558b2f81ebaf5d7004a3935a66a6cb19c","target":"record","created_at":"2026-05-18T02:09:31Z","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":"1af8ffe64d95f19879a2a241aaed8d8ff11724a2c641fe53e739fdbeb5df389c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-21T21:00:21Z","title_canon_sha256":"b7916b9831219862ee19d1f628a77cf32231509c0e467d562bd1ddd153938a22"},"schema_version":"1.0","source":{"id":"1001.3874","kind":"arxiv","version":1}},"canonical_sha256":"cd8c020a554145087cb35fa8f9c83781bf69de67829c4598325f47fa0dde48d9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cd8c020a554145087cb35fa8f9c83781bf69de67829c4598325f47fa0dde48d9","first_computed_at":"2026-05-18T02:09:31.328405Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:31.328405Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+QE/vOqNSYAPs+qzoDObUgqQ+o02YBiRMluE7uR87QQpasmdhRmIxfBDdMdo3deYdfzEFZ4wqgc1Xyr1qaaxCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:31.329038Z","signed_message":"canonical_sha256_bytes"},"source_id":"1001.3874","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9229ebf7ef586ad8b0fe05be2f1b645558b2f81ebaf5d7004a3935a66a6cb19c","sha256:d12417454fc825e439c71e851b95edcdb998ac17f095ec913089bb7fcf2809f3"],"state_sha256":"e686107def9f0822e38a85581e846a560a1514c918f223ac56dfd98c744ac93e"}