{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:NEQYV4VJHNX5AOOUANRQHQX7O3","short_pith_number":"pith:NEQYV4VJ","canonical_record":{"source":{"id":"1105.5739","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-05-28T21:11:05Z","cross_cats_sorted":[],"title_canon_sha256":"7edffbc3034a177fab622728afed7492d519aac9c3345c67595aefe19b4cf255","abstract_canon_sha256":"b00bec4abebdf8200fef4a9b67b1a306e5175c5739524cdaac2548858fc80197"},"schema_version":"1.0"},"canonical_sha256":"69218af2a93b6fd039d4036303c2ff76ddf2af2df058e6bc39e9fcdbb3c91557","source":{"kind":"arxiv","id":"1105.5739","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.5739","created_at":"2026-05-18T02:01:46Z"},{"alias_kind":"arxiv_version","alias_value":"1105.5739v1","created_at":"2026-05-18T02:01:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.5739","created_at":"2026-05-18T02:01:46Z"},{"alias_kind":"pith_short_12","alias_value":"NEQYV4VJHNX5","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"NEQYV4VJHNX5AOOU","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"NEQYV4VJ","created_at":"2026-05-18T12:26:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:NEQYV4VJHNX5AOOUANRQHQX7O3","target":"record","payload":{"canonical_record":{"source":{"id":"1105.5739","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-05-28T21:11:05Z","cross_cats_sorted":[],"title_canon_sha256":"7edffbc3034a177fab622728afed7492d519aac9c3345c67595aefe19b4cf255","abstract_canon_sha256":"b00bec4abebdf8200fef4a9b67b1a306e5175c5739524cdaac2548858fc80197"},"schema_version":"1.0"},"canonical_sha256":"69218af2a93b6fd039d4036303c2ff76ddf2af2df058e6bc39e9fcdbb3c91557","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:46.749847Z","signature_b64":"9IU26FzaFs6WezBodXtNCkaqrwvHhJ/LX85ACDH4k7UxqEbPIV6i8XzdyRmV2E7XnorYU078wJ9aI03XxUTRDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"69218af2a93b6fd039d4036303c2ff76ddf2af2df058e6bc39e9fcdbb3c91557","last_reissued_at":"2026-05-18T02:01:46.749073Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:46.749073Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1105.5739","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":"2026-05-18T02:01:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U+ZMkrDxSnildHW5vwvXZjxhAOLWwLBAxmmg2k9+JGcwQSZ5lZT/dZeR/BVyxTLKxdSU9DfCG5NnuacKk+t5DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T03:07:11.651393Z"},"content_sha256":"d6bded824aef8cae2a75d8d5a97b436599aa3a64d8e69d53165a266c095b2a1a","schema_version":"1.0","event_id":"sha256:d6bded824aef8cae2a75d8d5a97b436599aa3a64d8e69d53165a266c095b2a1a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:NEQYV4VJHNX5AOOUANRQHQX7O3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Magnetic Flux Expulsion in Star Formation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"(2) NAOJ, (3) Academia Sinica), Bo Zhao (1), Fumitaka Nakamura (2), Hsien Shang (3) ((1) University of Virginia, Ruben Krasnopolsky (3), Zhi-Yun Li (1)","submitted_at":"2011-05-28T21:11:05Z","abstract_excerpt":"Stars form in dense cores of magnetized molecular clouds. If the magnetic flux threading the cores is dragged into the stars, the stellar field would be orders of magnitude stronger than observed. This well-known \"magnetic flux problem\" demands that most of the core magnetic flux be decoupled from the matter that enters the star. We carry out the first exploration of what happens to the decoupled magnetic flux in 3D, using an MHD version of the ENZO adaptive mesh refinement code. The field-matter decoupling is achieved through a sink particle treatment, which is needed to follow the protostell"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.5739","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":"2026-05-18T02:01:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b0cwcd7v14t0q8RK9DRMDDJU09g2WEZZ6emPDug35MnCagqaGPY+0DklXjES6varCjHOON4x95s8tCoEm6yHBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T03:07:11.652151Z"},"content_sha256":"151dd06bd95e8207f7f876f68698c0ae2bd0acf8790165f67d18566abc18bf36","schema_version":"1.0","event_id":"sha256:151dd06bd95e8207f7f876f68698c0ae2bd0acf8790165f67d18566abc18bf36"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NEQYV4VJHNX5AOOUANRQHQX7O3/bundle.json","state_url":"https://pith.science/pith/NEQYV4VJHNX5AOOUANRQHQX7O3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NEQYV4VJHNX5AOOUANRQHQX7O3/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":"2026-06-11T03:07:11Z","links":{"resolver":"https://pith.science/pith/NEQYV4VJHNX5AOOUANRQHQX7O3","bundle":"https://pith.science/pith/NEQYV4VJHNX5AOOUANRQHQX7O3/bundle.json","state":"https://pith.science/pith/NEQYV4VJHNX5AOOUANRQHQX7O3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NEQYV4VJHNX5AOOUANRQHQX7O3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:NEQYV4VJHNX5AOOUANRQHQX7O3","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":"b00bec4abebdf8200fef4a9b67b1a306e5175c5739524cdaac2548858fc80197","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-05-28T21:11:05Z","title_canon_sha256":"7edffbc3034a177fab622728afed7492d519aac9c3345c67595aefe19b4cf255"},"schema_version":"1.0","source":{"id":"1105.5739","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.5739","created_at":"2026-05-18T02:01:46Z"},{"alias_kind":"arxiv_version","alias_value":"1105.5739v1","created_at":"2026-05-18T02:01:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.5739","created_at":"2026-05-18T02:01:46Z"},{"alias_kind":"pith_short_12","alias_value":"NEQYV4VJHNX5","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"NEQYV4VJHNX5AOOU","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"NEQYV4VJ","created_at":"2026-05-18T12:26:37Z"}],"graph_snapshots":[{"event_id":"sha256:151dd06bd95e8207f7f876f68698c0ae2bd0acf8790165f67d18566abc18bf36","target":"graph","created_at":"2026-05-18T02:01:46Z","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":"Stars form in dense cores of magnetized molecular clouds. If the magnetic flux threading the cores is dragged into the stars, the stellar field would be orders of magnitude stronger than observed. This well-known \"magnetic flux problem\" demands that most of the core magnetic flux be decoupled from the matter that enters the star. We carry out the first exploration of what happens to the decoupled magnetic flux in 3D, using an MHD version of the ENZO adaptive mesh refinement code. The field-matter decoupling is achieved through a sink particle treatment, which is needed to follow the protostell","authors_text":"(2) NAOJ, (3) Academia Sinica), Bo Zhao (1), Fumitaka Nakamura (2), Hsien Shang (3) ((1) University of Virginia, Ruben Krasnopolsky (3), Zhi-Yun Li (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-05-28T21:11:05Z","title":"Magnetic Flux Expulsion in Star Formation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.5739","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:d6bded824aef8cae2a75d8d5a97b436599aa3a64d8e69d53165a266c095b2a1a","target":"record","created_at":"2026-05-18T02:01:46Z","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":"b00bec4abebdf8200fef4a9b67b1a306e5175c5739524cdaac2548858fc80197","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-05-28T21:11:05Z","title_canon_sha256":"7edffbc3034a177fab622728afed7492d519aac9c3345c67595aefe19b4cf255"},"schema_version":"1.0","source":{"id":"1105.5739","kind":"arxiv","version":1}},"canonical_sha256":"69218af2a93b6fd039d4036303c2ff76ddf2af2df058e6bc39e9fcdbb3c91557","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"69218af2a93b6fd039d4036303c2ff76ddf2af2df058e6bc39e9fcdbb3c91557","first_computed_at":"2026-05-18T02:01:46.749073Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:46.749073Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9IU26FzaFs6WezBodXtNCkaqrwvHhJ/LX85ACDH4k7UxqEbPIV6i8XzdyRmV2E7XnorYU078wJ9aI03XxUTRDA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:46.749847Z","signed_message":"canonical_sha256_bytes"},"source_id":"1105.5739","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d6bded824aef8cae2a75d8d5a97b436599aa3a64d8e69d53165a266c095b2a1a","sha256:151dd06bd95e8207f7f876f68698c0ae2bd0acf8790165f67d18566abc18bf36"],"state_sha256":"4ce16f665499bb63590281e7ce63bb3f11eee7041d4bceb0bafcfe5bd104718a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f4KZzea5j+QWFQ1opj10IEJdWQkIyqD3ROSskkcCb8GB5U259CBOXZYUITM9KhB4BSU9DSto9bDiDBTavrLqDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T03:07:11.656182Z","bundle_sha256":"1b612716d438243e82a3444a36c72319057aecc54a1c119a74774813196764c3"}}