{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:F77KSRKR7NZNHA6B5ECC5ZUZFT","short_pith_number":"pith:F77KSRKR","schema_version":"1.0","canonical_sha256":"2ffea94551fb72d383c1e9042ee6992ccf5b132bca8f09c9524444937c6e0981","source":{"kind":"arxiv","id":"1409.6320","version":1},"attestation_state":"computed","paper":{"title":"Lyman Alpha and MgII as Probes of Galaxies and their Environments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Glenn G. Kacprzak, Luke A. Barnes, Thibault Garel","submitted_at":"2014-09-22T20:00:21Z","abstract_excerpt":"Ly{\\alpha} emission, Ly{\\alpha} absorption and MgII absorption are powerful tracers of neutral hydrogen. Hydrogen is the most abundant element in the universe and plays a central role in galaxy formation via gas accretion and outflows, as well as being the precursor to molecular clouds, the sites of star formation. Since 21cm emission from neutral hydrogen can only be directly observed in the local universe, we rely on Ly{\\alpha} emission, and Ly{\\alpha} and MgII absorption to probe the physics that drives galaxy evolution at higher redshifts. Furthermore, these tracers are sensitive to a rang"},"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":"1409.6320","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-09-22T20:00:21Z","cross_cats_sorted":[],"title_canon_sha256":"6a56465e8e1721fff5d808da0b97521e87b1ffa31d7d8b1c9fc5bc161d250b1e","abstract_canon_sha256":"47accd7bf740ea3dc0ad2dccbed36f33e7b2bf7764c60b5c51fae54291111356"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:58.973467Z","signature_b64":"6sx8KMhkTadD9yaoqJ3QPbYLHm0cBRxro7LwKmQzxW9KryGog31nVekfeSwVcEUJWK9q5herXLhmvryt4amKBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2ffea94551fb72d383c1e9042ee6992ccf5b132bca8f09c9524444937c6e0981","last_reissued_at":"2026-05-18T01:41:58.972900Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:58.972900Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Lyman Alpha and MgII as Probes of Galaxies and their Environments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Glenn G. Kacprzak, Luke A. Barnes, Thibault Garel","submitted_at":"2014-09-22T20:00:21Z","abstract_excerpt":"Ly{\\alpha} emission, Ly{\\alpha} absorption and MgII absorption are powerful tracers of neutral hydrogen. Hydrogen is the most abundant element in the universe and plays a central role in galaxy formation via gas accretion and outflows, as well as being the precursor to molecular clouds, the sites of star formation. Since 21cm emission from neutral hydrogen can only be directly observed in the local universe, we rely on Ly{\\alpha} emission, and Ly{\\alpha} and MgII absorption to probe the physics that drives galaxy evolution at higher redshifts. Furthermore, these tracers are sensitive to a rang"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.6320","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":"1409.6320","created_at":"2026-05-18T01:41:58.972980+00:00"},{"alias_kind":"arxiv_version","alias_value":"1409.6320v1","created_at":"2026-05-18T01:41:58.972980+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.6320","created_at":"2026-05-18T01:41:58.972980+00:00"},{"alias_kind":"pith_short_12","alias_value":"F77KSRKR7NZN","created_at":"2026-05-18T12:28:28.263976+00:00"},{"alias_kind":"pith_short_16","alias_value":"F77KSRKR7NZNHA6B","created_at":"2026-05-18T12:28:28.263976+00:00"},{"alias_kind":"pith_short_8","alias_value":"F77KSRKR","created_at":"2026-05-18T12:28:28.263976+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/F77KSRKR7NZNHA6B5ECC5ZUZFT","json":"https://pith.science/pith/F77KSRKR7NZNHA6B5ECC5ZUZFT.json","graph_json":"https://pith.science/api/pith-number/F77KSRKR7NZNHA6B5ECC5ZUZFT/graph.json","events_json":"https://pith.science/api/pith-number/F77KSRKR7NZNHA6B5ECC5ZUZFT/events.json","paper":"https://pith.science/paper/F77KSRKR"},"agent_actions":{"view_html":"https://pith.science/pith/F77KSRKR7NZNHA6B5ECC5ZUZFT","download_json":"https://pith.science/pith/F77KSRKR7NZNHA6B5ECC5ZUZFT.json","view_paper":"https://pith.science/paper/F77KSRKR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1409.6320&json=true","fetch_graph":"https://pith.science/api/pith-number/F77KSRKR7NZNHA6B5ECC5ZUZFT/graph.json","fetch_events":"https://pith.science/api/pith-number/F77KSRKR7NZNHA6B5ECC5ZUZFT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/F77KSRKR7NZNHA6B5ECC5ZUZFT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/F77KSRKR7NZNHA6B5ECC5ZUZFT/action/storage_attestation","attest_author":"https://pith.science/pith/F77KSRKR7NZNHA6B5ECC5ZUZFT/action/author_attestation","sign_citation":"https://pith.science/pith/F77KSRKR7NZNHA6B5ECC5ZUZFT/action/citation_signature","submit_replication":"https://pith.science/pith/F77KSRKR7NZNHA6B5ECC5ZUZFT/action/replication_record"}},"created_at":"2026-05-18T01:41:58.972980+00:00","updated_at":"2026-05-18T01:41:58.972980+00:00"}