{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:MFNF6GRXYQ4S42IIGH7653YCRB","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":"05474c9507537f36f6f4efcd0be83005df4ee5744258a76d33163f86068ae30e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-09-25T18:00:32Z","title_canon_sha256":"c60632c35b6d23e43ba4ed6f8f7304152374e7953653cbc4eac41aa0223930cc"},"schema_version":"1.0","source":{"id":"1709.08647","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.08647","created_at":"2026-05-18T00:27:43Z"},{"alias_kind":"arxiv_version","alias_value":"1709.08647v2","created_at":"2026-05-18T00:27:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.08647","created_at":"2026-05-18T00:27:43Z"},{"alias_kind":"pith_short_12","alias_value":"MFNF6GRXYQ4S","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"MFNF6GRXYQ4S42II","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"MFNF6GRX","created_at":"2026-05-18T12:31:31Z"}],"graph_snapshots":[{"event_id":"sha256:ca4ffa27184c4c7f5041c59fd2fe876837f2a2e0278e8315a7c2111523581092","target":"graph","created_at":"2026-05-18T00:27:43Z","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 possible for hydrodynamical simulations to reproduce a representative galaxy population. Accordingly, it is timely to assess critically some of the assumptions of traditional semi-analytic galaxy formation models. We use the Eagle simulations to assess assumptions built into the Galform semi-analytic model, focussing on those relating to baryon cycling, angular momentum and feedback. We show that the assumption in Galform that newly formed stars have the same specific angular momentum as the total disc leads to a significant overestimate of the total stellar specific angular momentum","authors_text":"Carlos S. Frenk, Cedric G. Lacey, Claudia D. P. Lagos, John C. Helly, Matthieu Schaller, Peter D. Mitchell, Richard G. Bower, Shaun Cole, Tom Theuns, Violeta Gonzalez-Perez","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-09-25T18:00:32Z","title":"Comparing galaxy formation in semi-analytic models and hydrodynamical simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.08647","kind":"arxiv","version":2},"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:ec3c301cfe3b9c9fbb57186a78235d44c5a65d2a2c15dc37f1eb628333b4e68b","target":"record","created_at":"2026-05-18T00:27:43Z","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":"05474c9507537f36f6f4efcd0be83005df4ee5744258a76d33163f86068ae30e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-09-25T18:00:32Z","title_canon_sha256":"c60632c35b6d23e43ba4ed6f8f7304152374e7953653cbc4eac41aa0223930cc"},"schema_version":"1.0","source":{"id":"1709.08647","kind":"arxiv","version":2}},"canonical_sha256":"615a5f1a37c4392e690831ffeeef02885ee84a0e5567f358750823d559108ec5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"615a5f1a37c4392e690831ffeeef02885ee84a0e5567f358750823d559108ec5","first_computed_at":"2026-05-18T00:27:43.126184Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:43.126184Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1fq4fbBxIJZFzVEItq9kkQqZ3Oi63Hd33VvpB1gKuaJW1lASho7kGUdLxs54znq+vBICBzVyGmSOOGfV31pJDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:43.126737Z","signed_message":"canonical_sha256_bytes"},"source_id":"1709.08647","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ec3c301cfe3b9c9fbb57186a78235d44c5a65d2a2c15dc37f1eb628333b4e68b","sha256:ca4ffa27184c4c7f5041c59fd2fe876837f2a2e0278e8315a7c2111523581092"],"state_sha256":"cb7f63ed4a64687dcd345bb7d738e6b83ce6574b563148b160b4622f2a58c9ea"}