{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:ACAKYP6DRQ657WMVUOYSUF2HFY","short_pith_number":"pith:ACAKYP6D","canonical_record":{"source":{"id":"1308.2754","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-08-13T04:53:48Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"1cfb86b63b581361d388acc436de4faef3ae04683c9ad2cfecd28668ab887af2","abstract_canon_sha256":"06daf3523004af62d1830f2829e3c7ac879ba2ef948b827a2ab34ab1588b2bc8"},"schema_version":"1.0"},"canonical_sha256":"0080ac3fc38c3ddfd995a3b12a17472e0a2d20bdeb866ce2bb09550adfa8d872","source":{"kind":"arxiv","id":"1308.2754","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.2754","created_at":"2026-05-18T01:48:16Z"},{"alias_kind":"arxiv_version","alias_value":"1308.2754v1","created_at":"2026-05-18T01:48:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.2754","created_at":"2026-05-18T01:48:16Z"},{"alias_kind":"pith_short_12","alias_value":"ACAKYP6DRQ65","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"ACAKYP6DRQ657WMV","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"ACAKYP6D","created_at":"2026-05-18T12:27:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:ACAKYP6DRQ657WMVUOYSUF2HFY","target":"record","payload":{"canonical_record":{"source":{"id":"1308.2754","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-08-13T04:53:48Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"1cfb86b63b581361d388acc436de4faef3ae04683c9ad2cfecd28668ab887af2","abstract_canon_sha256":"06daf3523004af62d1830f2829e3c7ac879ba2ef948b827a2ab34ab1588b2bc8"},"schema_version":"1.0"},"canonical_sha256":"0080ac3fc38c3ddfd995a3b12a17472e0a2d20bdeb866ce2bb09550adfa8d872","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:48:16.049764Z","signature_b64":"EuaAUu3UJxxtIo/K0BZwhdQbT9pqdJiZJbR5EM2hOpBdOv3oVNqsd093nzUBp6+r66b+L99OMdO+rjX2jt10DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0080ac3fc38c3ddfd995a3b12a17472e0a2d20bdeb866ce2bb09550adfa8d872","last_reissued_at":"2026-05-18T01:48:16.049032Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:48:16.049032Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1308.2754","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":"2026-05-18T01:48:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cG80mGeuk3csjCBa4/CocFPD5KPhZsffqJ5SJzzLt7Ozr1Mq1LGCS5QgP9BPVIuy4PpBJ6Lm6PVVFl2pK9+FAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T03:43:42.123133Z"},"content_sha256":"d324d240ac5153233cc3050c481ed018efd84d28e408de2bbae92ca3dcc4fb88","schema_version":"1.0","event_id":"sha256:d324d240ac5153233cc3050c481ed018efd84d28e408de2bbae92ca3dcc4fb88"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:ACAKYP6DRQ657WMVUOYSUF2HFY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Formation of Population III Stars in Gas Accretion Stage: Effects of Magnetic Fields","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Kentaro Doi, Masahiro N. Machida","submitted_at":"2013-08-13T04:53:48Z","abstract_excerpt":"The formation of Population III stars is investigated using resistive magnetohydrodynamic simulations. Starting from a magnetized primordial prestellar cloud, we calculate the cloud evolution several hundreds of years after first protostar formation, resolving the protostellar radius. When the natal minihalo field strength is weaker than B \\lesssim 10^-13 (n/1 cm^-3)^-2/3 G (n is the hydrogen number density), magnetic effects can be ignored. In this case, fragmentation occurs frequently and a stellar cluster forms, in which stellar mergers and mass exchange between protostars contribute to the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.2754","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":"2026-05-18T01:48:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lNxLh52bcXBCC30IeDuXguGH3X0+ewURSBo4aheztMuA4iWNX445glSVWa4XH3CBE4FGesItGYI7690jkIEjAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T03:43:42.123512Z"},"content_sha256":"c3413fa46ada310480005e36e291b6ab77e1d31521ff592f0b9e8124bea72d00","schema_version":"1.0","event_id":"sha256:c3413fa46ada310480005e36e291b6ab77e1d31521ff592f0b9e8124bea72d00"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ACAKYP6DRQ657WMVUOYSUF2HFY/bundle.json","state_url":"https://pith.science/pith/ACAKYP6DRQ657WMVUOYSUF2HFY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ACAKYP6DRQ657WMVUOYSUF2HFY/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":"2026-06-03T03:43:42Z","links":{"resolver":"https://pith.science/pith/ACAKYP6DRQ657WMVUOYSUF2HFY","bundle":"https://pith.science/pith/ACAKYP6DRQ657WMVUOYSUF2HFY/bundle.json","state":"https://pith.science/pith/ACAKYP6DRQ657WMVUOYSUF2HFY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ACAKYP6DRQ657WMVUOYSUF2HFY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:ACAKYP6DRQ657WMVUOYSUF2HFY","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":"06daf3523004af62d1830f2829e3c7ac879ba2ef948b827a2ab34ab1588b2bc8","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-08-13T04:53:48Z","title_canon_sha256":"1cfb86b63b581361d388acc436de4faef3ae04683c9ad2cfecd28668ab887af2"},"schema_version":"1.0","source":{"id":"1308.2754","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.2754","created_at":"2026-05-18T01:48:16Z"},{"alias_kind":"arxiv_version","alias_value":"1308.2754v1","created_at":"2026-05-18T01:48:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.2754","created_at":"2026-05-18T01:48:16Z"},{"alias_kind":"pith_short_12","alias_value":"ACAKYP6DRQ65","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"ACAKYP6DRQ657WMV","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"ACAKYP6D","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:c3413fa46ada310480005e36e291b6ab77e1d31521ff592f0b9e8124bea72d00","target":"graph","created_at":"2026-05-18T01:48:16Z","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":"The formation of Population III stars is investigated using resistive magnetohydrodynamic simulations. Starting from a magnetized primordial prestellar cloud, we calculate the cloud evolution several hundreds of years after first protostar formation, resolving the protostellar radius. When the natal minihalo field strength is weaker than B \\lesssim 10^-13 (n/1 cm^-3)^-2/3 G (n is the hydrogen number density), magnetic effects can be ignored. In this case, fragmentation occurs frequently and a stellar cluster forms, in which stellar mergers and mass exchange between protostars contribute to the","authors_text":"Kentaro Doi, Masahiro N. Machida","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-08-13T04:53:48Z","title":"The Formation of Population III Stars in Gas Accretion Stage: Effects of Magnetic Fields"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.2754","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:d324d240ac5153233cc3050c481ed018efd84d28e408de2bbae92ca3dcc4fb88","target":"record","created_at":"2026-05-18T01:48:16Z","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":"06daf3523004af62d1830f2829e3c7ac879ba2ef948b827a2ab34ab1588b2bc8","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-08-13T04:53:48Z","title_canon_sha256":"1cfb86b63b581361d388acc436de4faef3ae04683c9ad2cfecd28668ab887af2"},"schema_version":"1.0","source":{"id":"1308.2754","kind":"arxiv","version":1}},"canonical_sha256":"0080ac3fc38c3ddfd995a3b12a17472e0a2d20bdeb866ce2bb09550adfa8d872","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0080ac3fc38c3ddfd995a3b12a17472e0a2d20bdeb866ce2bb09550adfa8d872","first_computed_at":"2026-05-18T01:48:16.049032Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:16.049032Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EuaAUu3UJxxtIo/K0BZwhdQbT9pqdJiZJbR5EM2hOpBdOv3oVNqsd093nzUBp6+r66b+L99OMdO+rjX2jt10DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:16.049764Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.2754","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d324d240ac5153233cc3050c481ed018efd84d28e408de2bbae92ca3dcc4fb88","sha256:c3413fa46ada310480005e36e291b6ab77e1d31521ff592f0b9e8124bea72d00"],"state_sha256":"3ad608d2b6c299d228c888c1a5a252b1be1b0b422bb55d5f46fd539949b93681"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RY3s4Ji1wi2Pc69r2yocxXpIzKsAaNRQTmKoY0wcb6dy1iaLLi07ISOJfuGQ5glxsgGARRD7TB3pFviqiV11Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T03:43:42.125621Z","bundle_sha256":"06d70e9e4a7890ef445a338081c688b43d986d3f5907bc974c21cfeebd4c5ef0"}}