{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:V6MELXAEGYEUWFOYLME3JQWDBB","short_pith_number":"pith:V6MELXAE","canonical_record":{"source":{"id":"1205.1434","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-05-07T15:42:27Z","cross_cats_sorted":[],"title_canon_sha256":"04886701967d2a6a5b559ddfdd98bd933ddca68a1172a7288f325765690ba96a","abstract_canon_sha256":"55801483d0ff7272e14683b5300685c858ccde2901bbf838709bb3c63ab5776f"},"schema_version":"1.0"},"canonical_sha256":"af9845dc0436094b15d85b09b4c2c30869d07473d5cdcff62bd32a54598d2736","source":{"kind":"arxiv","id":"1205.1434","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.1434","created_at":"2026-05-18T01:57:37Z"},{"alias_kind":"arxiv_version","alias_value":"1205.1434v1","created_at":"2026-05-18T01:57:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.1434","created_at":"2026-05-18T01:57:37Z"},{"alias_kind":"pith_short_12","alias_value":"V6MELXAEGYEU","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"V6MELXAEGYEUWFOY","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"V6MELXAE","created_at":"2026-05-18T12:27:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:V6MELXAEGYEUWFOYLME3JQWDBB","target":"record","payload":{"canonical_record":{"source":{"id":"1205.1434","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-05-07T15:42:27Z","cross_cats_sorted":[],"title_canon_sha256":"04886701967d2a6a5b559ddfdd98bd933ddca68a1172a7288f325765690ba96a","abstract_canon_sha256":"55801483d0ff7272e14683b5300685c858ccde2901bbf838709bb3c63ab5776f"},"schema_version":"1.0"},"canonical_sha256":"af9845dc0436094b15d85b09b4c2c30869d07473d5cdcff62bd32a54598d2736","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:57:37.226455Z","signature_b64":"vtdkNO0fRczz/JxZ9Gzu0rfvdnyGC4hIzpRt7rbADkOqfY5uRTEguklft1/95B8So5OUq0VA1ujR8UMVzlCzAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"af9845dc0436094b15d85b09b4c2c30869d07473d5cdcff62bd32a54598d2736","last_reissued_at":"2026-05-18T01:57:37.225743Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:57:37.225743Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1205.1434","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:57:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"le9R8QegqG9eBqfzfBhXMAHTT+SQcMPk2ANmSvC6RfPcilvyajn5WfJ2hZ7i9lpUwfjY3kaXwG3T7P2h9AHvCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:03:06.538659Z"},"content_sha256":"a4bd9f9b142979a0b5e592df27e95479c8786a09f256035f2c41df05d77cde28","schema_version":"1.0","event_id":"sha256:a4bd9f9b142979a0b5e592df27e95479c8786a09f256035f2c41df05d77cde28"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:V6MELXAEGYEUWFOYLME3JQWDBB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The formation of young dense star clusters through mergers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Michiko S. Fujii, Simon F. Portegies Zwart, Takayuki R. Saitoh","submitted_at":"2012-05-07T15:42:27Z","abstract_excerpt":"Young star clusters like R136 in the Large Magellanic Cloud and NGC 3603, Westerlund 1, and 2 in the Milky Way are dynamically more evolved than expected based on their current relaxation times. In particular, the combination of a high degree of mass segregation, a relatively low central density, and the large number of massive runaway stars in their vicinity are hard to explain with the monolithic formation of these clusters. Young star clusters can achieve such a mature dynamical state if they formed through the mergers of a number of less massive clusters. The shorter relaxation times of le"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.1434","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:57:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3918CMeiMfuv5/dsYoi2lOUs7PRKkg4hzpypZb3fH/eJWFYaLzAaVnGkHKW9raMWTo0IWpiwvv4/zMSrQO6PAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:03:06.539016Z"},"content_sha256":"f026de5ea43477f5c5197611526d4556cd58a826d3f2ba557a23f7c012a57505","schema_version":"1.0","event_id":"sha256:f026de5ea43477f5c5197611526d4556cd58a826d3f2ba557a23f7c012a57505"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/V6MELXAEGYEUWFOYLME3JQWDBB/bundle.json","state_url":"https://pith.science/pith/V6MELXAEGYEUWFOYLME3JQWDBB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/V6MELXAEGYEUWFOYLME3JQWDBB/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-03T14:03:06Z","links":{"resolver":"https://pith.science/pith/V6MELXAEGYEUWFOYLME3JQWDBB","bundle":"https://pith.science/pith/V6MELXAEGYEUWFOYLME3JQWDBB/bundle.json","state":"https://pith.science/pith/V6MELXAEGYEUWFOYLME3JQWDBB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/V6MELXAEGYEUWFOYLME3JQWDBB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:V6MELXAEGYEUWFOYLME3JQWDBB","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":"55801483d0ff7272e14683b5300685c858ccde2901bbf838709bb3c63ab5776f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-05-07T15:42:27Z","title_canon_sha256":"04886701967d2a6a5b559ddfdd98bd933ddca68a1172a7288f325765690ba96a"},"schema_version":"1.0","source":{"id":"1205.1434","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.1434","created_at":"2026-05-18T01:57:37Z"},{"alias_kind":"arxiv_version","alias_value":"1205.1434v1","created_at":"2026-05-18T01:57:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.1434","created_at":"2026-05-18T01:57:37Z"},{"alias_kind":"pith_short_12","alias_value":"V6MELXAEGYEU","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"V6MELXAEGYEUWFOY","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"V6MELXAE","created_at":"2026-05-18T12:27:25Z"}],"graph_snapshots":[{"event_id":"sha256:f026de5ea43477f5c5197611526d4556cd58a826d3f2ba557a23f7c012a57505","target":"graph","created_at":"2026-05-18T01:57:37Z","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":"Young star clusters like R136 in the Large Magellanic Cloud and NGC 3603, Westerlund 1, and 2 in the Milky Way are dynamically more evolved than expected based on their current relaxation times. In particular, the combination of a high degree of mass segregation, a relatively low central density, and the large number of massive runaway stars in their vicinity are hard to explain with the monolithic formation of these clusters. Young star clusters can achieve such a mature dynamical state if they formed through the mergers of a number of less massive clusters. The shorter relaxation times of le","authors_text":"Michiko S. Fujii, Simon F. Portegies Zwart, Takayuki R. Saitoh","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-05-07T15:42:27Z","title":"The formation of young dense star clusters through mergers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.1434","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:a4bd9f9b142979a0b5e592df27e95479c8786a09f256035f2c41df05d77cde28","target":"record","created_at":"2026-05-18T01:57:37Z","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":"55801483d0ff7272e14683b5300685c858ccde2901bbf838709bb3c63ab5776f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-05-07T15:42:27Z","title_canon_sha256":"04886701967d2a6a5b559ddfdd98bd933ddca68a1172a7288f325765690ba96a"},"schema_version":"1.0","source":{"id":"1205.1434","kind":"arxiv","version":1}},"canonical_sha256":"af9845dc0436094b15d85b09b4c2c30869d07473d5cdcff62bd32a54598d2736","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"af9845dc0436094b15d85b09b4c2c30869d07473d5cdcff62bd32a54598d2736","first_computed_at":"2026-05-18T01:57:37.225743Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:57:37.225743Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vtdkNO0fRczz/JxZ9Gzu0rfvdnyGC4hIzpRt7rbADkOqfY5uRTEguklft1/95B8So5OUq0VA1ujR8UMVzlCzAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:57:37.226455Z","signed_message":"canonical_sha256_bytes"},"source_id":"1205.1434","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a4bd9f9b142979a0b5e592df27e95479c8786a09f256035f2c41df05d77cde28","sha256:f026de5ea43477f5c5197611526d4556cd58a826d3f2ba557a23f7c012a57505"],"state_sha256":"761c824152be20a57f65fdd0029e19b822ac977448353e894b2eabbd165d495c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wG04e/0ToaD+2axg8UfnlCGQVvS/TimyLd4A4ch/KDa/cEXX+dYECLwGRWLBleRvH6/XlmP2S1SX43WypZaKCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T14:03:06.541001Z","bundle_sha256":"687076eca5893d86445b94052630ad69aec31adda649796b2a5abc9de0035034"}}