{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:L56R7FLTVDR2KR6VWRO2MIRMZQ","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":"7ced674f3df1c6fe7b28c2d4956ad4fb8ab79272a771a3a318ede9b6fc3a8814","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-10-12T13:01:50Z","title_canon_sha256":"12cff2f6606782517c0185f190650a465cae06a281fa1710e029d9d81774158b"},"schema_version":"1.0","source":{"id":"0910.2158","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.2158","created_at":"2026-05-18T02:11:24Z"},{"alias_kind":"arxiv_version","alias_value":"0910.2158v1","created_at":"2026-05-18T02:11:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.2158","created_at":"2026-05-18T02:11:24Z"},{"alias_kind":"pith_short_12","alias_value":"L56R7FLTVDR2","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"L56R7FLTVDR2KR6V","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"L56R7FLT","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:4186e0b921336c91b0d49e78f253f6a4698e57171c01c0231ca260853527efc2","target":"graph","created_at":"2026-05-18T02:11:24Z","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"},"paper":{"abstract_excerpt":"The carbon-enhanced metal-poor (CEMP) stars constitute approximately one fifth of the metal-poor ([Fe/H] ~< -2) population but their origin is not well understood. The most widely accepted formation scenario, invokes mass-transfer of carbon-rich material from a thermally-pulsing asymptotic giant branch (TPAGB) primary star to a less massive main-sequence companion which is seen today. Recent studies explore the possibility that an initial mass function biased toward intermediate-mass stars is required to reproduce the observed CEMP fraction in stars with metallicity [Fe/H] < -2.5. These models","authors_text":"2), 3), 5), Astronomy, Evert Glebbeek (1, McMaster University (4) Institute of Astronomy, Monash University), Onno Pols (1) ((1) Sterrenkundig Instituut, Richard J. Stancliffe (4, Robert G. Izzard (1, Universiteit Utrecht (2) Institut d'Astronomie et d'Astrophysique, Universit\\'e Libre de Bruxelles (3) Department of Physics, University of Cambridge (5) School of Mathematical Sciences","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-10-12T13:01:50Z","title":"Population Synthesis of Binary Carbon-enhanced Metal-poor Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.2158","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:e6f2ec43441d0210753487566c6cf4284e210f9e27ecaa413e086a589a67abac","target":"record","created_at":"2026-05-18T02:11:24Z","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":"7ced674f3df1c6fe7b28c2d4956ad4fb8ab79272a771a3a318ede9b6fc3a8814","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-10-12T13:01:50Z","title_canon_sha256":"12cff2f6606782517c0185f190650a465cae06a281fa1710e029d9d81774158b"},"schema_version":"1.0","source":{"id":"0910.2158","kind":"arxiv","version":1}},"canonical_sha256":"5f7d1f9573a8e3a547d5b45da6222ccc00dfa275de8f524d226fe737817d12fc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5f7d1f9573a8e3a547d5b45da6222ccc00dfa275de8f524d226fe737817d12fc","first_computed_at":"2026-05-18T02:11:24.606658Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:24.606658Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Wxyoo4TefORIVDDjtRcZsk7ZEJhNE6qqre1QfzsS6LYtn6JVyKbRUMQAtnhl2EVABRQva82xLKg0Hg/yON1KBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:24.607411Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.2158","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e6f2ec43441d0210753487566c6cf4284e210f9e27ecaa413e086a589a67abac","sha256:4186e0b921336c91b0d49e78f253f6a4698e57171c01c0231ca260853527efc2"],"state_sha256":"d64d0972510384ca44311a639dc5167705ccf6e185648a2a27afdf82556144bb"}