{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:XZVHQLQYB2CKBPVAELB55XBFUT","short_pith_number":"pith:XZVHQLQY","canonical_record":{"source":{"id":"1208.4529","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-08-22T15:27:12Z","cross_cats_sorted":["physics.plasm-ph"],"title_canon_sha256":"05f5a270c3a4a824df324c00302371cf5deaa8651b57ac4ab6beefb2751d6d78","abstract_canon_sha256":"966f6ea22dc21729780f1999deab3faa5b34534d1a6d6cc3ebdec82205a3db41"},"schema_version":"1.0"},"canonical_sha256":"be6a782e180e84a0bea022c3dedc25a4e6e81f59906274c667bd32560081b08b","source":{"kind":"arxiv","id":"1208.4529","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.4529","created_at":"2026-05-18T03:07:03Z"},{"alias_kind":"arxiv_version","alias_value":"1208.4529v2","created_at":"2026-05-18T03:07:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.4529","created_at":"2026-05-18T03:07:03Z"},{"alias_kind":"pith_short_12","alias_value":"XZVHQLQYB2CK","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"XZVHQLQYB2CKBPVA","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"XZVHQLQY","created_at":"2026-05-18T12:27:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:XZVHQLQYB2CKBPVAELB55XBFUT","target":"record","payload":{"canonical_record":{"source":{"id":"1208.4529","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-08-22T15:27:12Z","cross_cats_sorted":["physics.plasm-ph"],"title_canon_sha256":"05f5a270c3a4a824df324c00302371cf5deaa8651b57ac4ab6beefb2751d6d78","abstract_canon_sha256":"966f6ea22dc21729780f1999deab3faa5b34534d1a6d6cc3ebdec82205a3db41"},"schema_version":"1.0"},"canonical_sha256":"be6a782e180e84a0bea022c3dedc25a4e6e81f59906274c667bd32560081b08b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:07:03.929574Z","signature_b64":"Gtjm/wUpz5RoRU/MKUJ8I8fDGT2GQqjYhRVSEOzLj78+dE4xN+lWM8hybEFwMrrVEAGK/uafEVv5/OxnnpGLDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"be6a782e180e84a0bea022c3dedc25a4e6e81f59906274c667bd32560081b08b","last_reissued_at":"2026-05-18T03:07:03.929077Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:07:03.929077Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1208.4529","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":"2026-05-18T03:07:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lA/2sE4QSjjH5DOedNu31QYtjClpTA1ebbu3JZrGizpna613VLRoWiRiBDvtv4RwkojnjZ9VxCVW9+pYRCvuDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:09:51.691721Z"},"content_sha256":"8076a24b45fd1306a083c9775d6f3349e5448e903c9fa9e556bf69a8b26c0e1e","schema_version":"1.0","event_id":"sha256:8076a24b45fd1306a083c9775d6f3349e5448e903c9fa9e556bf69a8b26c0e1e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:XZVHQLQYB2CKBPVAELB55XBFUT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The kinetic helicity needed to drive large-scale dynamos","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.plasm-ph"],"primary_cat":"astro-ph.SR","authors_text":"Axel Brandenburg, Simon Candelaresi","submitted_at":"2012-08-22T15:27:12Z","abstract_excerpt":"Magnetic field generation on scales large compared with the scale of the turbulent eddies is known to be possible via the so-called $\\alpha$ effect when the turbulence is helical and if the domain is large enough for the $\\alpha$ effect to dominate over turbulent diffusion. Using three-dimensional turbulence simulations, we show that the energy of the resulting mean magnetic field of the saturated state increases linearly with the product of normalized helicity and the ratio of domain scale to eddy scale, provided this product exceeds a critical value of around unity. This implies that large-s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.4529","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":"2026-05-18T03:07:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"epD3sadYQe7/A0QLI1wUW0XQPivlYXw0sAYU24FA5FoZ7Eqb2uMmlxrUmITEyoagvHAwtKtvjYvnTYTLvSHbBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:09:51.692436Z"},"content_sha256":"d7f08e0dae9726a70a3a21edc0cb4ccaa1f20d2d9ee6dae0dc8c607c99b0e0f7","schema_version":"1.0","event_id":"sha256:d7f08e0dae9726a70a3a21edc0cb4ccaa1f20d2d9ee6dae0dc8c607c99b0e0f7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XZVHQLQYB2CKBPVAELB55XBFUT/bundle.json","state_url":"https://pith.science/pith/XZVHQLQYB2CKBPVAELB55XBFUT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XZVHQLQYB2CKBPVAELB55XBFUT/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":"2026-05-25T16:09:51Z","links":{"resolver":"https://pith.science/pith/XZVHQLQYB2CKBPVAELB55XBFUT","bundle":"https://pith.science/pith/XZVHQLQYB2CKBPVAELB55XBFUT/bundle.json","state":"https://pith.science/pith/XZVHQLQYB2CKBPVAELB55XBFUT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XZVHQLQYB2CKBPVAELB55XBFUT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:XZVHQLQYB2CKBPVAELB55XBFUT","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":"966f6ea22dc21729780f1999deab3faa5b34534d1a6d6cc3ebdec82205a3db41","cross_cats_sorted":["physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-08-22T15:27:12Z","title_canon_sha256":"05f5a270c3a4a824df324c00302371cf5deaa8651b57ac4ab6beefb2751d6d78"},"schema_version":"1.0","source":{"id":"1208.4529","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.4529","created_at":"2026-05-18T03:07:03Z"},{"alias_kind":"arxiv_version","alias_value":"1208.4529v2","created_at":"2026-05-18T03:07:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.4529","created_at":"2026-05-18T03:07:03Z"},{"alias_kind":"pith_short_12","alias_value":"XZVHQLQYB2CK","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"XZVHQLQYB2CKBPVA","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"XZVHQLQY","created_at":"2026-05-18T12:27:27Z"}],"graph_snapshots":[{"event_id":"sha256:d7f08e0dae9726a70a3a21edc0cb4ccaa1f20d2d9ee6dae0dc8c607c99b0e0f7","target":"graph","created_at":"2026-05-18T03:07:03Z","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":"Magnetic field generation on scales large compared with the scale of the turbulent eddies is known to be possible via the so-called $\\alpha$ effect when the turbulence is helical and if the domain is large enough for the $\\alpha$ effect to dominate over turbulent diffusion. Using three-dimensional turbulence simulations, we show that the energy of the resulting mean magnetic field of the saturated state increases linearly with the product of normalized helicity and the ratio of domain scale to eddy scale, provided this product exceeds a critical value of around unity. This implies that large-s","authors_text":"Axel Brandenburg, Simon Candelaresi","cross_cats":["physics.plasm-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-08-22T15:27:12Z","title":"The kinetic helicity needed to drive large-scale dynamos"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.4529","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":"sha256:8076a24b45fd1306a083c9775d6f3349e5448e903c9fa9e556bf69a8b26c0e1e","target":"record","created_at":"2026-05-18T03:07:03Z","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":"966f6ea22dc21729780f1999deab3faa5b34534d1a6d6cc3ebdec82205a3db41","cross_cats_sorted":["physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-08-22T15:27:12Z","title_canon_sha256":"05f5a270c3a4a824df324c00302371cf5deaa8651b57ac4ab6beefb2751d6d78"},"schema_version":"1.0","source":{"id":"1208.4529","kind":"arxiv","version":2}},"canonical_sha256":"be6a782e180e84a0bea022c3dedc25a4e6e81f59906274c667bd32560081b08b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"be6a782e180e84a0bea022c3dedc25a4e6e81f59906274c667bd32560081b08b","first_computed_at":"2026-05-18T03:07:03.929077Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:07:03.929077Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Gtjm/wUpz5RoRU/MKUJ8I8fDGT2GQqjYhRVSEOzLj78+dE4xN+lWM8hybEFwMrrVEAGK/uafEVv5/OxnnpGLDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:07:03.929574Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.4529","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8076a24b45fd1306a083c9775d6f3349e5448e903c9fa9e556bf69a8b26c0e1e","sha256:d7f08e0dae9726a70a3a21edc0cb4ccaa1f20d2d9ee6dae0dc8c607c99b0e0f7"],"state_sha256":"46a1081d1247f83870b6fc37702517c705c716e78945423bcce43e170947695f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7tMMUd5mF3WbhJw8Sm/Nx31bYmlcJ6IwSf1rPVO83s9vJcBVZcGkkNRXxHNzke+jm22Ft5pv9fpeiysAz1DVAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T16:09:51.696114Z","bundle_sha256":"1b97436bcc6422d54d91f2554bd5042d16845efe79e68c35b224243251c4a61e"}}