{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:PPAMC4EQAASB3SQOTOQALMD5TS","short_pith_number":"pith:PPAMC4EQ","schema_version":"1.0","canonical_sha256":"7bc0c1709000241dca0e9ba005b07d9c953a21e48482666355cfcec318bf082a","source":{"kind":"arxiv","id":"1811.02589","version":2},"attestation_state":"computed","paper":{"title":"Spatially Resolved Metal Loss from M31","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Benjamin F. Williams, Jessica K. Werk, Julianne J. Dalcanton, O. Grace Telford","submitted_at":"2018-11-06T19:00:31Z","abstract_excerpt":"As galaxies evolve, they must enrich and exchange gas with the surrounding medium, but the timing of these processes and how much gas is involved remain poorly understood. In this work, we leverage metals as tracers of past gas flows to constrain the history of metal ejection and redistribution in M31. This roughly $L*$ galaxy is a unique case where spatially resolved measurements of the gas-phase and stellar metallicity, dust extinction, and neutral ISM gas content are all available, enabling a census of the present metal mass. We combine spatially resolved star formation histories from the P"},"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":"1811.02589","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-06T19:00:31Z","cross_cats_sorted":[],"title_canon_sha256":"e7f6f28c6e35ab58f576e51b04ea61165c68828bfd76b76c46c1002c092c4719","abstract_canon_sha256":"cbc920d958b3c43663a0b5a91a99f046b10a73605b26cba494c84281e27db210"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:37.809281Z","signature_b64":"rsNzigmjczXqShrlajhpYA5PnFYgMxIWZpDzu1T02B+59PRpFWNY6wCHehVxFw6j22Pl/HLnj9YpoPOhINBBBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7bc0c1709000241dca0e9ba005b07d9c953a21e48482666355cfcec318bf082a","last_reissued_at":"2026-05-17T23:43:37.808485Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:37.808485Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Spatially Resolved Metal Loss from M31","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Benjamin F. Williams, Jessica K. Werk, Julianne J. Dalcanton, O. Grace Telford","submitted_at":"2018-11-06T19:00:31Z","abstract_excerpt":"As galaxies evolve, they must enrich and exchange gas with the surrounding medium, but the timing of these processes and how much gas is involved remain poorly understood. In this work, we leverage metals as tracers of past gas flows to constrain the history of metal ejection and redistribution in M31. This roughly $L*$ galaxy is a unique case where spatially resolved measurements of the gas-phase and stellar metallicity, dust extinction, and neutral ISM gas content are all available, enabling a census of the present metal mass. We combine spatially resolved star formation histories from the P"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.02589","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":"1811.02589","created_at":"2026-05-17T23:43:37.808616+00:00"},{"alias_kind":"arxiv_version","alias_value":"1811.02589v2","created_at":"2026-05-17T23:43:37.808616+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.02589","created_at":"2026-05-17T23:43:37.808616+00:00"},{"alias_kind":"pith_short_12","alias_value":"PPAMC4EQAASB","created_at":"2026-05-18T12:32:46.962924+00:00"},{"alias_kind":"pith_short_16","alias_value":"PPAMC4EQAASB3SQO","created_at":"2026-05-18T12:32:46.962924+00:00"},{"alias_kind":"pith_short_8","alias_value":"PPAMC4EQ","created_at":"2026-05-18T12:32:46.962924+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/PPAMC4EQAASB3SQOTOQALMD5TS","json":"https://pith.science/pith/PPAMC4EQAASB3SQOTOQALMD5TS.json","graph_json":"https://pith.science/api/pith-number/PPAMC4EQAASB3SQOTOQALMD5TS/graph.json","events_json":"https://pith.science/api/pith-number/PPAMC4EQAASB3SQOTOQALMD5TS/events.json","paper":"https://pith.science/paper/PPAMC4EQ"},"agent_actions":{"view_html":"https://pith.science/pith/PPAMC4EQAASB3SQOTOQALMD5TS","download_json":"https://pith.science/pith/PPAMC4EQAASB3SQOTOQALMD5TS.json","view_paper":"https://pith.science/paper/PPAMC4EQ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1811.02589&json=true","fetch_graph":"https://pith.science/api/pith-number/PPAMC4EQAASB3SQOTOQALMD5TS/graph.json","fetch_events":"https://pith.science/api/pith-number/PPAMC4EQAASB3SQOTOQALMD5TS/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/PPAMC4EQAASB3SQOTOQALMD5TS/action/timestamp_anchor","attest_storage":"https://pith.science/pith/PPAMC4EQAASB3SQOTOQALMD5TS/action/storage_attestation","attest_author":"https://pith.science/pith/PPAMC4EQAASB3SQOTOQALMD5TS/action/author_attestation","sign_citation":"https://pith.science/pith/PPAMC4EQAASB3SQOTOQALMD5TS/action/citation_signature","submit_replication":"https://pith.science/pith/PPAMC4EQAASB3SQOTOQALMD5TS/action/replication_record"}},"created_at":"2026-05-17T23:43:37.808616+00:00","updated_at":"2026-05-17T23:43:37.808616+00:00"}