{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:5QGMSF6ICIFX5HCT2YVILTE53K","short_pith_number":"pith:5QGMSF6I","canonical_record":{"source":{"id":"1409.2512","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-09-08T20:24:59Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"fed3d130a25fa6f9507257aaa707427bafb467de91635dcc5920eaed1a94fd5b","abstract_canon_sha256":"59e0f97617b0b2a2df13db69cc78574007cd0d193cf515f0ba4f0e41d24db3af"},"schema_version":"1.0"},"canonical_sha256":"ec0cc917c8120b7e9c53d62a85cc9ddaa39e252a20cb64c619075571e64660eb","source":{"kind":"arxiv","id":"1409.2512","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.2512","created_at":"2026-05-18T01:42:06Z"},{"alias_kind":"arxiv_version","alias_value":"1409.2512v1","created_at":"2026-05-18T01:42:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.2512","created_at":"2026-05-18T01:42:06Z"},{"alias_kind":"pith_short_12","alias_value":"5QGMSF6ICIFX","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"5QGMSF6ICIFX5HCT","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"5QGMSF6I","created_at":"2026-05-18T12:28:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:5QGMSF6ICIFX5HCT2YVILTE53K","target":"record","payload":{"canonical_record":{"source":{"id":"1409.2512","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-09-08T20:24:59Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"fed3d130a25fa6f9507257aaa707427bafb467de91635dcc5920eaed1a94fd5b","abstract_canon_sha256":"59e0f97617b0b2a2df13db69cc78574007cd0d193cf515f0ba4f0e41d24db3af"},"schema_version":"1.0"},"canonical_sha256":"ec0cc917c8120b7e9c53d62a85cc9ddaa39e252a20cb64c619075571e64660eb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:06.393904Z","signature_b64":"MDVvDpFbQt7rdlq+FlJvTn7MKraBGMCZKU5VopmDI+Hg+U4MjZ6yaswnnaM9InLZBv3+5QYVpjVAw5tJwSjsCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ec0cc917c8120b7e9c53d62a85cc9ddaa39e252a20cb64c619075571e64660eb","last_reissued_at":"2026-05-18T01:42:06.393208Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:06.393208Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1409.2512","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":"2026-05-18T01:42:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"In1IIaCngtOCMRkoRnEVvxMZ++EIbL6jJigPZgsp7HNWwMdZFml2mwGohVsiCUQz9aWB4e0V2cdJwVSCGuZ8AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T08:10:37.228284Z"},"content_sha256":"d30cd41cf3c244537e7c7c010b9ce507d7ab51dcd76774489b1fc4fcab294624","schema_version":"1.0","event_id":"sha256:d30cd41cf3c244537e7c7c010b9ce507d7ab51dcd76774489b1fc4fcab294624"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:5QGMSF6ICIFX5HCT2YVILTE53K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Magnetic Flux Concentration and Zonal Flows in Magnetorotational Instability Turbulence","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.HE","authors_text":"James M. Stone (Princeton), Xue-Ning Bai (CfA)","submitted_at":"2014-09-08T20:24:59Z","abstract_excerpt":"Accretion disks are likely threaded by external vertical magnetic flux, which enhances the level of turbulence via the magnetorotational instability (MRI). Using shearing-box simulations, we find that such external magnetic flux also strongly enhances the amplitude of banded radial density variations known as zonal flows. Moreover, we report that vertical magnetic flux is strongly concentrated toward low-density regions of the zonal flow. Mean vertical magnetic field can be more than doubled in low-density regions, and reduced to nearly zero in high density regions in some cases. In ideal MHD,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.2512","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":"2026-05-18T01:42:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fvYjpkwxVpd6ZAWe/HiChCyWyCgP+nCkBSRKV719t1xiUD0NMXV5cS4Jez/kCTe/jHrMSoi9msAEXvXQpGhJAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T08:10:37.228640Z"},"content_sha256":"ca75e6e0f098aef0fb296b39c1a76d1a7a2cc616a94eab57c066bd9f6c8a4d7d","schema_version":"1.0","event_id":"sha256:ca75e6e0f098aef0fb296b39c1a76d1a7a2cc616a94eab57c066bd9f6c8a4d7d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5QGMSF6ICIFX5HCT2YVILTE53K/bundle.json","state_url":"https://pith.science/pith/5QGMSF6ICIFX5HCT2YVILTE53K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5QGMSF6ICIFX5HCT2YVILTE53K/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":"2026-06-27T08:10:37Z","links":{"resolver":"https://pith.science/pith/5QGMSF6ICIFX5HCT2YVILTE53K","bundle":"https://pith.science/pith/5QGMSF6ICIFX5HCT2YVILTE53K/bundle.json","state":"https://pith.science/pith/5QGMSF6ICIFX5HCT2YVILTE53K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5QGMSF6ICIFX5HCT2YVILTE53K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:5QGMSF6ICIFX5HCT2YVILTE53K","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":"59e0f97617b0b2a2df13db69cc78574007cd0d193cf515f0ba4f0e41d24db3af","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-09-08T20:24:59Z","title_canon_sha256":"fed3d130a25fa6f9507257aaa707427bafb467de91635dcc5920eaed1a94fd5b"},"schema_version":"1.0","source":{"id":"1409.2512","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.2512","created_at":"2026-05-18T01:42:06Z"},{"alias_kind":"arxiv_version","alias_value":"1409.2512v1","created_at":"2026-05-18T01:42:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.2512","created_at":"2026-05-18T01:42:06Z"},{"alias_kind":"pith_short_12","alias_value":"5QGMSF6ICIFX","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"5QGMSF6ICIFX5HCT","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"5QGMSF6I","created_at":"2026-05-18T12:28:14Z"}],"graph_snapshots":[{"event_id":"sha256:ca75e6e0f098aef0fb296b39c1a76d1a7a2cc616a94eab57c066bd9f6c8a4d7d","target":"graph","created_at":"2026-05-18T01:42:06Z","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":"Accretion disks are likely threaded by external vertical magnetic flux, which enhances the level of turbulence via the magnetorotational instability (MRI). Using shearing-box simulations, we find that such external magnetic flux also strongly enhances the amplitude of banded radial density variations known as zonal flows. Moreover, we report that vertical magnetic flux is strongly concentrated toward low-density regions of the zonal flow. Mean vertical magnetic field can be more than doubled in low-density regions, and reduced to nearly zero in high density regions in some cases. In ideal MHD,","authors_text":"James M. Stone (Princeton), Xue-Ning Bai (CfA)","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-09-08T20:24:59Z","title":"Magnetic Flux Concentration and Zonal Flows in Magnetorotational Instability Turbulence"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.2512","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:d30cd41cf3c244537e7c7c010b9ce507d7ab51dcd76774489b1fc4fcab294624","target":"record","created_at":"2026-05-18T01:42:06Z","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":"59e0f97617b0b2a2df13db69cc78574007cd0d193cf515f0ba4f0e41d24db3af","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-09-08T20:24:59Z","title_canon_sha256":"fed3d130a25fa6f9507257aaa707427bafb467de91635dcc5920eaed1a94fd5b"},"schema_version":"1.0","source":{"id":"1409.2512","kind":"arxiv","version":1}},"canonical_sha256":"ec0cc917c8120b7e9c53d62a85cc9ddaa39e252a20cb64c619075571e64660eb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ec0cc917c8120b7e9c53d62a85cc9ddaa39e252a20cb64c619075571e64660eb","first_computed_at":"2026-05-18T01:42:06.393208Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:06.393208Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MDVvDpFbQt7rdlq+FlJvTn7MKraBGMCZKU5VopmDI+Hg+U4MjZ6yaswnnaM9InLZBv3+5QYVpjVAw5tJwSjsCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:06.393904Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.2512","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d30cd41cf3c244537e7c7c010b9ce507d7ab51dcd76774489b1fc4fcab294624","sha256:ca75e6e0f098aef0fb296b39c1a76d1a7a2cc616a94eab57c066bd9f6c8a4d7d"],"state_sha256":"c6b82aaab98d9822444b4dcb9dde1a7ae7c9596c777a994160fb0394a6c3ad9f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SVEUKVkfibg3r58lQ+oA4fuXBDdGWrMOlzc4Mn4pe7C38itzBNLkxEBD4SYyjqM0rka2Zx+LPgcEjxUQ3dFbAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T08:10:37.230451Z","bundle_sha256":"c298e0474322fe1bf0b87f65f85301facf0c95af7baa4d8a94d1e809dd566e65"}}