{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:UKRUERLP5MN3HE4P6J2L4R7Y5D","short_pith_number":"pith:UKRUERLP","canonical_record":{"source":{"id":"astro-ph/0008454","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-08-29T13:56:49Z","cross_cats_sorted":[],"title_canon_sha256":"ed62390446f65d8aaeaab705a25adf7273cf3ecf3baa5963e10738bcf5f3e0b3","abstract_canon_sha256":"cb88445ff0ab6e9363f0e04312a44c50d1e2a25b74abe5f4866a28dbb30bf30a"},"schema_version":"1.0"},"canonical_sha256":"a2a342456feb1bb3938ff274be47f8e8fde97b090c5208af88acc50432ca517e","source":{"kind":"arxiv","id":"astro-ph/0008454","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0008454","created_at":"2026-07-04T15:22:55Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0008454v1","created_at":"2026-07-04T15:22:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0008454","created_at":"2026-07-04T15:22:55Z"},{"alias_kind":"pith_short_12","alias_value":"UKRUERLP5MN3","created_at":"2026-07-04T15:22:55Z"},{"alias_kind":"pith_short_16","alias_value":"UKRUERLP5MN3HE4P","created_at":"2026-07-04T15:22:55Z"},{"alias_kind":"pith_short_8","alias_value":"UKRUERLP","created_at":"2026-07-04T15:22:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:UKRUERLP5MN3HE4P6J2L4R7Y5D","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0008454","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-08-29T13:56:49Z","cross_cats_sorted":[],"title_canon_sha256":"ed62390446f65d8aaeaab705a25adf7273cf3ecf3baa5963e10738bcf5f3e0b3","abstract_canon_sha256":"cb88445ff0ab6e9363f0e04312a44c50d1e2a25b74abe5f4866a28dbb30bf30a"},"schema_version":"1.0"},"canonical_sha256":"a2a342456feb1bb3938ff274be47f8e8fde97b090c5208af88acc50432ca517e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:22:55.694136Z","signature_b64":"BrIgggD1qTToMLAO3RnBmAp94+mP4ib25eLHVAKeis0E6oUK5BqZ3HJqc+sfNae7+ga8XpAXm2nM9Uex5o6xAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a2a342456feb1bb3938ff274be47f8e8fde97b090c5208af88acc50432ca517e","last_reissued_at":"2026-07-04T15:22:55.693733Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:22:55.693733Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0008454","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":"2026-07-04T15:22:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"85aMZ8NPGbrWLLh9eOSjSOj8wtfnQU+yYTWdiiq5XhbE6JZ7dz7butrDj46pmOTbMrGodqPx+uxAF/aRmqifBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T13:06:03.156879Z"},"content_sha256":"0c4399b8f4362b3cd2ee0ac12cd3e8d204c4d0f990689d91d8495f912cc72f35","schema_version":"1.0","event_id":"sha256:0c4399b8f4362b3cd2ee0ac12cd3e8d204c4d0f990689d91d8495f912cc72f35"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:UKRUERLP5MN3HE4P6J2L4R7Y5D","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Density, Velocity, and Magnetic Field Structure in Turbulent Molecular Cloud Models","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"2), (2) ITP, (3) U. Illinois), Charles F. Gammie (3) ((1) U. Maryland, Eve C. Ostriker (1, James M. Stone (1)","submitted_at":"2000-08-29T13:56:49Z","abstract_excerpt":"We use 3D numerical MHD simulations to follow the evolution of cold, turbulent, gaseous systems with parameters representing GMC conditions. We study three cloud simulations with varying mean magnetic fields, but identical initial velocity fields. We show that turbulent energy is reduced by a factor two after 0.4-0.8 flow crossing times (2-4 Myr), and that the magnetically supercritical cloud models collapse after ~6 Myr, while the subcritical cloud does not collapse. We compare density, velocity, and magnetic field structure in three sets of snapshots with matched Mach numbers. The volume and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0008454","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/0008454/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":"2026-07-04T15:22:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+pkbIast3jU7ik2TUGpeGuUeDqerdvqmPIF7+RJUys/h84Mt+pz61CrhjMd3HC0nq4uE3r4iALU1cZAmMtgGBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T13:06:03.157389Z"},"content_sha256":"b630af61a9af76b8f57c108b7b4f13dae9e78cfae0c1d34f781a53ff9b634b96","schema_version":"1.0","event_id":"sha256:b630af61a9af76b8f57c108b7b4f13dae9e78cfae0c1d34f781a53ff9b634b96"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UKRUERLP5MN3HE4P6J2L4R7Y5D/bundle.json","state_url":"https://pith.science/pith/UKRUERLP5MN3HE4P6J2L4R7Y5D/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UKRUERLP5MN3HE4P6J2L4R7Y5D/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":"2026-08-15T13:06:03Z","links":{"resolver":"https://pith.science/pith/UKRUERLP5MN3HE4P6J2L4R7Y5D","bundle":"https://pith.science/pith/UKRUERLP5MN3HE4P6J2L4R7Y5D/bundle.json","state":"https://pith.science/pith/UKRUERLP5MN3HE4P6J2L4R7Y5D/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UKRUERLP5MN3HE4P6J2L4R7Y5D/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:UKRUERLP5MN3HE4P6J2L4R7Y5D","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":"cb88445ff0ab6e9363f0e04312a44c50d1e2a25b74abe5f4866a28dbb30bf30a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-08-29T13:56:49Z","title_canon_sha256":"ed62390446f65d8aaeaab705a25adf7273cf3ecf3baa5963e10738bcf5f3e0b3"},"schema_version":"1.0","source":{"id":"astro-ph/0008454","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0008454","created_at":"2026-07-04T15:22:55Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0008454v1","created_at":"2026-07-04T15:22:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0008454","created_at":"2026-07-04T15:22:55Z"},{"alias_kind":"pith_short_12","alias_value":"UKRUERLP5MN3","created_at":"2026-07-04T15:22:55Z"},{"alias_kind":"pith_short_16","alias_value":"UKRUERLP5MN3HE4P","created_at":"2026-07-04T15:22:55Z"},{"alias_kind":"pith_short_8","alias_value":"UKRUERLP","created_at":"2026-07-04T15:22:55Z"}],"graph_snapshots":[{"event_id":"sha256:b630af61a9af76b8f57c108b7b4f13dae9e78cfae0c1d34f781a53ff9b634b96","target":"graph","created_at":"2026-07-04T15:22:55Z","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/0008454/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We use 3D numerical MHD simulations to follow the evolution of cold, turbulent, gaseous systems with parameters representing GMC conditions. We study three cloud simulations with varying mean magnetic fields, but identical initial velocity fields. We show that turbulent energy is reduced by a factor two after 0.4-0.8 flow crossing times (2-4 Myr), and that the magnetically supercritical cloud models collapse after ~6 Myr, while the subcritical cloud does not collapse. We compare density, velocity, and magnetic field structure in three sets of snapshots with matched Mach numbers. The volume and","authors_text":"2), (2) ITP, (3) U. Illinois), Charles F. Gammie (3) ((1) U. Maryland, Eve C. Ostriker (1, James M. Stone (1)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-08-29T13:56:49Z","title":"Density, Velocity, and Magnetic Field Structure in Turbulent Molecular Cloud Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0008454","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":"sha256:0c4399b8f4362b3cd2ee0ac12cd3e8d204c4d0f990689d91d8495f912cc72f35","target":"record","created_at":"2026-07-04T15:22:55Z","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":"cb88445ff0ab6e9363f0e04312a44c50d1e2a25b74abe5f4866a28dbb30bf30a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-08-29T13:56:49Z","title_canon_sha256":"ed62390446f65d8aaeaab705a25adf7273cf3ecf3baa5963e10738bcf5f3e0b3"},"schema_version":"1.0","source":{"id":"astro-ph/0008454","kind":"arxiv","version":1}},"canonical_sha256":"a2a342456feb1bb3938ff274be47f8e8fde97b090c5208af88acc50432ca517e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a2a342456feb1bb3938ff274be47f8e8fde97b090c5208af88acc50432ca517e","first_computed_at":"2026-07-04T15:22:55.693733Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:22:55.693733Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BrIgggD1qTToMLAO3RnBmAp94+mP4ib25eLHVAKeis0E6oUK5BqZ3HJqc+sfNae7+ga8XpAXm2nM9Uex5o6xAQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:22:55.694136Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0008454","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0c4399b8f4362b3cd2ee0ac12cd3e8d204c4d0f990689d91d8495f912cc72f35","sha256:b630af61a9af76b8f57c108b7b4f13dae9e78cfae0c1d34f781a53ff9b634b96"],"state_sha256":"b4d49123d5d1c7ff5ae4f4014bc983c9d7aa4f6674db61723baf75e4fe8ca7af"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g+zZe7WfRN8jdrX/0aEUzPwYYhvYfiaXtx7cQtRO4rO6qnNwOhyXZjVTifr5Q3jADBEi59AgCf4tkpWD44DkDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T13:06:03.161285Z","bundle_sha256":"2df376eb5fde1109c642d7c66bbca9441cb0cbb84db70638bdcff7862810c39b"}}