{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:U6S4BN2RMVDGILRO7VAIIH5ZFL","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":"b7ec5366b09f11ec71b258b627d63038a9c28a314c4b897fb7744d30b61db7e1","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-06-25T11:40:22Z","title_canon_sha256":"9da4fe9aff8045f21d520a622702b76c88e0f10a4f0ba1d595867c2cfbb24773"},"schema_version":"1.0","source":{"id":"astro-ph/9806336","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9806336","created_at":"2026-07-04T16:06:48Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9806336v2","created_at":"2026-07-04T16:06:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9806336","created_at":"2026-07-04T16:06:48Z"},{"alias_kind":"pith_short_12","alias_value":"U6S4BN2RMVDG","created_at":"2026-07-04T16:06:48Z"},{"alias_kind":"pith_short_16","alias_value":"U6S4BN2RMVDGILRO","created_at":"2026-07-04T16:06:48Z"},{"alias_kind":"pith_short_8","alias_value":"U6S4BN2R","created_at":"2026-07-04T16:06:48Z"}],"graph_snapshots":[{"event_id":"sha256:76ce15441ea9d8c10bd9d812d8e13d5e9c054f822b47e4630d55d45f67faa039","target":"graph","created_at":"2026-07-04T16:06:48Z","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/astro-ph/9806336/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Recent observations have revealed that Type Ia supernovae (SNe Ia) are not perfect standard candles but show some variations in their absolute magnitudes, light curve shapes, and spectra. The C/O ratio in the SNe Ia progenitors (C-O white dwarfs) may be related to this variation. In this work, we systematically investigate the effects of stellar mass (M) and metallicity (Z) on the C/O ratio and its distribution in the C-O white dwarfs by calculating stellar evolution from the main-sequence through the end of the second dredge-up for M=3-9 Mo and Z=0.001-0.03. We find that the total carbon mass","authors_text":"(2) Kyushu University, (3)National Astronomical Observatory), Hideyuki Umeda (1), Hitoshi Yamaoka (2), Ken'ichi Nomoto (1), Shinya Wanajo (3) ((1) Research Center for the Early Universe, University of Tokyo","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1998-06-25T11:40:22Z","title":"Evolution of 3-9 Mo Stars for Z=0.001 - 0.03 and Metallicity Effects on Type Ia Supernovae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9806336","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:ed1e765d66f22cbe1beb5a8a0c792228fb5a1d44f990514b926e54a735880995","target":"record","created_at":"2026-07-04T16:06:48Z","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":"b7ec5366b09f11ec71b258b627d63038a9c28a314c4b897fb7744d30b61db7e1","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-06-25T11:40:22Z","title_canon_sha256":"9da4fe9aff8045f21d520a622702b76c88e0f10a4f0ba1d595867c2cfbb24773"},"schema_version":"1.0","source":{"id":"astro-ph/9806336","kind":"arxiv","version":2}},"canonical_sha256":"a7a5c0b7516546642e2efd40841fb92ae97e8b8d943b3f58d9cdd8cfc9aee879","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a7a5c0b7516546642e2efd40841fb92ae97e8b8d943b3f58d9cdd8cfc9aee879","first_computed_at":"2026-07-04T16:06:48.151215Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:06:48.151215Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nm0cvuNeBplHoQdrEDWzOohFKhmKm0PYeFnwZJwRJAJJeZSW66iuRebA8l4aNQ5yrrIcHs/8bzD3G95f3KIRAA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:06:48.151726Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9806336","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ed1e765d66f22cbe1beb5a8a0c792228fb5a1d44f990514b926e54a735880995","sha256:76ce15441ea9d8c10bd9d812d8e13d5e9c054f822b47e4630d55d45f67faa039"],"state_sha256":"843a8d724d074f5ad54f0a0fdb43cd592a4b355425e9bcb413936fbaf399a399"}