{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:RSPX4RAOMXZPZK3FE54FTOGTEM","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"30c2b0be29cc63a76d53ae2d58905361de276554b574f7b7ed518b51f24acd2a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-24T20:04:32Z","title_canon_sha256":"dba54738fd539fe6f8e140ecbec7ec8ca7eb517f2d18d00188be16dbb2808729"},"schema_version":"1.0","source":{"id":"1303.5987","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.5987","created_at":"2026-05-18T01:50:59Z"},{"alias_kind":"arxiv_version","alias_value":"1303.5987v2","created_at":"2026-05-18T01:50:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.5987","created_at":"2026-05-18T01:50:59Z"},{"alias_kind":"pith_short_12","alias_value":"RSPX4RAOMXZP","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"RSPX4RAOMXZPZK3F","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"RSPX4RAO","created_at":"2026-05-18T12:27:59Z"}],"graph_snapshots":[{"event_id":"sha256:c8b6b76a1a0e9aec0637d11329ab832641980629188c89b0d5ae1a1cbebec4c2","target":"graph","created_at":"2026-05-18T01:50:59Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We calculate the stellar mass-metallicity relation at five epochs ranging to z~2.3. We quantify evolution in the shape of the mass-metallicity relation as a function of redshift; the mass-metallicity relation flattens at late times. There is an empirical upper limit to the gas-phase oxygen abundance in star-forming galaxies that is independent of redshift. From examination of the mass-metallicity relation and its observed scatter we show that the flattening at late times is a consequence of evolution in the stellar mass where galaxies enrich to this empirical upper metallicity limit; there is ","authors_text":"Daniel Fabricant (SAO), H. Jabran Zahid (IfA, Ho Seong Hwang (SAO), Lisa Kewley (ANU), Margaret Geller (SAO), Michael Kurtz (SAO), University of Hawaii)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-24T20:04:32Z","title":"The Chemical Evolution of Star-Forming Galaxies Over the Last 11 Billion Years"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.5987","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:afc83f76db7da317f8e4265ba1f177950902d04576484a5b7b092b2b1da322ff","target":"record","created_at":"2026-05-18T01:50:59Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"30c2b0be29cc63a76d53ae2d58905361de276554b574f7b7ed518b51f24acd2a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-24T20:04:32Z","title_canon_sha256":"dba54738fd539fe6f8e140ecbec7ec8ca7eb517f2d18d00188be16dbb2808729"},"schema_version":"1.0","source":{"id":"1303.5987","kind":"arxiv","version":2}},"canonical_sha256":"8c9f7e440e65f2fcab65277859b8d3232d4c03e443f32bf395a314f28df9a780","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8c9f7e440e65f2fcab65277859b8d3232d4c03e443f32bf395a314f28df9a780","first_computed_at":"2026-05-18T01:50:59.211224Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:50:59.211224Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0xDtB6Sg5JMFUNoKdH4l4bBaA65KD8ny3ER4FuScERJb2U/t/TmEqaYkjxaoe05BXD2FF+A4DA/e6wCr2BqEDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:50:59.211730Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.5987","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:afc83f76db7da317f8e4265ba1f177950902d04576484a5b7b092b2b1da322ff","sha256:c8b6b76a1a0e9aec0637d11329ab832641980629188c89b0d5ae1a1cbebec4c2"],"state_sha256":"7bb7f249c845e96e40ac9007ee89fccba32ed030cbf225adb1930312734dff22"}