{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:7GNC3D5IDIZHOJLL3XKIPOB6FV","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":"f38c79a4a61ae284086376feb288120c1088752e2e3f1c31f43246a9980988d8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-07-01T18:36:30Z","title_canon_sha256":"37e5c0cd873029edf961b315c5a300f92ee94a04d8b4629fb9dee2e2bc33891a"},"schema_version":"1.0","source":{"id":"1607.00344","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.00344","created_at":"2026-05-18T01:05:42Z"},{"alias_kind":"arxiv_version","alias_value":"1607.00344v1","created_at":"2026-05-18T01:05:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.00344","created_at":"2026-05-18T01:05:42Z"},{"alias_kind":"pith_short_12","alias_value":"7GNC3D5IDIZH","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7GNC3D5IDIZHOJLL","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7GNC3D5I","created_at":"2026-05-18T12:30:04Z"}],"graph_snapshots":[{"event_id":"sha256:fd2c97a7223498703b989c2491e5384410a0888d1bc12cc7223c300d62b9a10e","target":"graph","created_at":"2026-05-18T01:05:42Z","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":"For sufficiently wide orbital separations {\\it a}, the two members of a stellar binary evolve independently. This implies that in a wide double white dwarf (DWD), the more massive WD should always be produced first, when its more massive progenitor ends its main-sequence life, and should therefore be older and cooler than its companion. The bound, wide DWD HS 2220$+$2146 ($a\\approx500$ AU) does not conform to this picture: the more massive WD is the younger, hotter of the pair. We show that this discrepancy is unlikely to be due to past mass-transfer phases or to the presence of an unresolved ","authors_text":"A. Gianninas, Detlev Koester, Jeff J. Andrews, Marcel Ag\\\"ueros, Mukremin Kilic, Natalie M. Gosnell, Warren R. Brown","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-07-01T18:36:30Z","title":"Today a Duo, But Once a Trio? The Double White Dwarf HS 2220$+$2146 May Be A Post-Blue Straggler Binary"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.00344","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":"sha256:735d68bec50ad7709e662509e96f0d7863385f6fcaa6a99ddd4c6b8ceae5d0df","target":"record","created_at":"2026-05-18T01:05:42Z","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":"f38c79a4a61ae284086376feb288120c1088752e2e3f1c31f43246a9980988d8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-07-01T18:36:30Z","title_canon_sha256":"37e5c0cd873029edf961b315c5a300f92ee94a04d8b4629fb9dee2e2bc33891a"},"schema_version":"1.0","source":{"id":"1607.00344","kind":"arxiv","version":1}},"canonical_sha256":"f99a2d8fa81a3277256bddd487b83e2d5a2e47f4a0f8198f23c44d5df58faf04","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f99a2d8fa81a3277256bddd487b83e2d5a2e47f4a0f8198f23c44d5df58faf04","first_computed_at":"2026-05-18T01:05:42.554206Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:05:42.554206Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gZpFhaspIdsg5g/YCG1gSBkCI3OfHJ/Y018rbFpGcRd9XV9KphNJk7bBfFMRdxNJU9EH5c3y8wt5agxGLoGZCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:05:42.554831Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.00344","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:735d68bec50ad7709e662509e96f0d7863385f6fcaa6a99ddd4c6b8ceae5d0df","sha256:fd2c97a7223498703b989c2491e5384410a0888d1bc12cc7223c300d62b9a10e"],"state_sha256":"512168b698930fc46d224547ffadb5f338f0b65d2fd940eb58b794e71d77db86"}