{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1999:4V4KSNANCTS2NVCCAW4VMXCCP2","short_pith_number":"pith:4V4KSNAN","schema_version":"1.0","canonical_sha256":"e578a9340d14e5a6d44205b9565c427ea9741293bc52e5a512f45d5559d07db7","source":{"kind":"arxiv","id":"astro-ph/9905260","version":2},"attestation_state":"computed","paper":{"title":"Metal Enrichment in the Early Galactic Halo","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C. Ikuta, N. Arimoto (Institute of Astronomy, U. of Tokyo)","submitted_at":"1999-05-20T06:44:18Z","abstract_excerpt":"An early history of metal enrichment in the Galactic halo is studied. We investigate chemical inhomogeneity by using a stochastic chemical evolution model. The model confronts with metallicity distribution function of long-lived halo stars which is found to be a clue to obtain the best model prescriptions. We find that the star formation in the halo virtually terminated by around 1 Gyr and that the halo has never been chemically homogeneous in its star formation history. This conclusion does not depend whether mass loss from the halo is taken into account or not. Observed ratios of alpha-eleme"},"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":"astro-ph/9905260","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-05-20T06:44:18Z","cross_cats_sorted":[],"title_canon_sha256":"0768ca8f11f31c26536c9eedb1c2b76a172001b58de6f20ae60cd8112839d810","abstract_canon_sha256":"e9347f359e8bd58aef759959be6baf432260b9c935252ca2a421f622de1881dd"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:13.125984Z","signature_b64":"DUUXVEwuqRwtI/xac63BVwVXMc2+op8ExkcUfJJ2U8TORq+UXO3HE14RO5e6StP2RzpJLkakTaixoGrMZZcjDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e578a9340d14e5a6d44205b9565c427ea9741293bc52e5a512f45d5559d07db7","last_reissued_at":"2026-05-18T01:40:13.125289Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:13.125289Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Metal Enrichment in the Early Galactic Halo","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C. Ikuta, N. Arimoto (Institute of Astronomy, U. of Tokyo)","submitted_at":"1999-05-20T06:44:18Z","abstract_excerpt":"An early history of metal enrichment in the Galactic halo is studied. We investigate chemical inhomogeneity by using a stochastic chemical evolution model. The model confronts with metallicity distribution function of long-lived halo stars which is found to be a clue to obtain the best model prescriptions. We find that the star formation in the halo virtually terminated by around 1 Gyr and that the halo has never been chemically homogeneous in its star formation history. This conclusion does not depend whether mass loss from the halo is taken into account or not. Observed ratios of alpha-eleme"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9905260","kind":"arxiv","version":2},"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":"astro-ph/9905260","created_at":"2026-05-18T01:40:13.125404+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9905260v2","created_at":"2026-05-18T01:40:13.125404+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9905260","created_at":"2026-05-18T01:40:13.125404+00:00"},{"alias_kind":"pith_short_12","alias_value":"4V4KSNANCTS2","created_at":"2026-05-18T12:25:49.038998+00:00"},{"alias_kind":"pith_short_16","alias_value":"4V4KSNANCTS2NVCC","created_at":"2026-05-18T12:25:49.038998+00:00"},{"alias_kind":"pith_short_8","alias_value":"4V4KSNAN","created_at":"2026-05-18T12:25:49.038998+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/4V4KSNANCTS2NVCCAW4VMXCCP2","json":"https://pith.science/pith/4V4KSNANCTS2NVCCAW4VMXCCP2.json","graph_json":"https://pith.science/api/pith-number/4V4KSNANCTS2NVCCAW4VMXCCP2/graph.json","events_json":"https://pith.science/api/pith-number/4V4KSNANCTS2NVCCAW4VMXCCP2/events.json","paper":"https://pith.science/paper/4V4KSNAN"},"agent_actions":{"view_html":"https://pith.science/pith/4V4KSNANCTS2NVCCAW4VMXCCP2","download_json":"https://pith.science/pith/4V4KSNANCTS2NVCCAW4VMXCCP2.json","view_paper":"https://pith.science/paper/4V4KSNAN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/9905260&json=true","fetch_graph":"https://pith.science/api/pith-number/4V4KSNANCTS2NVCCAW4VMXCCP2/graph.json","fetch_events":"https://pith.science/api/pith-number/4V4KSNANCTS2NVCCAW4VMXCCP2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4V4KSNANCTS2NVCCAW4VMXCCP2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4V4KSNANCTS2NVCCAW4VMXCCP2/action/storage_attestation","attest_author":"https://pith.science/pith/4V4KSNANCTS2NVCCAW4VMXCCP2/action/author_attestation","sign_citation":"https://pith.science/pith/4V4KSNANCTS2NVCCAW4VMXCCP2/action/citation_signature","submit_replication":"https://pith.science/pith/4V4KSNANCTS2NVCCAW4VMXCCP2/action/replication_record"}},"created_at":"2026-05-18T01:40:13.125404+00:00","updated_at":"2026-05-18T01:40:13.125404+00:00"}