{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:FK4BKR5GI4HPXQ5A4GBKAXQKXD","short_pith_number":"pith:FK4BKR5G","canonical_record":{"source":{"id":"1904.12421","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-04-29T02:13:40Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"411198f5a89e507453f040f2ac35742577cb3db99e6520cd9f813e7256187022","abstract_canon_sha256":"fce9f3c42c22c671b5ab7d2b0909dfb9c88c598b8fdf521216bc5bd0378d75e9"},"schema_version":"1.0"},"canonical_sha256":"2ab81547a6470efbc3a0e182a05e0ab8cb165d6c65a6ea903f85a1c4397eb8d9","source":{"kind":"arxiv","id":"1904.12421","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.12421","created_at":"2026-05-17T23:42:19Z"},{"alias_kind":"arxiv_version","alias_value":"1904.12421v1","created_at":"2026-05-17T23:42:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.12421","created_at":"2026-05-17T23:42:19Z"},{"alias_kind":"pith_short_12","alias_value":"FK4BKR5GI4HP","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"FK4BKR5GI4HPXQ5A","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"FK4BKR5G","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:FK4BKR5GI4HPXQ5A4GBKAXQKXD","target":"record","payload":{"canonical_record":{"source":{"id":"1904.12421","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-04-29T02:13:40Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"411198f5a89e507453f040f2ac35742577cb3db99e6520cd9f813e7256187022","abstract_canon_sha256":"fce9f3c42c22c671b5ab7d2b0909dfb9c88c598b8fdf521216bc5bd0378d75e9"},"schema_version":"1.0"},"canonical_sha256":"2ab81547a6470efbc3a0e182a05e0ab8cb165d6c65a6ea903f85a1c4397eb8d9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:19.543847Z","signature_b64":"PPsw1GarDH5ob1099gSx4fR8LHQt0vLdd79GcVBmxFFuB75/Wfsdi0adYV2oQhPITKVp1iV6o1oohKDwinS/BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2ab81547a6470efbc3a0e182a05e0ab8cb165d6c65a6ea903f85a1c4397eb8d9","last_reissued_at":"2026-05-17T23:42:19.543379Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:19.543379Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.12421","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":"2026-05-17T23:42:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MXuCq3twpHRzZotbaZDtmeJCdvdXzQG7Og5jQazybM0Jb9U8xi3H/+i11OsHMu0Tk+NrNngiS0PgQXzHBSGWBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T18:11:09.491134Z"},"content_sha256":"377522c35d4222c87de1c6839819cb427b08622a3e6755c2e0a19e29aca067e9","schema_version":"1.0","event_id":"sha256:377522c35d4222c87de1c6839819cb427b08622a3e6755c2e0a19e29aca067e9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:FK4BKR5GI4HPXQ5A4GBKAXQKXD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Evolution of Helium Star Plus Carbon-Oxygen White Dwarf Binary Systems and Implications for Diverse Stellar Transients and Hypervelocity Stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"N. Langer, P. Neunteufel, S.-C. Yoon","submitted_at":"2019-04-29T02:13:40Z","abstract_excerpt":"Helium accretion induced explosions in CO white dwarfs (WDs) are considered promising candidates for a number of observed types of stellar transients, including supernovae (SNe) of Type Ia and Type Iax. However, a clear favorite outcome has not yet emerged. We explore the conditions of helium ignition in the white dwarf and the final fates of helium star-WD binaries as function of their initial orbital periods and component masses. We compute 274 model binary systems with the Binary Evolution Code (BEC), where both components are fully resolved. Stellar and orbital evolution is computed simult"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.12421","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":""},"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":"2026-05-17T23:42:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"egS4jmAyHTyj3A4yc2Fx9X0VvS4kc9Tp+RYxuLimhYswsFYhnOAXDhEPHg3nbDzyMFddyP/YRE85c7VYEG1RAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T18:11:09.491511Z"},"content_sha256":"79cc60a7190ec8eee75b699e0b6c445f446dfcd4f7812804512bea259a738a60","schema_version":"1.0","event_id":"sha256:79cc60a7190ec8eee75b699e0b6c445f446dfcd4f7812804512bea259a738a60"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FK4BKR5GI4HPXQ5A4GBKAXQKXD/bundle.json","state_url":"https://pith.science/pith/FK4BKR5GI4HPXQ5A4GBKAXQKXD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FK4BKR5GI4HPXQ5A4GBKAXQKXD/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":"2026-05-30T18:11:09Z","links":{"resolver":"https://pith.science/pith/FK4BKR5GI4HPXQ5A4GBKAXQKXD","bundle":"https://pith.science/pith/FK4BKR5GI4HPXQ5A4GBKAXQKXD/bundle.json","state":"https://pith.science/pith/FK4BKR5GI4HPXQ5A4GBKAXQKXD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FK4BKR5GI4HPXQ5A4GBKAXQKXD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:FK4BKR5GI4HPXQ5A4GBKAXQKXD","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":"fce9f3c42c22c671b5ab7d2b0909dfb9c88c598b8fdf521216bc5bd0378d75e9","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-04-29T02:13:40Z","title_canon_sha256":"411198f5a89e507453f040f2ac35742577cb3db99e6520cd9f813e7256187022"},"schema_version":"1.0","source":{"id":"1904.12421","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.12421","created_at":"2026-05-17T23:42:19Z"},{"alias_kind":"arxiv_version","alias_value":"1904.12421v1","created_at":"2026-05-17T23:42:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.12421","created_at":"2026-05-17T23:42:19Z"},{"alias_kind":"pith_short_12","alias_value":"FK4BKR5GI4HP","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"FK4BKR5GI4HPXQ5A","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"FK4BKR5G","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:79cc60a7190ec8eee75b699e0b6c445f446dfcd4f7812804512bea259a738a60","target":"graph","created_at":"2026-05-17T23:42:19Z","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":"Helium accretion induced explosions in CO white dwarfs (WDs) are considered promising candidates for a number of observed types of stellar transients, including supernovae (SNe) of Type Ia and Type Iax. However, a clear favorite outcome has not yet emerged. We explore the conditions of helium ignition in the white dwarf and the final fates of helium star-WD binaries as function of their initial orbital periods and component masses. We compute 274 model binary systems with the Binary Evolution Code (BEC), where both components are fully resolved. Stellar and orbital evolution is computed simult","authors_text":"N. Langer, P. Neunteufel, S.-C. Yoon","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-04-29T02:13:40Z","title":"The Evolution of Helium Star Plus Carbon-Oxygen White Dwarf Binary Systems and Implications for Diverse Stellar Transients and Hypervelocity Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.12421","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":"sha256:377522c35d4222c87de1c6839819cb427b08622a3e6755c2e0a19e29aca067e9","target":"record","created_at":"2026-05-17T23:42:19Z","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":"fce9f3c42c22c671b5ab7d2b0909dfb9c88c598b8fdf521216bc5bd0378d75e9","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-04-29T02:13:40Z","title_canon_sha256":"411198f5a89e507453f040f2ac35742577cb3db99e6520cd9f813e7256187022"},"schema_version":"1.0","source":{"id":"1904.12421","kind":"arxiv","version":1}},"canonical_sha256":"2ab81547a6470efbc3a0e182a05e0ab8cb165d6c65a6ea903f85a1c4397eb8d9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2ab81547a6470efbc3a0e182a05e0ab8cb165d6c65a6ea903f85a1c4397eb8d9","first_computed_at":"2026-05-17T23:42:19.543379Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:19.543379Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PPsw1GarDH5ob1099gSx4fR8LHQt0vLdd79GcVBmxFFuB75/Wfsdi0adYV2oQhPITKVp1iV6o1oohKDwinS/BQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:19.543847Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.12421","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:377522c35d4222c87de1c6839819cb427b08622a3e6755c2e0a19e29aca067e9","sha256:79cc60a7190ec8eee75b699e0b6c445f446dfcd4f7812804512bea259a738a60"],"state_sha256":"d2a5af109f5b7f36d42495c5b55436b3f3c73b06fb34fe34b976c8d213b8ab4c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hZ4gufKshGg2tIZbG9XailJ6KGRA7Vrzpdf4Fvm0opBQeaGOMqCMflILwoAHdA/SU4G3V5pCsdpfwHLVeU2rAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T18:11:09.493812Z","bundle_sha256":"cac34610a5e46ed4d52ab62f708f9f70313ef5178cc1c3d67e81f9e1f4cbb47b"}}