{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:PGMOS5O2CQ2NVV4KYV7CQFVX5L","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":"f6eaff900177e54b2158dd33cf10e72a431e46438c3c0d2aa05bd2757423ad31","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-18T20:43:50Z","title_canon_sha256":"85853c1c505e2b4c446b4eea7a32854977ecca09a98fec105ccfc6373acad676"},"schema_version":"1.0","source":{"id":"1906.07804","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.07804","created_at":"2026-05-17T23:42:57Z"},{"alias_kind":"arxiv_version","alias_value":"1906.07804v1","created_at":"2026-05-17T23:42:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.07804","created_at":"2026-05-17T23:42:57Z"},{"alias_kind":"pith_short_12","alias_value":"PGMOS5O2CQ2N","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"PGMOS5O2CQ2NVV4K","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"PGMOS5O2","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:95bec1883ad3107a59d8c791596ab99e1877fef4e94300750daa610230420290","target":"graph","created_at":"2026-05-17T23:42:57Z","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 present two chemical evolution models of our galaxy, both models are built to fit the O/H ratios derived from H II regions, using two different methods. One model is based on abundances obtained from the [O III] 4363/5007 temperatures (direct method, DM) and the other on abundances obtained from the recombination line ratios of [O II/H I] (temperature independent method, TIM). The differences between the O/H values obtained from these two methods are about 0.25 dex. We find that the model based on the TIM values produces an excellent fit to the observational stellar constraints (B-stars, Ce","authors_text":"A. Peimbert, L. Carigi, M. Peimbert","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-18T20:43:50Z","title":"Chemical evolution models for the Galactic disk based on H II region abundances derived from a direct method and a temperature independent method"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.07804","kind":"arxiv","version":1},"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:af4b05d3d9a6afe3a950a1e7928e6cffbdab03b5b801b895ccc841671d4f0b81","target":"record","created_at":"2026-05-17T23:42:57Z","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":"f6eaff900177e54b2158dd33cf10e72a431e46438c3c0d2aa05bd2757423ad31","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-18T20:43:50Z","title_canon_sha256":"85853c1c505e2b4c446b4eea7a32854977ecca09a98fec105ccfc6373acad676"},"schema_version":"1.0","source":{"id":"1906.07804","kind":"arxiv","version":1}},"canonical_sha256":"7998e975da1434dad78ac57e2816b7eacf5004a5721922d36f4982b6b28ca084","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7998e975da1434dad78ac57e2816b7eacf5004a5721922d36f4982b6b28ca084","first_computed_at":"2026-05-17T23:42:57.714227Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:57.714227Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eGNU+FQ9M8mlTqmO97HI+r5P93PNU5/jsETdaMnU3ZcsPdgtJBLMq+27VK1jhnmIgtMAoDBNx2EZc8NH2HS6DQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:57.715005Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.07804","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:af4b05d3d9a6afe3a950a1e7928e6cffbdab03b5b801b895ccc841671d4f0b81","sha256:95bec1883ad3107a59d8c791596ab99e1877fef4e94300750daa610230420290"],"state_sha256":"8ba214bd01ce6c4e8e4e0a1dc593fd43d952f2c0c98b42914b171a3ee9a26910"}