{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:WTCOP5RWXIJG4MF2FP6P5TKLCK","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":"32304eeeedd48d40315c94811652747e0e9c82f566a4ca54f9d8ca022b2f34f8","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-06T14:21:43Z","title_canon_sha256":"237152a523bd9ec0fd77004fb6507f93ad6c0b90f9392897a607d39358f6c51f"},"schema_version":"1.0","source":{"id":"0907.1002","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.1002","created_at":"2026-05-18T02:13:05Z"},{"alias_kind":"arxiv_version","alias_value":"0907.1002v1","created_at":"2026-05-18T02:13:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.1002","created_at":"2026-05-18T02:13:05Z"},{"alias_kind":"pith_short_12","alias_value":"WTCOP5RWXIJG","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"WTCOP5RWXIJG4MF2","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"WTCOP5RW","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:ce8063ce8a767636bf8a48e7e603034634fee447cdbd5a1c96088acef7fb1980","target":"graph","created_at":"2026-05-18T02:13:05Z","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":"It is now well established that many galaxies have nuclear star clusters (NCs) whose total masses correlate with the velocity dispersion (sigma) of the galaxy spheroid in a very similar way to the well--known supermassive black hole (SMBH) M - sigma relation. Previous theoretical work suggested that both correlations can be explained by a momentum feedback argument. Observations further show that most known NCs have masses < 10^8 Msun, while SMBHs frequently have masses > 10^8 Msun, which remained unexplained in previous work. We suggest here that this changeover reflects a competition between","authors_text":"Andrew King (Leicester), Mark I. Wilkinson, Sergei Nayakshin","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-06T14:21:43Z","title":"Competitive feedback in galaxy formation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.1002","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":"sha256:43771dfee8c8ba6e833fa11ca75f0fc32af4b7f1befe358bcf86e0174c5825be","target":"record","created_at":"2026-05-18T02:13:05Z","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":"32304eeeedd48d40315c94811652747e0e9c82f566a4ca54f9d8ca022b2f34f8","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-06T14:21:43Z","title_canon_sha256":"237152a523bd9ec0fd77004fb6507f93ad6c0b90f9392897a607d39358f6c51f"},"schema_version":"1.0","source":{"id":"0907.1002","kind":"arxiv","version":1}},"canonical_sha256":"b4c4e7f636ba126e30ba2bfcfecd4b128a9bdfe5c8b484bdf53b7716384ee9a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b4c4e7f636ba126e30ba2bfcfecd4b128a9bdfe5c8b484bdf53b7716384ee9a6","first_computed_at":"2026-05-18T02:13:05.034408Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:05.034408Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9cBsgfOwfab5GSgjZ+hXIT6xZrVJuOJK0NX+Zvy8mk2lhE0vO3j7x1okd/tLIqvFwt9s12/R5mGa8VR9E3t/Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:05.034946Z","signed_message":"canonical_sha256_bytes"},"source_id":"0907.1002","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:43771dfee8c8ba6e833fa11ca75f0fc32af4b7f1befe358bcf86e0174c5825be","sha256:ce8063ce8a767636bf8a48e7e603034634fee447cdbd5a1c96088acef7fb1980"],"state_sha256":"d5db55cc2a3263968b2a74b667c5b1297075708953394e05e61338d0b3e0e399"}