{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:4ECLH2Y7MADH7QRS2YRIHCYMLT","short_pith_number":"pith:4ECLH2Y7","schema_version":"1.0","canonical_sha256":"e104b3eb1f60067fc232d622838b0c5cd9c552f130c4e71f2e626aa2b87209af","source":{"kind":"arxiv","id":"1109.0691","version":2},"attestation_state":"computed","paper":{"title":"Primordial magnetic fields generated by the non-adiabatic fluctuations at pre-recombination era","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Keitaro Takahashi, Kiyotomo Ichiki, Satoshi Maeda","submitted_at":"2011-09-04T10:26:11Z","abstract_excerpt":"In the pre-recombination era, cosmological density fluctuations can naturally generate magnetic fields through Thomson scatterings. In previous studies, only the magnetic field generation from the initially-adiabatic fluctuations has been considered. Here we investigate the generation of cosmological magnetic fields sourced by the primordial non-adiabatic fluctuations based on the cosmological perturbation theory, using the tight-coupling approximations between photon and baryon fluids. It is found that the magnetic fields from the non-adiabatic fluctuations can arise at the first-order expans"},"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":"1109.0691","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-09-04T10:26:11Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"662dc6bf273e14dc920b60d158cc03c7c00d6b51b38731235dc71a5ea6ef080a","abstract_canon_sha256":"ca9ffe614d29bb682d07c82f80d47d6c60d48dcfcc544dd63316f5cf0c873c4c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:40.277495Z","signature_b64":"9g+kYp3WQXfT2fu+Rshbdnk5QogGagpW3aDSCEHFQOAZCf66taHcXBmpuyngG7kUjdOt7+5si8peydLhyEeYCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e104b3eb1f60067fc232d622838b0c5cd9c552f130c4e71f2e626aa2b87209af","last_reissued_at":"2026-05-18T02:00:40.276802Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:40.276802Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Primordial magnetic fields generated by the non-adiabatic fluctuations at pre-recombination era","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Keitaro Takahashi, Kiyotomo Ichiki, Satoshi Maeda","submitted_at":"2011-09-04T10:26:11Z","abstract_excerpt":"In the pre-recombination era, cosmological density fluctuations can naturally generate magnetic fields through Thomson scatterings. In previous studies, only the magnetic field generation from the initially-adiabatic fluctuations has been considered. Here we investigate the generation of cosmological magnetic fields sourced by the primordial non-adiabatic fluctuations based on the cosmological perturbation theory, using the tight-coupling approximations between photon and baryon fluids. It is found that the magnetic fields from the non-adiabatic fluctuations can arise at the first-order expans"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.0691","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1109.0691","created_at":"2026-05-18T02:00:40.276897+00:00"},{"alias_kind":"arxiv_version","alias_value":"1109.0691v2","created_at":"2026-05-18T02:00:40.276897+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.0691","created_at":"2026-05-18T02:00:40.276897+00:00"},{"alias_kind":"pith_short_12","alias_value":"4ECLH2Y7MADH","created_at":"2026-05-18T12:26:20.644004+00:00"},{"alias_kind":"pith_short_16","alias_value":"4ECLH2Y7MADH7QRS","created_at":"2026-05-18T12:26:20.644004+00:00"},{"alias_kind":"pith_short_8","alias_value":"4ECLH2Y7","created_at":"2026-05-18T12:26:20.644004+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4ECLH2Y7MADH7QRS2YRIHCYMLT","json":"https://pith.science/pith/4ECLH2Y7MADH7QRS2YRIHCYMLT.json","graph_json":"https://pith.science/api/pith-number/4ECLH2Y7MADH7QRS2YRIHCYMLT/graph.json","events_json":"https://pith.science/api/pith-number/4ECLH2Y7MADH7QRS2YRIHCYMLT/events.json","paper":"https://pith.science/paper/4ECLH2Y7"},"agent_actions":{"view_html":"https://pith.science/pith/4ECLH2Y7MADH7QRS2YRIHCYMLT","download_json":"https://pith.science/pith/4ECLH2Y7MADH7QRS2YRIHCYMLT.json","view_paper":"https://pith.science/paper/4ECLH2Y7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1109.0691&json=true","fetch_graph":"https://pith.science/api/pith-number/4ECLH2Y7MADH7QRS2YRIHCYMLT/graph.json","fetch_events":"https://pith.science/api/pith-number/4ECLH2Y7MADH7QRS2YRIHCYMLT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4ECLH2Y7MADH7QRS2YRIHCYMLT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4ECLH2Y7MADH7QRS2YRIHCYMLT/action/storage_attestation","attest_author":"https://pith.science/pith/4ECLH2Y7MADH7QRS2YRIHCYMLT/action/author_attestation","sign_citation":"https://pith.science/pith/4ECLH2Y7MADH7QRS2YRIHCYMLT/action/citation_signature","submit_replication":"https://pith.science/pith/4ECLH2Y7MADH7QRS2YRIHCYMLT/action/replication_record"}},"created_at":"2026-05-18T02:00:40.276897+00:00","updated_at":"2026-05-18T02:00:40.276897+00:00"}