{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:3T62LE63RQXCZ5J37733ZH5AX2","short_pith_number":"pith:3T62LE63","canonical_record":{"source":{"id":"1005.4818","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-26T14:01:00Z","cross_cats_sorted":[],"title_canon_sha256":"3b8481db4a806204a5c8aa2ac09f73c5b664fda48337f5447acc48dc8c0b7149","abstract_canon_sha256":"09617a3ca216ef7a4b95289e9d762557496f91d9af051994ed1f2b0cff92c0c5"},"schema_version":"1.0"},"canonical_sha256":"dcfda593db8c2e2cf53bfff7bc9fa0be8374c27950be8a6de68ade4d3236244e","source":{"kind":"arxiv","id":"1005.4818","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.4818","created_at":"2026-05-18T04:33:49Z"},{"alias_kind":"arxiv_version","alias_value":"1005.4818v1","created_at":"2026-05-18T04:33:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.4818","created_at":"2026-05-18T04:33:49Z"},{"alias_kind":"pith_short_12","alias_value":"3T62LE63RQXC","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"3T62LE63RQXCZ5J3","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"3T62LE63","created_at":"2026-05-18T12:26:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:3T62LE63RQXCZ5J37733ZH5AX2","target":"record","payload":{"canonical_record":{"source":{"id":"1005.4818","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-26T14:01:00Z","cross_cats_sorted":[],"title_canon_sha256":"3b8481db4a806204a5c8aa2ac09f73c5b664fda48337f5447acc48dc8c0b7149","abstract_canon_sha256":"09617a3ca216ef7a4b95289e9d762557496f91d9af051994ed1f2b0cff92c0c5"},"schema_version":"1.0"},"canonical_sha256":"dcfda593db8c2e2cf53bfff7bc9fa0be8374c27950be8a6de68ade4d3236244e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:33:49.710706Z","signature_b64":"mL3YJkq0akrUcsGYnOdD3xSJudY+4EzMyUK8NZfheJEWTnaECCuF5mNMq0lRXzi8robalBqbOjTkfE65X/6EDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dcfda593db8c2e2cf53bfff7bc9fa0be8374c27950be8a6de68ade4d3236244e","last_reissued_at":"2026-05-18T04:33:49.710156Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:33:49.710156Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1005.4818","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":"2026-05-18T04:33:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OVMrk5gQUmzq6ZfIZnb+AF4v852KcJA3YNhL2IYlaikU3RPUFRFR55ciQubDcN6acckzWsDv+MtgRSsH9+voDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:20:11.741923Z"},"content_sha256":"807c1b1b6426c3748b3f0e2e27df959353c58374989c57c3bda01fc0fb6def32","schema_version":"1.0","event_id":"sha256:807c1b1b6426c3748b3f0e2e27df959353c58374989c57c3bda01fc0fb6def32"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:3T62LE63RQXCZ5J37733ZH5AX2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Shear-driven and diffusive helicity fluxes in alpha-Omega dynamos","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Axel Brandenburg, Gustavo Guerrero, Piyali Chatterjee","submitted_at":"2010-05-26T14:01:00Z","abstract_excerpt":"We present nonlinear mean-field alpha-Omega dynamo simulations in spherical geometry with simplified profiles of kinematic alpha effect and shear. We take magnetic helicity evolution into account by solving a dynamical equation for the magnetic alpha effect. This gives a consistent description of the quenching mechanism in mean-field dynamo models. The main goal of this work is to explore the effects of this quenching mechanism in solar-like geometry, and in particular to investigate the role of magnetic helicity fluxes, specifically diffusive and Vishniac-Cho (VC) fluxes, at large magnetic Re"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.4818","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":"2026-05-18T04:33:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t+ge3vRAIBtq2zFsL8jjRiKF2jAvB224olHRlkf32XT9QmNKbMUD3zQPkXcA9+2gs2r5p2iRaFzY/tsT9CJCDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:20:11.742621Z"},"content_sha256":"d7eeaf9ba580bf2401f4a3591c7e594a367c627c6741d3d0304f5b3966f8ee37","schema_version":"1.0","event_id":"sha256:d7eeaf9ba580bf2401f4a3591c7e594a367c627c6741d3d0304f5b3966f8ee37"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3T62LE63RQXCZ5J37733ZH5AX2/bundle.json","state_url":"https://pith.science/pith/3T62LE63RQXCZ5J37733ZH5AX2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3T62LE63RQXCZ5J37733ZH5AX2/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":"2026-05-25T22:20:11Z","links":{"resolver":"https://pith.science/pith/3T62LE63RQXCZ5J37733ZH5AX2","bundle":"https://pith.science/pith/3T62LE63RQXCZ5J37733ZH5AX2/bundle.json","state":"https://pith.science/pith/3T62LE63RQXCZ5J37733ZH5AX2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3T62LE63RQXCZ5J37733ZH5AX2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:3T62LE63RQXCZ5J37733ZH5AX2","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":"09617a3ca216ef7a4b95289e9d762557496f91d9af051994ed1f2b0cff92c0c5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-26T14:01:00Z","title_canon_sha256":"3b8481db4a806204a5c8aa2ac09f73c5b664fda48337f5447acc48dc8c0b7149"},"schema_version":"1.0","source":{"id":"1005.4818","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.4818","created_at":"2026-05-18T04:33:49Z"},{"alias_kind":"arxiv_version","alias_value":"1005.4818v1","created_at":"2026-05-18T04:33:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.4818","created_at":"2026-05-18T04:33:49Z"},{"alias_kind":"pith_short_12","alias_value":"3T62LE63RQXC","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"3T62LE63RQXCZ5J3","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"3T62LE63","created_at":"2026-05-18T12:26:03Z"}],"graph_snapshots":[{"event_id":"sha256:d7eeaf9ba580bf2401f4a3591c7e594a367c627c6741d3d0304f5b3966f8ee37","target":"graph","created_at":"2026-05-18T04:33:49Z","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":"We present nonlinear mean-field alpha-Omega dynamo simulations in spherical geometry with simplified profiles of kinematic alpha effect and shear. We take magnetic helicity evolution into account by solving a dynamical equation for the magnetic alpha effect. This gives a consistent description of the quenching mechanism in mean-field dynamo models. The main goal of this work is to explore the effects of this quenching mechanism in solar-like geometry, and in particular to investigate the role of magnetic helicity fluxes, specifically diffusive and Vishniac-Cho (VC) fluxes, at large magnetic Re","authors_text":"Axel Brandenburg, Gustavo Guerrero, Piyali Chatterjee","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-26T14:01:00Z","title":"Shear-driven and diffusive helicity fluxes in alpha-Omega dynamos"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.4818","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":"sha256:807c1b1b6426c3748b3f0e2e27df959353c58374989c57c3bda01fc0fb6def32","target":"record","created_at":"2026-05-18T04:33:49Z","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":"09617a3ca216ef7a4b95289e9d762557496f91d9af051994ed1f2b0cff92c0c5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-26T14:01:00Z","title_canon_sha256":"3b8481db4a806204a5c8aa2ac09f73c5b664fda48337f5447acc48dc8c0b7149"},"schema_version":"1.0","source":{"id":"1005.4818","kind":"arxiv","version":1}},"canonical_sha256":"dcfda593db8c2e2cf53bfff7bc9fa0be8374c27950be8a6de68ade4d3236244e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dcfda593db8c2e2cf53bfff7bc9fa0be8374c27950be8a6de68ade4d3236244e","first_computed_at":"2026-05-18T04:33:49.710156Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:33:49.710156Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mL3YJkq0akrUcsGYnOdD3xSJudY+4EzMyUK8NZfheJEWTnaECCuF5mNMq0lRXzi8robalBqbOjTkfE65X/6EDA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:33:49.710706Z","signed_message":"canonical_sha256_bytes"},"source_id":"1005.4818","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:807c1b1b6426c3748b3f0e2e27df959353c58374989c57c3bda01fc0fb6def32","sha256:d7eeaf9ba580bf2401f4a3591c7e594a367c627c6741d3d0304f5b3966f8ee37"],"state_sha256":"ce079c186a5b5fd518fa771b5618c19f914fccdd00c621a66208e2c0d1b8c842"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KzmTvF4UisPHhSUqBG/zwJZ9DkF9yx1lzkRkxWqRjfmNLybmOORxhbefEExjNzb0q7vdvmkzZ1Oy5EIo7/uaCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T22:20:11.746244Z","bundle_sha256":"8f79286eeb71bd5adc6ecd0c38329e388fb81fde748f1f0eecd10aa4ff79ce07"}}