{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:L5DYS4D7HMCJNH5LWWJFCYNSNS","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":"e33d06d8922473df784d5a0fccff42744f24721bc163629993407c1df63eb2ec","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-09-12T18:00:03Z","title_canon_sha256":"13b9765bfe91a2c12f61c097e63b9432df9c968d2d383faeb00c9398c8fef865"},"schema_version":"1.0","source":{"id":"2509.10609","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.10609","created_at":"2026-07-05T12:11:24Z"},{"alias_kind":"arxiv_version","alias_value":"2509.10609v1","created_at":"2026-07-05T12:11:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.10609","created_at":"2026-07-05T12:11:24Z"},{"alias_kind":"pith_short_12","alias_value":"L5DYS4D7HMCJ","created_at":"2026-07-05T12:11:24Z"},{"alias_kind":"pith_short_16","alias_value":"L5DYS4D7HMCJNH5L","created_at":"2026-07-05T12:11:24Z"},{"alias_kind":"pith_short_8","alias_value":"L5DYS4D7","created_at":"2026-07-05T12:11:24Z"}],"graph_snapshots":[{"event_id":"sha256:c15f55e1cecdfb55daa855f33474a15521fea0ca7c50da19969045ff7aee1a13","target":"graph","created_at":"2026-07-05T12:11:24Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2509.10609/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"GW231123 is the most massive binary black hole (BBH) merger detected to date by the LIGO-Virgo-KAGRA collaboration. With at least one black hole (BH) in the upper-mass gap and both BHs exhibiting high spins ($\\chi_{1,2} \\gtrsim 0.8$), this event challenges standard isolated binary evolution models. A compelling alternative is a dynamical origin in star clusters, where stellar binaries and hierarchical mergers may both contribute to the formation of similar BBHs. In this work, we investigate the formation of GW231123-like events in different cluster environments using the B-POP semi-analytic po","authors_text":"Cristiano Ugolini, Lavinia Paiella, Manuel Arca Sedda, Marica Branchesi, Mario Spera","cross_cats":["astro-ph.HE"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-09-12T18:00:03Z","title":"Assembling GW231123 in star clusters through the combination of stellar binary evolution and hierarchical mergers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.10609","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":"sha256:2acc0079ce0db61b622016e46627375ddf849798b0b5658c30d1e9574ba0a078","target":"record","created_at":"2026-07-05T12:11:24Z","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":"e33d06d8922473df784d5a0fccff42744f24721bc163629993407c1df63eb2ec","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-09-12T18:00:03Z","title_canon_sha256":"13b9765bfe91a2c12f61c097e63b9432df9c968d2d383faeb00c9398c8fef865"},"schema_version":"1.0","source":{"id":"2509.10609","kind":"arxiv","version":1}},"canonical_sha256":"5f4789707f3b04969fabb5925161b26c8912d2cd8d12ef7c5a39b562edc2193a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5f4789707f3b04969fabb5925161b26c8912d2cd8d12ef7c5a39b562edc2193a","first_computed_at":"2026-07-05T12:11:24.230057Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T12:11:24.230057Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"X19kpc6ab+9GEQ/z48CFWkDqsDJNymYlItkKukOhW6vFidD6gEYH8rgwklJpPwDP+Nw2UGKtHRPVK1JASDd+Dg==","signature_status":"signed_v1","signed_at":"2026-07-05T12:11:24.230590Z","signed_message":"canonical_sha256_bytes"},"source_id":"2509.10609","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2acc0079ce0db61b622016e46627375ddf849798b0b5658c30d1e9574ba0a078","sha256:c15f55e1cecdfb55daa855f33474a15521fea0ca7c50da19969045ff7aee1a13"],"state_sha256":"555edc129fc4d3cd75658006b7a79f05bd147fdbca3a735bbd9cf9b71ee1ab90"}