{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:XMRYKJR5VGHKPFIR3EBVQ3OOSF","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":"ee2b0b71219770d769ae6db04ffe196bcbd2104390d3ee71cc9644772f7cb1b1","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-12-02T05:57:03Z","title_canon_sha256":"bce7b0c3151a030bf8267708b14d406b01ec5b87f4aba01e6cf0d49fdc82abca"},"schema_version":"1.0","source":{"id":"2412.01157","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2412.01157","created_at":"2026-07-05T10:55:27Z"},{"alias_kind":"arxiv_version","alias_value":"2412.01157v2","created_at":"2026-07-05T10:55:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2412.01157","created_at":"2026-07-05T10:55:27Z"},{"alias_kind":"pith_short_12","alias_value":"XMRYKJR5VGHK","created_at":"2026-07-05T10:55:27Z"},{"alias_kind":"pith_short_16","alias_value":"XMRYKJR5VGHKPFIR","created_at":"2026-07-05T10:55:27Z"},{"alias_kind":"pith_short_8","alias_value":"XMRYKJR5","created_at":"2026-07-05T10:55:27Z"}],"graph_snapshots":[{"event_id":"sha256:b00cfdec83ea58bf0a35d6cfdbe6ef018323786dacb20ceab143a0865b9acc5a","target":"graph","created_at":"2026-07-05T10:55:27Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2412.01157/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Radial metallicity gradients are fundamental to understanding galaxy formation and evolution. In our high-resolution simulation of a NIHAO-UHD Milky Way analogue, we analyze the linearity, scatter, spatial coherence, and age-related variations of metallicity gradients using young stars and gas. While a global linear model generally captures the gradient, it ever so slightly overestimates metallicity in the inner galaxy and underestimates it in the outer regions of our simulated galaxy. Both a quadratic model, showing an initially steeper gradient that smoothly flattens outward, and a piecewise","authors_text":"Kathryn Grasha, Qian-Hui Chen, Sven Buder, Tobias Buck","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-12-02T05:57:03Z","title":"Local variations of the radial metallicity gradient in a simulated NIHAO-UHD Milky Way analogue and their implications for (extra-)galactic studies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2412.01157","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":"sha256:4bfbbdeea09846d4ee8801e3b7d015010af9ad655151551096ec8ff07754b330","target":"record","created_at":"2026-07-05T10:55:27Z","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":"ee2b0b71219770d769ae6db04ffe196bcbd2104390d3ee71cc9644772f7cb1b1","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-12-02T05:57:03Z","title_canon_sha256":"bce7b0c3151a030bf8267708b14d406b01ec5b87f4aba01e6cf0d49fdc82abca"},"schema_version":"1.0","source":{"id":"2412.01157","kind":"arxiv","version":2}},"canonical_sha256":"bb2385263da98ea79511d903586dce9173f6ad149dcbe47cde837e6fde3878e7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bb2385263da98ea79511d903586dce9173f6ad149dcbe47cde837e6fde3878e7","first_computed_at":"2026-07-05T10:55:27.178305Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:55:27.178305Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KRtwqz+uXFJFO9zSteZDZdGW6G1/w7Mxc720mUaWdJ3bd+Ff/4dHOrePZmBDukCMPQmWK/wIEtqxcN8klSZvBA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:55:27.178968Z","signed_message":"canonical_sha256_bytes"},"source_id":"2412.01157","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4bfbbdeea09846d4ee8801e3b7d015010af9ad655151551096ec8ff07754b330","sha256:b00cfdec83ea58bf0a35d6cfdbe6ef018323786dacb20ceab143a0865b9acc5a"],"state_sha256":"cc6a606c32d299e00db75d1c28fc50ae9920849d4bcfad026f83d571e4bd80fc"}