{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:L7CA2RMGTKE6R5H7D5MNLFUMAX","short_pith_number":"pith:L7CA2RMG","canonical_record":{"source":{"id":"astro-ph/0702138","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-02-06T00:10:34Z","cross_cats_sorted":[],"title_canon_sha256":"0dfe1c418715687302ff12a0508f3885fcc31189a839aa3d76be00abf8962106","abstract_canon_sha256":"e796243aaeac0c705aaca40be4ad18a5b103f8e95f129e6de44a0b03ef3453f8"},"schema_version":"1.0"},"canonical_sha256":"5fc40d45869a89e8f4ff1f58d5968c05c2fc559bc81bb4b4f272c5661b9255fd","source":{"kind":"arxiv","id":"astro-ph/0702138","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0702138","created_at":"2026-07-04T15:21:53Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0702138v1","created_at":"2026-07-04T15:21:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0702138","created_at":"2026-07-04T15:21:53Z"},{"alias_kind":"pith_short_12","alias_value":"L7CA2RMGTKE6","created_at":"2026-07-04T15:21:53Z"},{"alias_kind":"pith_short_16","alias_value":"L7CA2RMGTKE6R5H7","created_at":"2026-07-04T15:21:53Z"},{"alias_kind":"pith_short_8","alias_value":"L7CA2RMG","created_at":"2026-07-04T15:21:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:L7CA2RMGTKE6R5H7D5MNLFUMAX","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0702138","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-02-06T00:10:34Z","cross_cats_sorted":[],"title_canon_sha256":"0dfe1c418715687302ff12a0508f3885fcc31189a839aa3d76be00abf8962106","abstract_canon_sha256":"e796243aaeac0c705aaca40be4ad18a5b103f8e95f129e6de44a0b03ef3453f8"},"schema_version":"1.0"},"canonical_sha256":"5fc40d45869a89e8f4ff1f58d5968c05c2fc559bc81bb4b4f272c5661b9255fd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:21:53.522579Z","signature_b64":"2aapmkSoLgYCs6caUBzBvXQQiveCswbS1d88weFAlZ8XwsHPVGXr34b5RzkwkWGKaalJwluHBOM9rTqOheL+Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5fc40d45869a89e8f4ff1f58d5968c05c2fc559bc81bb4b4f272c5661b9255fd","last_reissued_at":"2026-07-04T15:21:53.522124Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:21:53.522124Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0702138","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":"2026-07-04T15:21:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i2MvDsk/boNypTJ39WFDEh4TZLffusIs9CC4Rz+lKKYmhzto5iM7HGBa0w9iyXhqhmsX+MNk23KlszXE3wWHCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T11:54:58.163178Z"},"content_sha256":"3d5f9bdf0513d81661f198fbf0b1fce39762cb2ec1ddaf949fc60a5e43063423","schema_version":"1.0","event_id":"sha256:3d5f9bdf0513d81661f198fbf0b1fce39762cb2ec1ddaf949fc60a5e43063423"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:L7CA2RMGTKE6R5H7D5MNLFUMAX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Carbon-enhanced metal-poor stars and thermohaline mixing","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Cambridge), Evert Glebbeek, Onno R. Pols (Sterrekundig Instituut Utrecht), Richard J. Stancliffe (IoA, Robert G. Izzard","submitted_at":"2007-02-06T00:10:34Z","abstract_excerpt":"One possible scenario for the formation of carbon-enhanced metal-poor stars is the accretion of carbon-rich material from a binary companion which may no longer visible. It is generally assumed that the accreted material remains on the surface of the star and does not mix with the interior until first dredge-up. However, thermohaline mixing should mix the accreted material with the original stellar material as it has a higher mean molecular weight. We investigate the effect that this has on the surface abundances by modelling a binary system of metallicity Z=0.0001 with a 2 solar mass primary "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0702138","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/astro-ph/0702138/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":"2026-07-04T15:21:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G3mqxO/XOyNaNCdIHmIOSzsgoFehG2ox+R23VkUatFUYZHDKnBEtfs5tMPMFXLKCwBOH/4sbxEyOEdGMdah3CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T11:54:58.164075Z"},"content_sha256":"36ce2fde2c9d44773d4f3990ab7d43e8b50ada090eb34d40be7c1d2eb72a4771","schema_version":"1.0","event_id":"sha256:36ce2fde2c9d44773d4f3990ab7d43e8b50ada090eb34d40be7c1d2eb72a4771"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L7CA2RMGTKE6R5H7D5MNLFUMAX/bundle.json","state_url":"https://pith.science/pith/L7CA2RMGTKE6R5H7D5MNLFUMAX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L7CA2RMGTKE6R5H7D5MNLFUMAX/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":"2026-08-05T11:54:58Z","links":{"resolver":"https://pith.science/pith/L7CA2RMGTKE6R5H7D5MNLFUMAX","bundle":"https://pith.science/pith/L7CA2RMGTKE6R5H7D5MNLFUMAX/bundle.json","state":"https://pith.science/pith/L7CA2RMGTKE6R5H7D5MNLFUMAX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L7CA2RMGTKE6R5H7D5MNLFUMAX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:L7CA2RMGTKE6R5H7D5MNLFUMAX","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":"e796243aaeac0c705aaca40be4ad18a5b103f8e95f129e6de44a0b03ef3453f8","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-02-06T00:10:34Z","title_canon_sha256":"0dfe1c418715687302ff12a0508f3885fcc31189a839aa3d76be00abf8962106"},"schema_version":"1.0","source":{"id":"astro-ph/0702138","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0702138","created_at":"2026-07-04T15:21:53Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0702138v1","created_at":"2026-07-04T15:21:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0702138","created_at":"2026-07-04T15:21:53Z"},{"alias_kind":"pith_short_12","alias_value":"L7CA2RMGTKE6","created_at":"2026-07-04T15:21:53Z"},{"alias_kind":"pith_short_16","alias_value":"L7CA2RMGTKE6R5H7","created_at":"2026-07-04T15:21:53Z"},{"alias_kind":"pith_short_8","alias_value":"L7CA2RMG","created_at":"2026-07-04T15:21:53Z"}],"graph_snapshots":[{"event_id":"sha256:36ce2fde2c9d44773d4f3990ab7d43e8b50ada090eb34d40be7c1d2eb72a4771","target":"graph","created_at":"2026-07-04T15:21:53Z","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/0702138/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"One possible scenario for the formation of carbon-enhanced metal-poor stars is the accretion of carbon-rich material from a binary companion which may no longer visible. It is generally assumed that the accreted material remains on the surface of the star and does not mix with the interior until first dredge-up. However, thermohaline mixing should mix the accreted material with the original stellar material as it has a higher mean molecular weight. We investigate the effect that this has on the surface abundances by modelling a binary system of metallicity Z=0.0001 with a 2 solar mass primary ","authors_text":"Cambridge), Evert Glebbeek, Onno R. Pols (Sterrekundig Instituut Utrecht), Richard J. Stancliffe (IoA, Robert G. Izzard","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-02-06T00:10:34Z","title":"Carbon-enhanced metal-poor stars and thermohaline mixing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0702138","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":"sha256:3d5f9bdf0513d81661f198fbf0b1fce39762cb2ec1ddaf949fc60a5e43063423","target":"record","created_at":"2026-07-04T15:21:53Z","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":"e796243aaeac0c705aaca40be4ad18a5b103f8e95f129e6de44a0b03ef3453f8","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-02-06T00:10:34Z","title_canon_sha256":"0dfe1c418715687302ff12a0508f3885fcc31189a839aa3d76be00abf8962106"},"schema_version":"1.0","source":{"id":"astro-ph/0702138","kind":"arxiv","version":1}},"canonical_sha256":"5fc40d45869a89e8f4ff1f58d5968c05c2fc559bc81bb4b4f272c5661b9255fd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5fc40d45869a89e8f4ff1f58d5968c05c2fc559bc81bb4b4f272c5661b9255fd","first_computed_at":"2026-07-04T15:21:53.522124Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:21:53.522124Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2aapmkSoLgYCs6caUBzBvXQQiveCswbS1d88weFAlZ8XwsHPVGXr34b5RzkwkWGKaalJwluHBOM9rTqOheL+Dg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:21:53.522579Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0702138","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3d5f9bdf0513d81661f198fbf0b1fce39762cb2ec1ddaf949fc60a5e43063423","sha256:36ce2fde2c9d44773d4f3990ab7d43e8b50ada090eb34d40be7c1d2eb72a4771"],"state_sha256":"49b396d859ba91f8382365e772fc0507e22ca61cb852d60de104fa38c6e82fb1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KoVjEH4IoMiszZnXtdtyBox59W6S/NFKerZ0svZFXLDK0LRoRR5TvcM54hMcQPhRUwgrE9SXmx26HRnxNmXZCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T11:54:58.169648Z","bundle_sha256":"df722920b643b3f9eb8b17e4c1bb424d44ffe4dd99586d2c9a3e2ce15351eabc"}}