{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:PEA2IMLYNEWZPNTEFLU3PIOAJT","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":"77f119581b207d99ce31d3c5be3006fd15b8ae2183bd3a92c1a0b8c0ce726862","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-05-28T20:00:17Z","title_canon_sha256":"e1ea85c02427687d14c299354c2cf3cebd6b37a9e27a82ecbd2b002f0210a71b"},"schema_version":"1.0","source":{"id":"1405.7369","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.7369","created_at":"2026-05-18T01:43:05Z"},{"alias_kind":"arxiv_version","alias_value":"1405.7369v2","created_at":"2026-05-18T01:43:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.7369","created_at":"2026-05-18T01:43:05Z"},{"alias_kind":"pith_short_12","alias_value":"PEA2IMLYNEWZ","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"PEA2IMLYNEWZPNTE","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"PEA2IMLY","created_at":"2026-05-18T12:28:43Z"}],"graph_snapshots":[{"event_id":"sha256:fb0e0b1e3832cb7b975d06c7134a3ac8850f4be7a6aed8bc49efa33d960ca9a4","target":"graph","created_at":"2026-05-18T01:43:05Z","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 use detailed nucleosynthesis calculations and a realistic prescription for the environment of the first stars to explore the first episodes of chemical enrichment that occurred during the dark ages. Based on these calculations, we propose a novel explanation for the increased prevalence of carbon-enhanced metal-poor (CEMP) stars with decreasing Fe abundance: The observed chemistry for the most metal-poor Galactic halo stars is the result of an intimate link between the explosions of the first stars and their host minihalo's ability to retain its gas. Specifically, high-energy supernovae pro","authors_text":"Piero Madau (1) ((1) University of California, Ryan Cooke (1), Santa Cruz)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-05-28T20:00:17Z","title":"Carbon-Enhanced Metal-Poor Stars: Relics from the Dark Ages"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.7369","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:ea7716a47af8aee4d3d6f40702a9a1767e44e1df60f3fbb9afbd7fea021d64d0","target":"record","created_at":"2026-05-18T01:43:05Z","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":"77f119581b207d99ce31d3c5be3006fd15b8ae2183bd3a92c1a0b8c0ce726862","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-05-28T20:00:17Z","title_canon_sha256":"e1ea85c02427687d14c299354c2cf3cebd6b37a9e27a82ecbd2b002f0210a71b"},"schema_version":"1.0","source":{"id":"1405.7369","kind":"arxiv","version":2}},"canonical_sha256":"7901a43178692d97b6642ae9b7a1c04cc23438733939ad513cd1423b8eaf64a5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7901a43178692d97b6642ae9b7a1c04cc23438733939ad513cd1423b8eaf64a5","first_computed_at":"2026-05-18T01:43:05.226486Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:43:05.226486Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wpS1VbQEn25VU+uxH5YdGkmL8KUhcCGhIXY5K6vsYcqQEha+EDZjIFT0AVgW3irDpMF8R6zCe9xpdvh4fdinDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:43:05.226872Z","signed_message":"canonical_sha256_bytes"},"source_id":"1405.7369","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ea7716a47af8aee4d3d6f40702a9a1767e44e1df60f3fbb9afbd7fea021d64d0","sha256:fb0e0b1e3832cb7b975d06c7134a3ac8850f4be7a6aed8bc49efa33d960ca9a4"],"state_sha256":"92e1d4ab3085632101782748ea38d5c7c5c7ce1383b6d5bf47665928d19e4e34"}