{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:DHWYQEYCMBQWHMKEZTDFW6TCSX","short_pith_number":"pith:DHWYQEYC","canonical_record":{"source":{"id":"2107.07094","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-07-15T03:11:10Z","cross_cats_sorted":["physics.plasm-ph"],"title_canon_sha256":"1a94a19ff6c2e58abd9bd3317a8cbfaa98dc47dd3d63561fa89f3344eb6629db","abstract_canon_sha256":"76eac5b1e135e50f12c9b804f786621cb8f00fa27d122afbadd01938fe62aef2"},"schema_version":"1.0"},"canonical_sha256":"19ed881302606163b144ccc65b7a6295c8b547ac1879590bbfd74278f6b4a265","source":{"kind":"arxiv","id":"2107.07094","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.07094","created_at":"2026-07-05T03:19:18Z"},{"alias_kind":"arxiv_version","alias_value":"2107.07094v1","created_at":"2026-07-05T03:19:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.07094","created_at":"2026-07-05T03:19:18Z"},{"alias_kind":"pith_short_12","alias_value":"DHWYQEYCMBQW","created_at":"2026-07-05T03:19:18Z"},{"alias_kind":"pith_short_16","alias_value":"DHWYQEYCMBQWHMKE","created_at":"2026-07-05T03:19:18Z"},{"alias_kind":"pith_short_8","alias_value":"DHWYQEYC","created_at":"2026-07-05T03:19:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:DHWYQEYCMBQWHMKEZTDFW6TCSX","target":"record","payload":{"canonical_record":{"source":{"id":"2107.07094","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-07-15T03:11:10Z","cross_cats_sorted":["physics.plasm-ph"],"title_canon_sha256":"1a94a19ff6c2e58abd9bd3317a8cbfaa98dc47dd3d63561fa89f3344eb6629db","abstract_canon_sha256":"76eac5b1e135e50f12c9b804f786621cb8f00fa27d122afbadd01938fe62aef2"},"schema_version":"1.0"},"canonical_sha256":"19ed881302606163b144ccc65b7a6295c8b547ac1879590bbfd74278f6b4a265","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:19:18.101965Z","signature_b64":"N3vF0cNRB9E6jj5eyQKGhHlHBnWPMStQjzUZQI8R1rwJa/KfIFA5lTqF8fkyKik7SmoNEIlRJ3Zx4h5pKHCFCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"19ed881302606163b144ccc65b7a6295c8b547ac1879590bbfd74278f6b4a265","last_reissued_at":"2026-07-05T03:19:18.101400Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:19:18.101400Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.07094","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:19:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5MzaKB4FkGx6a+0z18ai2RxA57h9qEm3NNeRILVWNpSW3jGAyGurg9hLO0KmQ4VIjLNhraVu3btvsn4i4eflAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-02T23:10:24.432564Z"},"content_sha256":"93f11a3829c140409fdfa2ad8a5d85ac7c889433c184e5d4cad28e8745aac4e8","schema_version":"1.0","event_id":"sha256:93f11a3829c140409fdfa2ad8a5d85ac7c889433c184e5d4cad28e8745aac4e8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:DHWYQEYCMBQWHMKEZTDFW6TCSX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Phase Separation in Ultramassive White Dwarfs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.plasm-ph"],"primary_cat":"astro-ph.SR","authors_text":"Jerome Daligault, Simon Blouin","submitted_at":"2021-07-15T03:11:10Z","abstract_excerpt":"Ultramassive white dwarfs are extreme endpoints of stellar evolution. Recent findings, such as a missing multi-Gyr cooling delay for a number of ultramassive white dwarfs and a white dwarf with a quasi-Chandrasekhar mass, motivate a better understanding of their evolution. A key process still subject to important uncertainties is the crystallization of their dense cores, which are generally assumed to be constituted of $^{16}$O, $^{20}$Ne, and a mixture of several trace elements (most notably $^{23}$Na and $^{24}$Mg). In this work, we use our recently developed Clapeyron integration technique "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.07094","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2107.07094/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:19:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O8nZtlzdffZaXRb2Du5y9f8isa6LoJh1LqIftB1o0OSEywCA9+/s6hevBs6eEM37BHKo35jeshfHNTHfw512BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-02T23:10:24.433467Z"},"content_sha256":"cc26a7c918a135bc3f87b5eea72c07dffdf50285af885435b2c4d7e6f348e08b","schema_version":"1.0","event_id":"sha256:cc26a7c918a135bc3f87b5eea72c07dffdf50285af885435b2c4d7e6f348e08b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DHWYQEYCMBQWHMKEZTDFW6TCSX/bundle.json","state_url":"https://pith.science/pith/DHWYQEYCMBQWHMKEZTDFW6TCSX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DHWYQEYCMBQWHMKEZTDFW6TCSX/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-02T23:10:24Z","links":{"resolver":"https://pith.science/pith/DHWYQEYCMBQWHMKEZTDFW6TCSX","bundle":"https://pith.science/pith/DHWYQEYCMBQWHMKEZTDFW6TCSX/bundle.json","state":"https://pith.science/pith/DHWYQEYCMBQWHMKEZTDFW6TCSX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DHWYQEYCMBQWHMKEZTDFW6TCSX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:DHWYQEYCMBQWHMKEZTDFW6TCSX","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":"76eac5b1e135e50f12c9b804f786621cb8f00fa27d122afbadd01938fe62aef2","cross_cats_sorted":["physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-07-15T03:11:10Z","title_canon_sha256":"1a94a19ff6c2e58abd9bd3317a8cbfaa98dc47dd3d63561fa89f3344eb6629db"},"schema_version":"1.0","source":{"id":"2107.07094","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.07094","created_at":"2026-07-05T03:19:18Z"},{"alias_kind":"arxiv_version","alias_value":"2107.07094v1","created_at":"2026-07-05T03:19:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.07094","created_at":"2026-07-05T03:19:18Z"},{"alias_kind":"pith_short_12","alias_value":"DHWYQEYCMBQW","created_at":"2026-07-05T03:19:18Z"},{"alias_kind":"pith_short_16","alias_value":"DHWYQEYCMBQWHMKE","created_at":"2026-07-05T03:19:18Z"},{"alias_kind":"pith_short_8","alias_value":"DHWYQEYC","created_at":"2026-07-05T03:19:18Z"}],"graph_snapshots":[{"event_id":"sha256:cc26a7c918a135bc3f87b5eea72c07dffdf50285af885435b2c4d7e6f348e08b","target":"graph","created_at":"2026-07-05T03:19:18Z","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/2107.07094/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Ultramassive white dwarfs are extreme endpoints of stellar evolution. Recent findings, such as a missing multi-Gyr cooling delay for a number of ultramassive white dwarfs and a white dwarf with a quasi-Chandrasekhar mass, motivate a better understanding of their evolution. A key process still subject to important uncertainties is the crystallization of their dense cores, which are generally assumed to be constituted of $^{16}$O, $^{20}$Ne, and a mixture of several trace elements (most notably $^{23}$Na and $^{24}$Mg). In this work, we use our recently developed Clapeyron integration technique ","authors_text":"Jerome Daligault, Simon Blouin","cross_cats":["physics.plasm-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-07-15T03:11:10Z","title":"Phase Separation in Ultramassive White Dwarfs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.07094","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":"sha256:93f11a3829c140409fdfa2ad8a5d85ac7c889433c184e5d4cad28e8745aac4e8","target":"record","created_at":"2026-07-05T03:19:18Z","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":"76eac5b1e135e50f12c9b804f786621cb8f00fa27d122afbadd01938fe62aef2","cross_cats_sorted":["physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-07-15T03:11:10Z","title_canon_sha256":"1a94a19ff6c2e58abd9bd3317a8cbfaa98dc47dd3d63561fa89f3344eb6629db"},"schema_version":"1.0","source":{"id":"2107.07094","kind":"arxiv","version":1}},"canonical_sha256":"19ed881302606163b144ccc65b7a6295c8b547ac1879590bbfd74278f6b4a265","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"19ed881302606163b144ccc65b7a6295c8b547ac1879590bbfd74278f6b4a265","first_computed_at":"2026-07-05T03:19:18.101400Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:19:18.101400Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"N3vF0cNRB9E6jj5eyQKGhHlHBnWPMStQjzUZQI8R1rwJa/KfIFA5lTqF8fkyKik7SmoNEIlRJ3Zx4h5pKHCFCA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:19:18.101965Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.07094","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:93f11a3829c140409fdfa2ad8a5d85ac7c889433c184e5d4cad28e8745aac4e8","sha256:cc26a7c918a135bc3f87b5eea72c07dffdf50285af885435b2c4d7e6f348e08b"],"state_sha256":"fe490969e6b8f499a299e5ecbf39339ec50740c33a7a8bd9591c9acaa9f39624"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aXC0Cyp0xizC3ZYFC7Hi+MArzHt/30n4Wcj4+mvPA/4XAbojcywBLQFjHSlnacNoL6tqhuhE91UJ55eZ3q9cDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-02T23:10:24.441659Z","bundle_sha256":"fb60a655cc98feb589fa6cde04551f0e713ab61e3418ad823d71e172629bfe84"}}