{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:VGB7VFTMIKPSK2MAOTUYHPNNWK","short_pith_number":"pith:VGB7VFTM","canonical_record":{"source":{"id":"1403.2562","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-03-11T13:01:52Z","cross_cats_sorted":[],"title_canon_sha256":"79e52d891d21b38b5d6a42ecd3f28af406f7ea734e02296b75d2718327c541fa","abstract_canon_sha256":"783bc014ecb875c2ffeddbb7a6aaf95f1762783d18c30946db4106578e43c6a6"},"schema_version":"1.0"},"canonical_sha256":"a983fa966c429f25698074e983bdadb2864a97ea7459a49496cfe84a0fb03e45","source":{"kind":"arxiv","id":"1403.2562","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.2562","created_at":"2026-05-18T01:44:08Z"},{"alias_kind":"arxiv_version","alias_value":"1403.2562v2","created_at":"2026-05-18T01:44:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.2562","created_at":"2026-05-18T01:44:08Z"},{"alias_kind":"pith_short_12","alias_value":"VGB7VFTMIKPS","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"VGB7VFTMIKPSK2MA","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"VGB7VFTM","created_at":"2026-05-18T12:28:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:VGB7VFTMIKPSK2MAOTUYHPNNWK","target":"record","payload":{"canonical_record":{"source":{"id":"1403.2562","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-03-11T13:01:52Z","cross_cats_sorted":[],"title_canon_sha256":"79e52d891d21b38b5d6a42ecd3f28af406f7ea734e02296b75d2718327c541fa","abstract_canon_sha256":"783bc014ecb875c2ffeddbb7a6aaf95f1762783d18c30946db4106578e43c6a6"},"schema_version":"1.0"},"canonical_sha256":"a983fa966c429f25698074e983bdadb2864a97ea7459a49496cfe84a0fb03e45","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:44:08.963781Z","signature_b64":"wtSE9gZq152z8Gib7lY42tzZVRyvVz7YTXy+OrAcmIKwwkalE0RjQKgLxJHVmLAmS6fcXC8TBE1hc/OvUusXAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a983fa966c429f25698074e983bdadb2864a97ea7459a49496cfe84a0fb03e45","last_reissued_at":"2026-05-18T01:44:08.963134Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:44:08.963134Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1403.2562","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:44:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G4kpHSVFdNpzfCGWy+U1ZUWaVfbte6GER4a5k7IMXblcwoooOdvSqy0iGQS3T6WRI9RIJN//RyYLuHAfp3aKDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:13:34.416522Z"},"content_sha256":"28be8ad46c349632e6be4d0a3f61680fb027d395f13d836eaecde46e7a3bb33b","schema_version":"1.0","event_id":"sha256:28be8ad46c349632e6be4d0a3f61680fb027d395f13d836eaecde46e7a3bb33b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:VGB7VFTMIKPSK2MAOTUYHPNNWK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Non-linear galactic dynamos: A toolbox","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Anvar Shukurov, Kandaswamy Subramanian, Katherine Stoker, Luke Chamandy","submitted_at":"2014-03-11T13:01:52Z","abstract_excerpt":"We compare various models and approximations for non-linear mean-field dynamos in disc galaxies to assess their applicability and accuracy, and thus to suggest a set of simple solutions suitable to model the large-scale galactic magnetic fields in various contexts. The dynamo saturation mechanisms considered are the magnetic helicity balance involving helicity fluxes (the dynamical $\\alpha$-quenching) and an algebraic $\\alpha$-quenching. The non-linear solutions are then compared with the marginal kinematic and asymptotic solutions. We also discuss the accuracy of the no-$z$ approximation. Alt"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.2562","kind":"arxiv","version":2},"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":"2026-05-18T01:44:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"32b560Byr7/I+/SDXNe0rEc+tR1TUvIGB8P8ooc1pqDZQBFhD3DPEu3EabA2YgpgJYWODKR8TXrOL2xRqNcrAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:13:34.416866Z"},"content_sha256":"aa1bc5a29deeab2655b7186ed66c0b6caaa843826ee03cf8f58dd5c9a2208ca0","schema_version":"1.0","event_id":"sha256:aa1bc5a29deeab2655b7186ed66c0b6caaa843826ee03cf8f58dd5c9a2208ca0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VGB7VFTMIKPSK2MAOTUYHPNNWK/bundle.json","state_url":"https://pith.science/pith/VGB7VFTMIKPSK2MAOTUYHPNNWK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VGB7VFTMIKPSK2MAOTUYHPNNWK/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":"2026-05-30T22:13:34Z","links":{"resolver":"https://pith.science/pith/VGB7VFTMIKPSK2MAOTUYHPNNWK","bundle":"https://pith.science/pith/VGB7VFTMIKPSK2MAOTUYHPNNWK/bundle.json","state":"https://pith.science/pith/VGB7VFTMIKPSK2MAOTUYHPNNWK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VGB7VFTMIKPSK2MAOTUYHPNNWK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:VGB7VFTMIKPSK2MAOTUYHPNNWK","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":"783bc014ecb875c2ffeddbb7a6aaf95f1762783d18c30946db4106578e43c6a6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-03-11T13:01:52Z","title_canon_sha256":"79e52d891d21b38b5d6a42ecd3f28af406f7ea734e02296b75d2718327c541fa"},"schema_version":"1.0","source":{"id":"1403.2562","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.2562","created_at":"2026-05-18T01:44:08Z"},{"alias_kind":"arxiv_version","alias_value":"1403.2562v2","created_at":"2026-05-18T01:44:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.2562","created_at":"2026-05-18T01:44:08Z"},{"alias_kind":"pith_short_12","alias_value":"VGB7VFTMIKPS","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"VGB7VFTMIKPSK2MA","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"VGB7VFTM","created_at":"2026-05-18T12:28:52Z"}],"graph_snapshots":[{"event_id":"sha256:aa1bc5a29deeab2655b7186ed66c0b6caaa843826ee03cf8f58dd5c9a2208ca0","target":"graph","created_at":"2026-05-18T01:44:08Z","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 compare various models and approximations for non-linear mean-field dynamos in disc galaxies to assess their applicability and accuracy, and thus to suggest a set of simple solutions suitable to model the large-scale galactic magnetic fields in various contexts. The dynamo saturation mechanisms considered are the magnetic helicity balance involving helicity fluxes (the dynamical $\\alpha$-quenching) and an algebraic $\\alpha$-quenching. The non-linear solutions are then compared with the marginal kinematic and asymptotic solutions. We also discuss the accuracy of the no-$z$ approximation. Alt","authors_text":"Anvar Shukurov, Kandaswamy Subramanian, Katherine Stoker, Luke Chamandy","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-03-11T13:01:52Z","title":"Non-linear galactic dynamos: A toolbox"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.2562","kind":"arxiv","version":2},"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":"sha256:28be8ad46c349632e6be4d0a3f61680fb027d395f13d836eaecde46e7a3bb33b","target":"record","created_at":"2026-05-18T01:44:08Z","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":"783bc014ecb875c2ffeddbb7a6aaf95f1762783d18c30946db4106578e43c6a6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-03-11T13:01:52Z","title_canon_sha256":"79e52d891d21b38b5d6a42ecd3f28af406f7ea734e02296b75d2718327c541fa"},"schema_version":"1.0","source":{"id":"1403.2562","kind":"arxiv","version":2}},"canonical_sha256":"a983fa966c429f25698074e983bdadb2864a97ea7459a49496cfe84a0fb03e45","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a983fa966c429f25698074e983bdadb2864a97ea7459a49496cfe84a0fb03e45","first_computed_at":"2026-05-18T01:44:08.963134Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:44:08.963134Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wtSE9gZq152z8Gib7lY42tzZVRyvVz7YTXy+OrAcmIKwwkalE0RjQKgLxJHVmLAmS6fcXC8TBE1hc/OvUusXAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:44:08.963781Z","signed_message":"canonical_sha256_bytes"},"source_id":"1403.2562","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:28be8ad46c349632e6be4d0a3f61680fb027d395f13d836eaecde46e7a3bb33b","sha256:aa1bc5a29deeab2655b7186ed66c0b6caaa843826ee03cf8f58dd5c9a2208ca0"],"state_sha256":"09f2e59d4fd630ad3795ca786783ffba0aac5678aace491926f7c67f0af17a37"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VX+d88GpVS0AlBA8f9J17cVMJChW7A1sYFfSrm9LFjaAAtBPBj8s6CbpipWoX6Fh+7ByZJE2Omj1MOrHgcdLDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:13:34.418781Z","bundle_sha256":"f7ffd71b84e1493012f922d902d1a759d10fd8975d756cde11616cbfd6ba99c6"}}