{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"bf561a8cc99fc62d37329980a2ae44de7d47de189741367315d5d2de5e030db1","created":"2026-10-03T07:17:51Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"a3ec51e46b11d663f86f070732b41de37d931dd47b934929968811fbd113f26e","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"cosmo.cosmic-magnetism","field":"cosmo","n":"1","review_cite":"Durrer R., Neronov A., Cosmological magnetic fields: their generation, evolution and observation, Astronomy and Astrophysics Review, 2013","review_link":"https://arxiv.org/abs/1303.7121","review_verified":"true","summary":"Galaxies and galaxy clusters carry magnetic fields of a few millionths of a gauss, and gamma-ray observations suggest that even the near-empty voids between galaxies are weakly magnetized. Nobody knows whether these fields started from seeds made in the early universe or later by stars and galaxies.","title":"Origin of cosmic magnetic fields","topic_ref":null,"why":"A primordial origin would give direct evidence about early-universe phase transitions or inflation, and the fields shape cosmic-ray propagation and galaxy evolution."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"4a10d151d11d41a3a49cfa9ae855770ef191bf64efebccf6b46e1162c895e62e","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"b01f4c7059811cbc11545a2d1d3b8c130c83e755cdcb503370a59e414aa2fdfa","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"h5KgO-hTXLyDeQxbHhXeV6qPPVUB5MuO5Eaw274ZVJCYf8Pvj3oeWw7T9UPMvJ7GrP4b1xvQxsut18S8r1u1CQ"},"schema":"pubphys.envelope/1"},"record_hash":"4a10d151d11d41a3a49cfa9ae855770ef191bf64efebccf6b46e1162c895e62e","leaf_index":184}