{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:T5F6HBYKUKTDNMLXKCYZTCE2W4","short_pith_number":"pith:T5F6HBYK","canonical_record":{"source":{"id":"1604.00469","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2016-04-02T07:25:21Z","cross_cats_sorted":["astro-ph.EP","physics.plasm-ph"],"title_canon_sha256":"f8069eed930f7f6fbfb05e465ed531501ce8e670c95bf9b884070d4e9ca7d57d","abstract_canon_sha256":"b4409a64d446b21d4c941fa8300ac5a3a6e78156714d5c5bb6c3beb021add7fc"},"schema_version":"1.0"},"canonical_sha256":"9f4be3870aa2a636b17750b199889ab72654e8f8566cf16235993c36365508fb","source":{"kind":"arxiv","id":"1604.00469","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.00469","created_at":"2026-05-18T01:15:48Z"},{"alias_kind":"arxiv_version","alias_value":"1604.00469v1","created_at":"2026-05-18T01:15:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.00469","created_at":"2026-05-18T01:15:48Z"},{"alias_kind":"pith_short_12","alias_value":"T5F6HBYKUKTD","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"T5F6HBYKUKTDNMLX","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"T5F6HBYK","created_at":"2026-05-18T12:30:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:T5F6HBYKUKTDNMLXKCYZTCE2W4","target":"record","payload":{"canonical_record":{"source":{"id":"1604.00469","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2016-04-02T07:25:21Z","cross_cats_sorted":["astro-ph.EP","physics.plasm-ph"],"title_canon_sha256":"f8069eed930f7f6fbfb05e465ed531501ce8e670c95bf9b884070d4e9ca7d57d","abstract_canon_sha256":"b4409a64d446b21d4c941fa8300ac5a3a6e78156714d5c5bb6c3beb021add7fc"},"schema_version":"1.0"},"canonical_sha256":"9f4be3870aa2a636b17750b199889ab72654e8f8566cf16235993c36365508fb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:15:48.930174Z","signature_b64":"VNeqboVtAhTo/dn/9VMPUnClMAfrg5eKiMtKEGOR2RX6F8mMqoPEwDCxupy+WuOw4JqVIGM//1wBNxwzwEbcAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f4be3870aa2a636b17750b199889ab72654e8f8566cf16235993c36365508fb","last_reissued_at":"2026-05-18T01:15:48.929555Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:15:48.929555Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.00469","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":"2026-05-18T01:15:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CxpPxEPkGCnMkjnRBUvxxvRXJPfxNSWzSm4i5GBpRk6vwzd4/ukBr5Ml+QL2Ee+R2Cg1LmdsoJ8Z4szMVOrTAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T10:29:21.424489Z"},"content_sha256":"d99725aeac3f7ba0d1714d23283c41ccb89aac9e8ae90cbb19ef308d4a58f01e","schema_version":"1.0","event_id":"sha256:d99725aeac3f7ba0d1714d23283c41ccb89aac9e8ae90cbb19ef308d4a58f01e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:T5F6HBYKUKTDNMLXKCYZTCE2W4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fluctuations of electrical conductivity: a new source for astrophysical magnetic fields","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP","physics.plasm-ph"],"primary_cat":"physics.flu-dyn","authors_text":"Alexandros Alexakis, Christophe Gissinger, Francois Petrelis","submitted_at":"2016-04-02T07:25:21Z","abstract_excerpt":"We consider the generation of magnetic field by the flow of a fluid for which the electrical conductivity is nonuniform. A new amplification mechanism is found which leads to dynamo action for flows much simpler than those considered so far. In particular, the fluctuations of the electrical conductivity provide a way to bypass anti-dynamo theorems. For astrophysical objects, we show through three-dimensional global numerical simulations that the temperature-driven fluctuations of the electrical conductivity can amplify an otherwise decaying large scale equatorial dipolar field. This effect cou"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.00469","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":"2026-05-18T01:15:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZzranK7QGjyVi6+tnKSwETlzmQByJIVqh+B9Zx7RKZtUsOEhFEbJKrSO+hiJQHrLHubo8K/iagMCFZ28nk3RBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T10:29:21.424889Z"},"content_sha256":"c4a3a0fea82fd7832934256e89cd044739e3e2b97ff87c7fb50d3fddd5c6efda","schema_version":"1.0","event_id":"sha256:c4a3a0fea82fd7832934256e89cd044739e3e2b97ff87c7fb50d3fddd5c6efda"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T5F6HBYKUKTDNMLXKCYZTCE2W4/bundle.json","state_url":"https://pith.science/pith/T5F6HBYKUKTDNMLXKCYZTCE2W4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T5F6HBYKUKTDNMLXKCYZTCE2W4/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":"2026-05-27T10:29:21Z","links":{"resolver":"https://pith.science/pith/T5F6HBYKUKTDNMLXKCYZTCE2W4","bundle":"https://pith.science/pith/T5F6HBYKUKTDNMLXKCYZTCE2W4/bundle.json","state":"https://pith.science/pith/T5F6HBYKUKTDNMLXKCYZTCE2W4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T5F6HBYKUKTDNMLXKCYZTCE2W4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:T5F6HBYKUKTDNMLXKCYZTCE2W4","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":"b4409a64d446b21d4c941fa8300ac5a3a6e78156714d5c5bb6c3beb021add7fc","cross_cats_sorted":["astro-ph.EP","physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2016-04-02T07:25:21Z","title_canon_sha256":"f8069eed930f7f6fbfb05e465ed531501ce8e670c95bf9b884070d4e9ca7d57d"},"schema_version":"1.0","source":{"id":"1604.00469","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.00469","created_at":"2026-05-18T01:15:48Z"},{"alias_kind":"arxiv_version","alias_value":"1604.00469v1","created_at":"2026-05-18T01:15:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.00469","created_at":"2026-05-18T01:15:48Z"},{"alias_kind":"pith_short_12","alias_value":"T5F6HBYKUKTD","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"T5F6HBYKUKTDNMLX","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"T5F6HBYK","created_at":"2026-05-18T12:30:44Z"}],"graph_snapshots":[{"event_id":"sha256:c4a3a0fea82fd7832934256e89cd044739e3e2b97ff87c7fb50d3fddd5c6efda","target":"graph","created_at":"2026-05-18T01:15:48Z","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 consider the generation of magnetic field by the flow of a fluid for which the electrical conductivity is nonuniform. A new amplification mechanism is found which leads to dynamo action for flows much simpler than those considered so far. In particular, the fluctuations of the electrical conductivity provide a way to bypass anti-dynamo theorems. For astrophysical objects, we show through three-dimensional global numerical simulations that the temperature-driven fluctuations of the electrical conductivity can amplify an otherwise decaying large scale equatorial dipolar field. This effect cou","authors_text":"Alexandros Alexakis, Christophe Gissinger, Francois Petrelis","cross_cats":["astro-ph.EP","physics.plasm-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2016-04-02T07:25:21Z","title":"Fluctuations of electrical conductivity: a new source for astrophysical magnetic fields"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.00469","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:d99725aeac3f7ba0d1714d23283c41ccb89aac9e8ae90cbb19ef308d4a58f01e","target":"record","created_at":"2026-05-18T01:15:48Z","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":"b4409a64d446b21d4c941fa8300ac5a3a6e78156714d5c5bb6c3beb021add7fc","cross_cats_sorted":["astro-ph.EP","physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2016-04-02T07:25:21Z","title_canon_sha256":"f8069eed930f7f6fbfb05e465ed531501ce8e670c95bf9b884070d4e9ca7d57d"},"schema_version":"1.0","source":{"id":"1604.00469","kind":"arxiv","version":1}},"canonical_sha256":"9f4be3870aa2a636b17750b199889ab72654e8f8566cf16235993c36365508fb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9f4be3870aa2a636b17750b199889ab72654e8f8566cf16235993c36365508fb","first_computed_at":"2026-05-18T01:15:48.929555Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:15:48.929555Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VNeqboVtAhTo/dn/9VMPUnClMAfrg5eKiMtKEGOR2RX6F8mMqoPEwDCxupy+WuOw4JqVIGM//1wBNxwzwEbcAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:15:48.930174Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.00469","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d99725aeac3f7ba0d1714d23283c41ccb89aac9e8ae90cbb19ef308d4a58f01e","sha256:c4a3a0fea82fd7832934256e89cd044739e3e2b97ff87c7fb50d3fddd5c6efda"],"state_sha256":"5a31ad7c3236b088ee5fa42f63a2aea227bafc888322f61c915d2efd9d655c35"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0G+/YjMqz6XF3sOZJYEUXxmgxc4QKd6Dio3cp2K4e9UGYabGpEmq2D4kIrKskXvEpJj7x2bPydjmX5N6peYRCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T10:29:21.427616Z","bundle_sha256":"48c6c89b73640c5ab9e7a949f66c42e70021c5f272b7117ffde61cf1b4e19242"}}