{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:QRVPHTAMNUTLQCN2CWN5ZXT3XI","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":"098205aa8aec134e7cb079656cd4845e975ccc8421e4ddbcf0bf72245429ea8b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-03T14:30:38Z","title_canon_sha256":"f9962b028939263d1fb2be68c4ea1a6c746cb59141b151df51a73e2caeeb98e5"},"schema_version":"1.0","source":{"id":"0810.0652","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.0652","created_at":"2026-05-18T02:15:32Z"},{"alias_kind":"arxiv_version","alias_value":"0810.0652v1","created_at":"2026-05-18T02:15:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.0652","created_at":"2026-05-18T02:15:32Z"},{"alias_kind":"pith_short_12","alias_value":"QRVPHTAMNUTL","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"QRVPHTAMNUTLQCN2","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"QRVPHTAM","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:5a850bf1b48b7e74258b3d3da2afa4cc2228bde4e49ced62c1fa6fd2dcc4ac33","target":"graph","created_at":"2026-05-18T02:15:32Z","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":"We review general characteristics of massive stars, present the main observable constraints that stellar models should reproduce. We discuss the impact of massive star nucleosynthesis on the early phases of the chemical evolution of the Milky Way (MW). We show that rotating models can account for the important primary nitrogen production needed at low metallicity. Interestingly such rotating models can also better account for other features as the variation with the metallicity of the C/O ratio. Damped Lyman Alpha (DLA) systems present similar characteristics as the halo of the MW for what con","authors_text":"Andre Maeder, Cristina Chiappini, Cyril Georgy, Georges Meynet, Marco Pignatari, Raphael Hirschi, Sylvia Ekstrom","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-03T14:30:38Z","title":"Evolution and chemical and dynamical effects of high-mass stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.0652","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":"sha256:009fae9bab6d3ebb30c4c218dcdaa2a36507aaaf2c704cc228b8962eff9e86f6","target":"record","created_at":"2026-05-18T02:15:32Z","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":"098205aa8aec134e7cb079656cd4845e975ccc8421e4ddbcf0bf72245429ea8b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-03T14:30:38Z","title_canon_sha256":"f9962b028939263d1fb2be68c4ea1a6c746cb59141b151df51a73e2caeeb98e5"},"schema_version":"1.0","source":{"id":"0810.0652","kind":"arxiv","version":1}},"canonical_sha256":"846af3cc0c6d26b809ba159bdcde7bba2740ecb6aef459624e26de3a8c77e768","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"846af3cc0c6d26b809ba159bdcde7bba2740ecb6aef459624e26de3a8c77e768","first_computed_at":"2026-05-18T02:15:32.949648Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:15:32.949648Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TwtdesSq93iCTOBr9016FhB2Q06LxItoGbkVceSO50n6Pyj5WWjcSJI/0UbjKzb+rT9tgMGWkCnEffAEYe4JBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:15:32.950254Z","signed_message":"canonical_sha256_bytes"},"source_id":"0810.0652","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:009fae9bab6d3ebb30c4c218dcdaa2a36507aaaf2c704cc228b8962eff9e86f6","sha256:5a850bf1b48b7e74258b3d3da2afa4cc2228bde4e49ced62c1fa6fd2dcc4ac33"],"state_sha256":"cd960a3e4d26581664823da91087c6e7b76d701a4bf56f481603f3200046f326"}