{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:RAD5B56R5IDAPD6SWCZJJQFJFB","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":"cd5d693720f8419d50522c0e9beb999ba16d57068108f561dd03a2989fe9d9c5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-10-05T20:02:31Z","title_canon_sha256":"7115e5a2176703cc1f6bde999b0c14a6aafa30c2176ea991f4e433517a9cf128"},"schema_version":"1.0","source":{"id":"1010.1007","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1010.1007","created_at":"2026-05-18T04:39:49Z"},{"alias_kind":"arxiv_version","alias_value":"1010.1007v2","created_at":"2026-05-18T04:39:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1010.1007","created_at":"2026-05-18T04:39:49Z"},{"alias_kind":"pith_short_12","alias_value":"RAD5B56R5IDA","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"RAD5B56R5IDAPD6S","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"RAD5B56R","created_at":"2026-05-18T12:26:13Z"}],"graph_snapshots":[{"event_id":"sha256:6fd9b3d82f921b3847dc9e9e3c53b12c7eb9dfb3f2b5246a210ec991b358e6c0","target":"graph","created_at":"2026-05-18T04:39:49Z","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 discuss the colour, age and metallicity gradients in a wide sample of local SDSS early- and late-type galaxies. From the fitting of stellar population models we find that metallicity is the main driver of colour gradients and the age in the central regions is a dominant parameter which rules the scatter in both metallicity and age gradients. We find a consistency with independent observations and a set of simulations. From the comparison with simulations and theoretical considerations we are able to depict a general picture of a formation scenario.","authors_text":"C. Tortora, M. Capaccioli, N.R. Napolitano, P. Jetzer, R. Molinaro, V.F. Cardone","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-10-05T20:02:31Z","title":"Colour and stellar population gradients in galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.1007","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":"sha256:95cc4af94c524497006ff0eb531207c221e9818e70a94ba35933ba799e42f462","target":"record","created_at":"2026-05-18T04:39:49Z","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":"cd5d693720f8419d50522c0e9beb999ba16d57068108f561dd03a2989fe9d9c5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-10-05T20:02:31Z","title_canon_sha256":"7115e5a2176703cc1f6bde999b0c14a6aafa30c2176ea991f4e433517a9cf128"},"schema_version":"1.0","source":{"id":"1010.1007","kind":"arxiv","version":2}},"canonical_sha256":"8807d0f7d1ea06078fd2b0b294c0a92868f64918ae295e2562a04f18d80d90cd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8807d0f7d1ea06078fd2b0b294c0a92868f64918ae295e2562a04f18d80d90cd","first_computed_at":"2026-05-18T04:39:49.069423Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:39:49.069423Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/MkLefN8NUnzpI3IZMD6LnN7sqN/7OYc7w75DkBxCwAGuOMipgds6dhuxZkRtD1BZf14cD8iU9NMhRqBIMBMBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:39:49.069942Z","signed_message":"canonical_sha256_bytes"},"source_id":"1010.1007","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:95cc4af94c524497006ff0eb531207c221e9818e70a94ba35933ba799e42f462","sha256:6fd9b3d82f921b3847dc9e9e3c53b12c7eb9dfb3f2b5246a210ec991b358e6c0"],"state_sha256":"0cb1e0ce36a2220829aa76fa8bfc17609c5773542ae90c4a96eccc4152caa380"}