{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:ME6NG7IJSIR3UNBHETSQYAMDNT","short_pith_number":"pith:ME6NG7IJ","schema_version":"1.0","canonical_sha256":"613cd37d099223ba342724e50c01836cdda7e28e2e41e77da804d0f3e0bab83d","source":{"kind":"arxiv","id":"1903.03744","version":2},"attestation_state":"computed","paper":{"title":"From primordial seed magnetic fields to the galactic dynamo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Kandaswamy Subramanian","submitted_at":"2019-03-09T06:12:19Z","abstract_excerpt":"The origin and maintenance of coherent magnetic fields in the Universe is reviewed with an emphasis on the possible challenges that arise in their theoretical understanding. We begin with the interesting possibility that magnetic fields originated at some level from the early universe. This could be during inflation, the electroweak or the quark-hadron phase transitions. These mechanisms can give rise to fields which could be strong, but often with much smaller coherence scales than galactic scales. Their subsequent turbulent decay decreases their strength but increases their coherence. We the"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1903.03744","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-03-09T06:12:19Z","cross_cats_sorted":["astro-ph.GA","gr-qc"],"title_canon_sha256":"ab022ec548efb927ee11fdd6ee49058b86f04c069e2cbf4e34c75cdfcc3395c8","abstract_canon_sha256":"214a0a6f5d0fb47fdf6635098a74310de3cd4c835737664ab3e8a2286f269dd8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:52:35.182919Z","signature_b64":"nEwM6cslvE2y4Ur79AKoJufc52U4trJVYfe9IUxGgyU2HsmbUEIezxXg50W+mWZjqOjeCsaA1SyVFYn9vvenBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"613cd37d099223ba342724e50c01836cdda7e28e2e41e77da804d0f3e0bab83d","last_reissued_at":"2026-07-04T23:52:35.182488Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:52:35.182488Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"From primordial seed magnetic fields to the galactic dynamo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Kandaswamy Subramanian","submitted_at":"2019-03-09T06:12:19Z","abstract_excerpt":"The origin and maintenance of coherent magnetic fields in the Universe is reviewed with an emphasis on the possible challenges that arise in their theoretical understanding. We begin with the interesting possibility that magnetic fields originated at some level from the early universe. This could be during inflation, the electroweak or the quark-hadron phase transitions. These mechanisms can give rise to fields which could be strong, but often with much smaller coherence scales than galactic scales. Their subsequent turbulent decay decreases their strength but increases their coherence. We the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.03744","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1903.03744/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1903.03744","created_at":"2026-07-04T23:52:35.182543+00:00"},{"alias_kind":"arxiv_version","alias_value":"1903.03744v2","created_at":"2026-07-04T23:52:35.182543+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.03744","created_at":"2026-07-04T23:52:35.182543+00:00"},{"alias_kind":"pith_short_12","alias_value":"ME6NG7IJSIR3","created_at":"2026-07-04T23:52:35.182543+00:00"},{"alias_kind":"pith_short_16","alias_value":"ME6NG7IJSIR3UNBH","created_at":"2026-07-04T23:52:35.182543+00:00"},{"alias_kind":"pith_short_8","alias_value":"ME6NG7IJ","created_at":"2026-07-04T23:52:35.182543+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2605.21281","citing_title":"Self-Consistent Parker Bound on Magnetic Monopoles","ref_index":103,"is_internal_anchor":false},{"citing_arxiv_id":"2605.13016","citing_title":"Revisiting constraints on primordial vector modes and implications for sourced magnetic fields and observed $EB$ power spectrum","ref_index":30,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ME6NG7IJSIR3UNBHETSQYAMDNT","json":"https://pith.science/pith/ME6NG7IJSIR3UNBHETSQYAMDNT.json","graph_json":"https://pith.science/api/pith-number/ME6NG7IJSIR3UNBHETSQYAMDNT/graph.json","events_json":"https://pith.science/api/pith-number/ME6NG7IJSIR3UNBHETSQYAMDNT/events.json","paper":"https://pith.science/paper/ME6NG7IJ"},"agent_actions":{"view_html":"https://pith.science/pith/ME6NG7IJSIR3UNBHETSQYAMDNT","download_json":"https://pith.science/pith/ME6NG7IJSIR3UNBHETSQYAMDNT.json","view_paper":"https://pith.science/paper/ME6NG7IJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1903.03744&json=true","fetch_graph":"https://pith.science/api/pith-number/ME6NG7IJSIR3UNBHETSQYAMDNT/graph.json","fetch_events":"https://pith.science/api/pith-number/ME6NG7IJSIR3UNBHETSQYAMDNT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ME6NG7IJSIR3UNBHETSQYAMDNT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ME6NG7IJSIR3UNBHETSQYAMDNT/action/storage_attestation","attest_author":"https://pith.science/pith/ME6NG7IJSIR3UNBHETSQYAMDNT/action/author_attestation","sign_citation":"https://pith.science/pith/ME6NG7IJSIR3UNBHETSQYAMDNT/action/citation_signature","submit_replication":"https://pith.science/pith/ME6NG7IJSIR3UNBHETSQYAMDNT/action/replication_record"}},"created_at":"2026-07-04T23:52:35.182543+00:00","updated_at":"2026-07-04T23:52:35.182543+00:00"}