{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:BVFIPBJNM5BTAPKUHPOB3EQAR7","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":"53671eebe30695da04dece7cdb65034a4b6a185d86bed15a081b964ac0cfa115","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-10T16:33:29Z","title_canon_sha256":"286f2194cc468e21baad3317d855ea1fbf50ecde5d60e86e97286df34a7a8c0e"},"schema_version":"1.0","source":{"id":"1304.3020","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.3020","created_at":"2026-05-18T01:50:40Z"},{"alias_kind":"arxiv_version","alias_value":"1304.3020v3","created_at":"2026-05-18T01:50:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.3020","created_at":"2026-05-18T01:50:40Z"},{"alias_kind":"pith_short_12","alias_value":"BVFIPBJNM5BT","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"BVFIPBJNM5BTAPKU","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"BVFIPBJN","created_at":"2026-05-18T12:27:40Z"}],"graph_snapshots":[{"event_id":"sha256:0bd527103f9b656059fac66364f63631af6d0bc2699617d11f412ad97a340fd6","target":"graph","created_at":"2026-05-18T01:50:40Z","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 examine the role of energy feedback in shaping the distribution of metals within cosmological hydrodynamical simulations of L* disc galaxies. While negative abundance gradients today provide a boundary condition for galaxy evolution models, in support of inside-out disc growth, empirical evidence as to whether abundance gradients steepen or flatten with time remains highly contradictory. We made use of a suite of L* discs, realised with and without `enhanced' feedback. All the simulations were produced using the smoothed particle hydrodynamics code Gasoline, and their in situ gas-phase meta","authors_text":"B.K. Gibson, C.B. Brook, G.S. Stinson, J. Bailin, K. Pilkington","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-10T16:33:29Z","title":"Constraining Sub-Grid Physics with High-Redshift Spatially-Resolved Metallicity Distributions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.3020","kind":"arxiv","version":3},"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":"sha256:94279136afc9710bd4ee567b81726b615dfb63ee59eeeda03722f42b5e845bd8","target":"record","created_at":"2026-05-18T01:50:40Z","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":"53671eebe30695da04dece7cdb65034a4b6a185d86bed15a081b964ac0cfa115","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-10T16:33:29Z","title_canon_sha256":"286f2194cc468e21baad3317d855ea1fbf50ecde5d60e86e97286df34a7a8c0e"},"schema_version":"1.0","source":{"id":"1304.3020","kind":"arxiv","version":3}},"canonical_sha256":"0d4a87852d6743303d543bdc1d92008fd13b8e2267708849e3cb0022124b089c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0d4a87852d6743303d543bdc1d92008fd13b8e2267708849e3cb0022124b089c","first_computed_at":"2026-05-18T01:50:40.330009Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:50:40.330009Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/hh9A2kqEBCvHg7ImcojtkIqk4g1q5U1uMAmKPl71IC+vYGrFUClYD2cuDxtnSD1PTwhBI6LUk6mWF+3ZtYKCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:50:40.330719Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.3020","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:94279136afc9710bd4ee567b81726b615dfb63ee59eeeda03722f42b5e845bd8","sha256:0bd527103f9b656059fac66364f63631af6d0bc2699617d11f412ad97a340fd6"],"state_sha256":"a90702d8507b23b11d38de3fd381e655d05d73bcc3d0bc8754c8092a9fbbc4ce"}