{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:BVFIPBJNM5BTAPKUHPOB3EQAR7","short_pith_number":"pith:BVFIPBJN","canonical_record":{"source":{"id":"1304.3020","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-10T16:33:29Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"286f2194cc468e21baad3317d855ea1fbf50ecde5d60e86e97286df34a7a8c0e","abstract_canon_sha256":"53671eebe30695da04dece7cdb65034a4b6a185d86bed15a081b964ac0cfa115"},"schema_version":"1.0"},"canonical_sha256":"0d4a87852d6743303d543bdc1d92008fd13b8e2267708849e3cb0022124b089c","source":{"kind":"arxiv","id":"1304.3020","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"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:BVFIPBJNM5BTAPKUHPOB3EQAR7","target":"record","payload":{"canonical_record":{"source":{"id":"1304.3020","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-04-10T16:33:29Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"286f2194cc468e21baad3317d855ea1fbf50ecde5d60e86e97286df34a7a8c0e","abstract_canon_sha256":"53671eebe30695da04dece7cdb65034a4b6a185d86bed15a081b964ac0cfa115"},"schema_version":"1.0"},"canonical_sha256":"0d4a87852d6743303d543bdc1d92008fd13b8e2267708849e3cb0022124b089c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:50:40.330719Z","signature_b64":"/hh9A2kqEBCvHg7ImcojtkIqk4g1q5U1uMAmKPl71IC+vYGrFUClYD2cuDxtnSD1PTwhBI6LUk6mWF+3ZtYKCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0d4a87852d6743303d543bdc1d92008fd13b8e2267708849e3cb0022124b089c","last_reissued_at":"2026-05-18T01:50:40.330009Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:50:40.330009Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1304.3020","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:50:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Rw0vNlArFLzRhnbPhbJwDP8xVxjU0ZMejKTwfxmHA1Itrg6bJJf0cWiCtxeZed565zvKrsNa8Zug9lwwa/V5Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T08:41:43.399178Z"},"content_sha256":"94279136afc9710bd4ee567b81726b615dfb63ee59eeeda03722f42b5e845bd8","schema_version":"1.0","event_id":"sha256:94279136afc9710bd4ee567b81726b615dfb63ee59eeeda03722f42b5e845bd8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:BVFIPBJNM5BTAPKUHPOB3EQAR7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraining Sub-Grid Physics with High-Redshift Spatially-Resolved Metallicity Distributions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"B.K. Gibson, C.B. Brook, G.S. Stinson, J. Bailin, K. Pilkington","submitted_at":"2013-04-10T16:33:29Z","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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.3020","kind":"arxiv","version":3},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:50:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NVL3O+etqriO1xTHM/7fpvs9yTJI4YG+1vAGqXNqPsFhSxxPwh+q2vcEzKmplUNeiFwJyQ5MbeFGjuhjb2UbDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T08:41:43.399532Z"},"content_sha256":"0bd527103f9b656059fac66364f63631af6d0bc2699617d11f412ad97a340fd6","schema_version":"1.0","event_id":"sha256:0bd527103f9b656059fac66364f63631af6d0bc2699617d11f412ad97a340fd6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BVFIPBJNM5BTAPKUHPOB3EQAR7/bundle.json","state_url":"https://pith.science/pith/BVFIPBJNM5BTAPKUHPOB3EQAR7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BVFIPBJNM5BTAPKUHPOB3EQAR7/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-05T08:41:43Z","links":{"resolver":"https://pith.science/pith/BVFIPBJNM5BTAPKUHPOB3EQAR7","bundle":"https://pith.science/pith/BVFIPBJNM5BTAPKUHPOB3EQAR7/bundle.json","state":"https://pith.science/pith/BVFIPBJNM5BTAPKUHPOB3EQAR7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BVFIPBJNM5BTAPKUHPOB3EQAR7/bundle.json"},"state":{"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"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KLEE0RI0K3sR8eD7awvz+qFHj36ZrewCgkfjjVwAdg5bq/ydksn2Kz/v1v75zzDMpaPf5RPW8r1DCEIGqwh/AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T08:41:43.401304Z","bundle_sha256":"84eb75118a221024eb51adb7c01a6cbe83403534b65a4348db38914f3588eff4"}}