{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:SUSL42UN6WEVGNSMSOQ5UV47R3","short_pith_number":"pith:SUSL42UN","canonical_record":{"source":{"id":"2504.08880","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-04-11T18:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"e0e2f406dcfc7ba8bb1338b85427fd99abf9b6d2edcc6e5673aacfc39dd2f17b","abstract_canon_sha256":"579f85ac17909d1f658f0665068a4b23292c013910091f2b18de7ceabee10e06"},"schema_version":"1.0"},"canonical_sha256":"9524be6a8df58953364c93a1da579f8ed9554e97b7ebbeeb5c7d9ea896ff7339","source":{"kind":"arxiv","id":"2504.08880","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.08880","created_at":"2026-07-05T11:06:13Z"},{"alias_kind":"arxiv_version","alias_value":"2504.08880v1","created_at":"2026-07-05T11:06:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.08880","created_at":"2026-07-05T11:06:13Z"},{"alias_kind":"pith_short_12","alias_value":"SUSL42UN6WEV","created_at":"2026-07-05T11:06:13Z"},{"alias_kind":"pith_short_16","alias_value":"SUSL42UN6WEVGNSM","created_at":"2026-07-05T11:06:13Z"},{"alias_kind":"pith_short_8","alias_value":"SUSL42UN","created_at":"2026-07-05T11:06:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:SUSL42UN6WEVGNSMSOQ5UV47R3","target":"record","payload":{"canonical_record":{"source":{"id":"2504.08880","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-04-11T18:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"e0e2f406dcfc7ba8bb1338b85427fd99abf9b6d2edcc6e5673aacfc39dd2f17b","abstract_canon_sha256":"579f85ac17909d1f658f0665068a4b23292c013910091f2b18de7ceabee10e06"},"schema_version":"1.0"},"canonical_sha256":"9524be6a8df58953364c93a1da579f8ed9554e97b7ebbeeb5c7d9ea896ff7339","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:06:13.101501Z","signature_b64":"e5wx2U7NPxUBKz++DHDDdvo9Bi3zCCR33/JxO/gaTauUONMp+UoyyZBK4g4bOzUmh0y304EkwBmjF1qEeeyqCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9524be6a8df58953364c93a1da579f8ed9554e97b7ebbeeb5c7d9ea896ff7339","last_reissued_at":"2026-07-05T11:06:13.101042Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:06:13.101042Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2504.08880","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":"2026-07-05T11:06:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0kCTFsh5sbW9tbeixaGielLJFjDX8ggN1va27rFZuB7imRhMoSu7Mh5Qt8Wx/IePRAsvDuJAWA8A6mO55XtiDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-21T21:45:45.340018Z"},"content_sha256":"886c5ad0b829296b186d416dc841243cf99c6191f2c9ef8ad2fb5f97bc78f9df","schema_version":"1.0","event_id":"sha256:886c5ad0b829296b186d416dc841243cf99c6191f2c9ef8ad2fb5f97bc78f9df"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:SUSL42UN6WEVGNSMSOQ5UV47R3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Exploring the connection between atmosphere models and evolution models of very massive stars","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Andreas A. C. Sander, Elisa C. Sch\\\"osser, Gemma Gonz\\'alez-Tor\\`a, Joris Josiek, Matheus Bernini-Peron, Nicolas Moens, Roel R. Lefever, Sylvia Ekstr\\\"om, Varsha Ramachandran","submitted_at":"2025-04-11T18:00:00Z","abstract_excerpt":"Very massive stars (VMS) dominate the light of young stellar populations and are sources of intense stellar feedback. Their evolution is mainly driven by strong wind mass loss, yet current evolution models make simplistic assumptions on their atmospheric physics which are incompatible with the nature of VMS. In this work, we aim to understand VMS atmospheres throughout their evolution by supplementing structure models (computed with GENEC) with detailed atmosphere models (computed with PoWR) capable of capturing the physics of a radially-expanding medium in non-LTE. An important aspect is the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.08880","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/2504.08880/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":"2026-07-05T11:06:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ajlI9b7kEmr62yLnX++jFznstUFo19/5rAUq+I/YxfelaYDYLD5IGYc7//Ah921vcKGyiBM4pQjt4WezS1ThBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-21T21:45:45.340409Z"},"content_sha256":"b90019384544fe60cfed26cc2ea69aa61a2d28f8899eb66ba3b1d7bf53f19ea8","schema_version":"1.0","event_id":"sha256:b90019384544fe60cfed26cc2ea69aa61a2d28f8899eb66ba3b1d7bf53f19ea8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SUSL42UN6WEVGNSMSOQ5UV47R3/bundle.json","state_url":"https://pith.science/pith/SUSL42UN6WEVGNSMSOQ5UV47R3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SUSL42UN6WEVGNSMSOQ5UV47R3/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":"2026-07-21T21:45:45Z","links":{"resolver":"https://pith.science/pith/SUSL42UN6WEVGNSMSOQ5UV47R3","bundle":"https://pith.science/pith/SUSL42UN6WEVGNSMSOQ5UV47R3/bundle.json","state":"https://pith.science/pith/SUSL42UN6WEVGNSMSOQ5UV47R3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SUSL42UN6WEVGNSMSOQ5UV47R3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:SUSL42UN6WEVGNSMSOQ5UV47R3","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":"579f85ac17909d1f658f0665068a4b23292c013910091f2b18de7ceabee10e06","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-04-11T18:00:00Z","title_canon_sha256":"e0e2f406dcfc7ba8bb1338b85427fd99abf9b6d2edcc6e5673aacfc39dd2f17b"},"schema_version":"1.0","source":{"id":"2504.08880","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.08880","created_at":"2026-07-05T11:06:13Z"},{"alias_kind":"arxiv_version","alias_value":"2504.08880v1","created_at":"2026-07-05T11:06:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.08880","created_at":"2026-07-05T11:06:13Z"},{"alias_kind":"pith_short_12","alias_value":"SUSL42UN6WEV","created_at":"2026-07-05T11:06:13Z"},{"alias_kind":"pith_short_16","alias_value":"SUSL42UN6WEVGNSM","created_at":"2026-07-05T11:06:13Z"},{"alias_kind":"pith_short_8","alias_value":"SUSL42UN","created_at":"2026-07-05T11:06:13Z"}],"graph_snapshots":[{"event_id":"sha256:b90019384544fe60cfed26cc2ea69aa61a2d28f8899eb66ba3b1d7bf53f19ea8","target":"graph","created_at":"2026-07-05T11:06:13Z","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/2504.08880/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Very massive stars (VMS) dominate the light of young stellar populations and are sources of intense stellar feedback. Their evolution is mainly driven by strong wind mass loss, yet current evolution models make simplistic assumptions on their atmospheric physics which are incompatible with the nature of VMS. In this work, we aim to understand VMS atmospheres throughout their evolution by supplementing structure models (computed with GENEC) with detailed atmosphere models (computed with PoWR) capable of capturing the physics of a radially-expanding medium in non-LTE. An important aspect is the ","authors_text":"Andreas A. C. Sander, Elisa C. Sch\\\"osser, Gemma Gonz\\'alez-Tor\\`a, Joris Josiek, Matheus Bernini-Peron, Nicolas Moens, Roel R. Lefever, Sylvia Ekstr\\\"om, Varsha Ramachandran","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-04-11T18:00:00Z","title":"Exploring the connection between atmosphere models and evolution models of very massive stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.08880","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":"sha256:886c5ad0b829296b186d416dc841243cf99c6191f2c9ef8ad2fb5f97bc78f9df","target":"record","created_at":"2026-07-05T11:06:13Z","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":"579f85ac17909d1f658f0665068a4b23292c013910091f2b18de7ceabee10e06","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-04-11T18:00:00Z","title_canon_sha256":"e0e2f406dcfc7ba8bb1338b85427fd99abf9b6d2edcc6e5673aacfc39dd2f17b"},"schema_version":"1.0","source":{"id":"2504.08880","kind":"arxiv","version":1}},"canonical_sha256":"9524be6a8df58953364c93a1da579f8ed9554e97b7ebbeeb5c7d9ea896ff7339","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9524be6a8df58953364c93a1da579f8ed9554e97b7ebbeeb5c7d9ea896ff7339","first_computed_at":"2026-07-05T11:06:13.101042Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:06:13.101042Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"e5wx2U7NPxUBKz++DHDDdvo9Bi3zCCR33/JxO/gaTauUONMp+UoyyZBK4g4bOzUmh0y304EkwBmjF1qEeeyqCg==","signature_status":"signed_v1","signed_at":"2026-07-05T11:06:13.101501Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.08880","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:886c5ad0b829296b186d416dc841243cf99c6191f2c9ef8ad2fb5f97bc78f9df","sha256:b90019384544fe60cfed26cc2ea69aa61a2d28f8899eb66ba3b1d7bf53f19ea8"],"state_sha256":"a3c0d3cd57e4958f209e41827257dd372f9f8887e79f9bfd3ade12558a63fd76"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GmTgCgmm2PP9LOlnN2OFO678dzgjN9lOi3saAuLA4bhpEXs+E/8SDUAnCHGy4bZxpEk7YoDUzJSYSLhaTwvWBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-21T21:45:45.342588Z","bundle_sha256":"674bef08d994330126da5812c67bfc126e67a0422b34952da727e3d086e0c29b"}}