{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:YPCIUV2YOUEF4NI5C2GSRV474H","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":"ff968d920ee7b7212fb3ddfe30666d539a472529dbe1328f45af860d8b0b2e63","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-08-07T07:50:52Z","title_canon_sha256":"686c62467031147b6a927b4c843c1d7f77e6e900d57bdbb064e23f8c1eab594b"},"schema_version":"1.0","source":{"id":"2008.03028","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.03028","created_at":"2026-07-05T02:39:35Z"},{"alias_kind":"arxiv_version","alias_value":"2008.03028v2","created_at":"2026-07-05T02:39:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.03028","created_at":"2026-07-05T02:39:35Z"},{"alias_kind":"pith_short_12","alias_value":"YPCIUV2YOUEF","created_at":"2026-07-05T02:39:35Z"},{"alias_kind":"pith_short_16","alias_value":"YPCIUV2YOUEF4NI5","created_at":"2026-07-05T02:39:35Z"},{"alias_kind":"pith_short_8","alias_value":"YPCIUV2Y","created_at":"2026-07-05T02:39:35Z"}],"graph_snapshots":[{"event_id":"sha256:e45a91863da99452c0edbbaaefd9b7eacbaadbd1df60f6b41f5675b9834d9118","target":"graph","created_at":"2026-07-05T02:39:35Z","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/2008.03028/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"White dwarf stars are the most common end point of stellar evolution. Of special interest are the ultramassive white dwarfs, as they are related to type Ia Supernovae explosions, merger events, and Fast Radio Bursts. Ultramassive white dwarfs are expected to harbour oxygen-neon (ONe) cores as a result of single standard stellar evolution. However, a fraction of them could have carbon-oxygen (CO) cores. Recent studies, based on the new observations provided by the {\\it Gaia} space mission, indicate that a small fraction of the ultramassive white dwarfs experience a strong delay in their cooling","authors_text":"Alberto Rebassa-Mansergas, Alejandro H. C\\'orsico, Leandro G. Althaus, Mar\\'ia E. Camisassa, Pier-Emmanuel Tremblay, Roberto Raddi, Santiago Torres, Sihao Cheng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-08-07T07:50:52Z","title":"Forever young white dwarfs: when stellar ageing stops"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.03028","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":"sha256:85bd31d543e47a728e1083159d28a645d043149c0de4c66705beb8ecaef97c93","target":"record","created_at":"2026-07-05T02:39:35Z","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":"ff968d920ee7b7212fb3ddfe30666d539a472529dbe1328f45af860d8b0b2e63","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-08-07T07:50:52Z","title_canon_sha256":"686c62467031147b6a927b4c843c1d7f77e6e900d57bdbb064e23f8c1eab594b"},"schema_version":"1.0","source":{"id":"2008.03028","kind":"arxiv","version":2}},"canonical_sha256":"c3c48a575875085e351d168d28d79fe1df5dfaf836c1e12dbc07c8933396b238","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c3c48a575875085e351d168d28d79fe1df5dfaf836c1e12dbc07c8933396b238","first_computed_at":"2026-07-05T02:39:35.241114Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:39:35.241114Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tJ6CaEirbYSljccW4ejSLu0sAObYa6o3So08NE9zoKVQQ37tQrw5W8N+krqHQJZQxoPwn38fG+HaupiMBTLlDg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:39:35.241678Z","signed_message":"canonical_sha256_bytes"},"source_id":"2008.03028","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:85bd31d543e47a728e1083159d28a645d043149c0de4c66705beb8ecaef97c93","sha256:e45a91863da99452c0edbbaaefd9b7eacbaadbd1df60f6b41f5675b9834d9118"],"state_sha256":"93a6d2d1e06cc31224f0b44d96979b48f3f9c21c8f3c9b7bc990c7b357b5513c"}