{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:6QVSRYGH3XCMOUJYBIUEO7RVRO","short_pith_number":"pith:6QVSRYGH","schema_version":"1.0","canonical_sha256":"f42b28e0c7ddc4c751380a28477e358ba21b7a67d2d2328f5a60a1ca510b7aa7","source":{"kind":"arxiv","id":"2605.21236","version":1},"attestation_state":"computed","paper":{"title":"The Beauty of k2: Probing Stellar Interiors Using Apsidal Motion. I. The Benchmark Massive Binary HD 152248","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Cyril Georgy, Joris Josiek, Luca Sciarini, Patrick Eggenberger, Sophie Rosu, Sylvia Ekstr\\\"om","submitted_at":"2026-05-20T14:25:06Z","abstract_excerpt":"Over the last decades, several independent studies have shown the need for large convective boundary mixing (CBM) and convective core sizes in massive stars to reproduce a variety of their observed properties. Yet, stars more massive than 20Msun lack a quantitative prescription for CBM as well as an unequivocal constraint on the internal mixing mechanisms acting in them. We use the apsidal motion observed in the twin binary HD152248 - linked to the internal stellar structure constants k2 of the stars - to constrain massive stars' internal density stratification and CBM. We build GENEC stellar "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2605.21236","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2026-05-20T14:25:06Z","cross_cats_sorted":[],"title_canon_sha256":"2d5d4d7f82108fa1d02bb33de623e5b48eadf40aeb240cbc0b70dae0918bf7bf","abstract_canon_sha256":"e28ec57342a17584a42136e605060922b6790379554fe540e7aa1cc0a8b5aede"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-21T01:05:45.079976Z","signature_b64":"MZBLNETiuzcugIInoxwZiqX4xXo3UcQgdL34yh3eAsCqa5n/Jwc+1GOa9EIvXWx5EqWDLm75uCF1n7C6bpRqBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f42b28e0c7ddc4c751380a28477e358ba21b7a67d2d2328f5a60a1ca510b7aa7","last_reissued_at":"2026-05-21T01:05:45.079426Z","signature_status":"signed_v1","first_computed_at":"2026-05-21T01:05:45.079426Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Beauty of k2: Probing Stellar Interiors Using Apsidal Motion. I. The Benchmark Massive Binary HD 152248","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Cyril Georgy, Joris Josiek, Luca Sciarini, Patrick Eggenberger, Sophie Rosu, Sylvia Ekstr\\\"om","submitted_at":"2026-05-20T14:25:06Z","abstract_excerpt":"Over the last decades, several independent studies have shown the need for large convective boundary mixing (CBM) and convective core sizes in massive stars to reproduce a variety of their observed properties. Yet, stars more massive than 20Msun lack a quantitative prescription for CBM as well as an unequivocal constraint on the internal mixing mechanisms acting in them. We use the apsidal motion observed in the twin binary HD152248 - linked to the internal stellar structure constants k2 of the stars - to constrain massive stars' internal density stratification and CBM. We build GENEC stellar "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.21236","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/2605.21236/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2605.21236","created_at":"2026-05-21T01:05:45.079513+00:00"},{"alias_kind":"arxiv_version","alias_value":"2605.21236v1","created_at":"2026-05-21T01:05:45.079513+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.21236","created_at":"2026-05-21T01:05:45.079513+00:00"},{"alias_kind":"pith_short_12","alias_value":"6QVSRYGH3XCM","created_at":"2026-05-21T01:05:45.079513+00:00"},{"alias_kind":"pith_short_16","alias_value":"6QVSRYGH3XCMOUJY","created_at":"2026-05-21T01:05:45.079513+00:00"},{"alias_kind":"pith_short_8","alias_value":"6QVSRYGH","created_at":"2026-05-21T01:05:45.079513+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/6QVSRYGH3XCMOUJYBIUEO7RVRO","json":"https://pith.science/pith/6QVSRYGH3XCMOUJYBIUEO7RVRO.json","graph_json":"https://pith.science/api/pith-number/6QVSRYGH3XCMOUJYBIUEO7RVRO/graph.json","events_json":"https://pith.science/api/pith-number/6QVSRYGH3XCMOUJYBIUEO7RVRO/events.json","paper":"https://pith.science/paper/6QVSRYGH"},"agent_actions":{"view_html":"https://pith.science/pith/6QVSRYGH3XCMOUJYBIUEO7RVRO","download_json":"https://pith.science/pith/6QVSRYGH3XCMOUJYBIUEO7RVRO.json","view_paper":"https://pith.science/paper/6QVSRYGH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2605.21236&json=true","fetch_graph":"https://pith.science/api/pith-number/6QVSRYGH3XCMOUJYBIUEO7RVRO/graph.json","fetch_events":"https://pith.science/api/pith-number/6QVSRYGH3XCMOUJYBIUEO7RVRO/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6QVSRYGH3XCMOUJYBIUEO7RVRO/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6QVSRYGH3XCMOUJYBIUEO7RVRO/action/storage_attestation","attest_author":"https://pith.science/pith/6QVSRYGH3XCMOUJYBIUEO7RVRO/action/author_attestation","sign_citation":"https://pith.science/pith/6QVSRYGH3XCMOUJYBIUEO7RVRO/action/citation_signature","submit_replication":"https://pith.science/pith/6QVSRYGH3XCMOUJYBIUEO7RVRO/action/replication_record"}},"created_at":"2026-05-21T01:05:45.079513+00:00","updated_at":"2026-05-21T01:05:45.079513+00:00"}