{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2010:X2GVCSCXAQRPNLQ6VIIEQPENLC","short_pith_number":"pith:X2GVCSCX","schema_version":"1.0","canonical_sha256":"be8d5148570422f6ae1eaa10483c8d58820ab32a05811a547d4f821fbc2fc38d","source":{"kind":"arxiv","id":"1001.1864","version":1},"attestation_state":"computed","paper":{"title":"Origin of CEMP stars: What helium and lithium can tell us about CEMP stars?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Andre Maeder, Cristina Chiappini, Cyril Georgy, Georges Meynet, Patrick Eggenberger, Raphael Hirschi, Sylvia Ekstrom","submitted_at":"2010-01-12T12:28:12Z","abstract_excerpt":"We show that the peculiar surface abundance patterns of Carbon Enhanced Metal Poor (CEMP) stars has been inherited from material having been processed by H- and He-burning phases in a previous generation of stars (hereafter called the ``Source Stars''). In this previous generation, some mixing must have occurred between the He- and the H-burning regions in order to explain the high observed abundances of nitrogen. In addition, it is necessary to postulate that a very small fraction of the carbon-oxygen core has been expelled (either by winds or by the supernova explosion). Therefore only the m"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1001.1864","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-01-12T12:28:12Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"9a609ff7d11ad65e2bcded606fcb255b89c96a3ecaa45f4d11a18dabd070a5a8","abstract_canon_sha256":"4b2084943796c5d9bf541c349e404b07f4d2a36f2743a947071bc99a7a6cf57b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:33:26.699043Z","signature_b64":"+DMV3aZU/Ktzk12dgMyHQq/BHiJlYwUqUYwpqoKZ7+4SuHr4FelH+Y6cT5DyHAycFpIEf4x/0aJVWT8bLD54AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"be8d5148570422f6ae1eaa10483c8d58820ab32a05811a547d4f821fbc2fc38d","last_reissued_at":"2026-05-18T00:33:26.698258Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:33:26.698258Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Origin of CEMP stars: What helium and lithium can tell us about CEMP stars?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Andre Maeder, Cristina Chiappini, Cyril Georgy, Georges Meynet, Patrick Eggenberger, Raphael Hirschi, Sylvia Ekstrom","submitted_at":"2010-01-12T12:28:12Z","abstract_excerpt":"We show that the peculiar surface abundance patterns of Carbon Enhanced Metal Poor (CEMP) stars has been inherited from material having been processed by H- and He-burning phases in a previous generation of stars (hereafter called the ``Source Stars''). In this previous generation, some mixing must have occurred between the He- and the H-burning regions in order to explain the high observed abundances of nitrogen. In addition, it is necessary to postulate that a very small fraction of the carbon-oxygen core has been expelled (either by winds or by the supernova explosion). Therefore only the m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.1864","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1001.1864","created_at":"2026-05-18T00:33:26.698387+00:00"},{"alias_kind":"arxiv_version","alias_value":"1001.1864v1","created_at":"2026-05-18T00:33:26.698387+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.1864","created_at":"2026-05-18T00:33:26.698387+00:00"},{"alias_kind":"pith_short_12","alias_value":"X2GVCSCXAQRP","created_at":"2026-05-18T12:26:17.028572+00:00"},{"alias_kind":"pith_short_16","alias_value":"X2GVCSCXAQRPNLQ6","created_at":"2026-05-18T12:26:17.028572+00:00"},{"alias_kind":"pith_short_8","alias_value":"X2GVCSCX","created_at":"2026-05-18T12:26:17.028572+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/X2GVCSCXAQRPNLQ6VIIEQPENLC","json":"https://pith.science/pith/X2GVCSCXAQRPNLQ6VIIEQPENLC.json","graph_json":"https://pith.science/api/pith-number/X2GVCSCXAQRPNLQ6VIIEQPENLC/graph.json","events_json":"https://pith.science/api/pith-number/X2GVCSCXAQRPNLQ6VIIEQPENLC/events.json","paper":"https://pith.science/paper/X2GVCSCX"},"agent_actions":{"view_html":"https://pith.science/pith/X2GVCSCXAQRPNLQ6VIIEQPENLC","download_json":"https://pith.science/pith/X2GVCSCXAQRPNLQ6VIIEQPENLC.json","view_paper":"https://pith.science/paper/X2GVCSCX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1001.1864&json=true","fetch_graph":"https://pith.science/api/pith-number/X2GVCSCXAQRPNLQ6VIIEQPENLC/graph.json","fetch_events":"https://pith.science/api/pith-number/X2GVCSCXAQRPNLQ6VIIEQPENLC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/X2GVCSCXAQRPNLQ6VIIEQPENLC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/X2GVCSCXAQRPNLQ6VIIEQPENLC/action/storage_attestation","attest_author":"https://pith.science/pith/X2GVCSCXAQRPNLQ6VIIEQPENLC/action/author_attestation","sign_citation":"https://pith.science/pith/X2GVCSCXAQRPNLQ6VIIEQPENLC/action/citation_signature","submit_replication":"https://pith.science/pith/X2GVCSCXAQRPNLQ6VIIEQPENLC/action/replication_record"}},"created_at":"2026-05-18T00:33:26.698387+00:00","updated_at":"2026-05-18T00:33:26.698387+00:00"}