{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:UQ24HHAJERT3T3AY7ASO6F63IQ","short_pith_number":"pith:UQ24HHAJ","schema_version":"1.0","canonical_sha256":"a435c39c092467b9ec18f824ef17db441807ccc491c73e10316604268503c7da","source":{"kind":"arxiv","id":"1304.4385","version":1},"attestation_state":"computed","paper":{"title":"Modelling the chemical evolution of the Galaxy halo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"D. Romano, F. Matteucci, G. Brusadin","submitted_at":"2013-04-16T10:10:03Z","abstract_excerpt":"We study the chemical evolution and formation of the Galactic halo through the analysis of its stellar metallicity distribution function and some key elemental abundance patterns. Starting from the two-infall model for the Galaxy, which predicts too few low-metallicity stars, we add a gas outflow during the halo phase with a rate proportional to the star formation rate through a free parameter, lambda. In addition, we consider a first generation of massive zero-metal stars in this two-infall + outflow model adopting two different top-heavy initial mass functions and specific population III yie"},"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":"1304.4385","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-16T10:10:03Z","cross_cats_sorted":[],"title_canon_sha256":"395f2ece5ee313c1aa60596ad89e6cead90fccf603f5f38318276e90eabc8785","abstract_canon_sha256":"944fcbd93e4eddbf5c2db4da6bd43c36b71585b8a1171ea17ab156d863204c2f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:50:32.316633Z","signature_b64":"OQ0ev5tlE9lsVCJ8z5JqEHYfxyuuXnmD8jqoLeJdIpry61wz3V/l7+2TjtWLAXGyS5PFuF+EN65EGKJqMz5+Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a435c39c092467b9ec18f824ef17db441807ccc491c73e10316604268503c7da","last_reissued_at":"2026-05-18T01:50:32.315981Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:50:32.315981Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Modelling the chemical evolution of the Galaxy halo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"D. Romano, F. Matteucci, G. Brusadin","submitted_at":"2013-04-16T10:10:03Z","abstract_excerpt":"We study the chemical evolution and formation of the Galactic halo through the analysis of its stellar metallicity distribution function and some key elemental abundance patterns. Starting from the two-infall model for the Galaxy, which predicts too few low-metallicity stars, we add a gas outflow during the halo phase with a rate proportional to the star formation rate through a free parameter, lambda. In addition, we consider a first generation of massive zero-metal stars in this two-infall + outflow model adopting two different top-heavy initial mass functions and specific population III yie"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.4385","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":"1304.4385","created_at":"2026-05-18T01:50:32.316080+00:00"},{"alias_kind":"arxiv_version","alias_value":"1304.4385v1","created_at":"2026-05-18T01:50:32.316080+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.4385","created_at":"2026-05-18T01:50:32.316080+00:00"},{"alias_kind":"pith_short_12","alias_value":"UQ24HHAJERT3","created_at":"2026-05-18T12:28:02.375192+00:00"},{"alias_kind":"pith_short_16","alias_value":"UQ24HHAJERT3T3AY","created_at":"2026-05-18T12:28:02.375192+00:00"},{"alias_kind":"pith_short_8","alias_value":"UQ24HHAJ","created_at":"2026-05-18T12:28:02.375192+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/UQ24HHAJERT3T3AY7ASO6F63IQ","json":"https://pith.science/pith/UQ24HHAJERT3T3AY7ASO6F63IQ.json","graph_json":"https://pith.science/api/pith-number/UQ24HHAJERT3T3AY7ASO6F63IQ/graph.json","events_json":"https://pith.science/api/pith-number/UQ24HHAJERT3T3AY7ASO6F63IQ/events.json","paper":"https://pith.science/paper/UQ24HHAJ"},"agent_actions":{"view_html":"https://pith.science/pith/UQ24HHAJERT3T3AY7ASO6F63IQ","download_json":"https://pith.science/pith/UQ24HHAJERT3T3AY7ASO6F63IQ.json","view_paper":"https://pith.science/paper/UQ24HHAJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1304.4385&json=true","fetch_graph":"https://pith.science/api/pith-number/UQ24HHAJERT3T3AY7ASO6F63IQ/graph.json","fetch_events":"https://pith.science/api/pith-number/UQ24HHAJERT3T3AY7ASO6F63IQ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/UQ24HHAJERT3T3AY7ASO6F63IQ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/UQ24HHAJERT3T3AY7ASO6F63IQ/action/storage_attestation","attest_author":"https://pith.science/pith/UQ24HHAJERT3T3AY7ASO6F63IQ/action/author_attestation","sign_citation":"https://pith.science/pith/UQ24HHAJERT3T3AY7ASO6F63IQ/action/citation_signature","submit_replication":"https://pith.science/pith/UQ24HHAJERT3T3AY7ASO6F63IQ/action/replication_record"}},"created_at":"2026-05-18T01:50:32.316080+00:00","updated_at":"2026-05-18T01:50:32.316080+00:00"}