{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1994:WQ7TEQTA7ZZHEHK5GI5TJKXWBK","short_pith_number":"pith:WQ7TEQTA","canonical_record":{"source":{"id":"astro-ph/9412070","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1994-12-20T01:10:09Z","cross_cats_sorted":[],"title_canon_sha256":"c201cb967af839ff7aa47cef34536e9ad6c2fe7829fc7d73398fada144c600d2","abstract_canon_sha256":"5052cf15598d7e9ab74a5ac3b19a4872d4c5a071c05352bbeb2ce930c15e4694"},"schema_version":"1.0"},"canonical_sha256":"b43f324260fe72721d5d323b34aaf60aa93df2b821764604d206b30207ea0713","source":{"kind":"arxiv","id":"astro-ph/9412070","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9412070","created_at":"2026-07-04T15:56:33Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9412070v2","created_at":"2026-07-04T15:56:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9412070","created_at":"2026-07-04T15:56:33Z"},{"alias_kind":"pith_short_12","alias_value":"WQ7TEQTA7ZZH","created_at":"2026-07-04T15:56:33Z"},{"alias_kind":"pith_short_16","alias_value":"WQ7TEQTA7ZZHEHK5","created_at":"2026-07-04T15:56:33Z"},{"alias_kind":"pith_short_8","alias_value":"WQ7TEQTA","created_at":"2026-07-04T15:56:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1994:WQ7TEQTA7ZZHEHK5GI5TJKXWBK","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9412070","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1994-12-20T01:10:09Z","cross_cats_sorted":[],"title_canon_sha256":"c201cb967af839ff7aa47cef34536e9ad6c2fe7829fc7d73398fada144c600d2","abstract_canon_sha256":"5052cf15598d7e9ab74a5ac3b19a4872d4c5a071c05352bbeb2ce930c15e4694"},"schema_version":"1.0"},"canonical_sha256":"b43f324260fe72721d5d323b34aaf60aa93df2b821764604d206b30207ea0713","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:56:33.015270Z","signature_b64":"b+j7YLAd7KEodYQ5PRN+2Wx6o0snBQkcK+H+0iE58MBu7drY2MAte4JP14H4JPrx8BIbQYhUV1ZY2xKOQXpaCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b43f324260fe72721d5d323b34aaf60aa93df2b821764604d206b30207ea0713","last_reissued_at":"2026-07-04T15:56:33.014905Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:56:33.014905Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9412070","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":"2026-07-04T15:56:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3+RktK9S2GBtz5kvVdT1GdZrUhRHccTawZ41acXBWAlzPQv9GyDpxhyFN1+24bU2JkUX6OAoPCt0cbKko8qDBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T07:58:48.697587Z"},"content_sha256":"c64943471963e8d119f2ea85146b95229e7381cac5eb725903796cb19cff28d8","schema_version":"1.0","event_id":"sha256:c64943471963e8d119f2ea85146b95229e7381cac5eb725903796cb19cff28d8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1994:WQ7TEQTA7ZZHEHK5GI5TJKXWBK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Generation of Density Perturbations by Primordial Magnetic Fields","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Angela Olinto, Eun-Jin Kim, Robert Rosner","submitted_at":"1994-12-20T01:10:09Z","abstract_excerpt":"We study the generation and evolution of density perturbations and peculiar velocities due to primordial magnetic fields. We assume that a random magnetic field was present before recombination and follow the field's effect on the baryon fluid starting at recombination. We find that magnetic fields generate growing density perturbations on length scales larger than the magnetic Jeans length, $\\lambda_B$, and damped oscillations for scales smaller than $\\lambda_B$. For small wavenumbers $k$ (large length scales), we find the magnetic field-induced density power spectrum generally scales as $k^4"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9412070","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/astro-ph/9412070/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:56:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RPl6YiOEuxUwUg03QlbHkHjblcSUBk17zgbdP1p8HTG/pbWRbP19Tm67A2e3uPzSVVsRKvPoDO262ffdzpgZAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T07:58:48.698085Z"},"content_sha256":"46bdab45e4e2311d855227de3afe1f3327f8d70d7589e33f24e84a510025e7ab","schema_version":"1.0","event_id":"sha256:46bdab45e4e2311d855227de3afe1f3327f8d70d7589e33f24e84a510025e7ab"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WQ7TEQTA7ZZHEHK5GI5TJKXWBK/bundle.json","state_url":"https://pith.science/pith/WQ7TEQTA7ZZHEHK5GI5TJKXWBK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WQ7TEQTA7ZZHEHK5GI5TJKXWBK/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":"2026-08-21T07:58:48Z","links":{"resolver":"https://pith.science/pith/WQ7TEQTA7ZZHEHK5GI5TJKXWBK","bundle":"https://pith.science/pith/WQ7TEQTA7ZZHEHK5GI5TJKXWBK/bundle.json","state":"https://pith.science/pith/WQ7TEQTA7ZZHEHK5GI5TJKXWBK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WQ7TEQTA7ZZHEHK5GI5TJKXWBK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1994:WQ7TEQTA7ZZHEHK5GI5TJKXWBK","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":"5052cf15598d7e9ab74a5ac3b19a4872d4c5a071c05352bbeb2ce930c15e4694","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1994-12-20T01:10:09Z","title_canon_sha256":"c201cb967af839ff7aa47cef34536e9ad6c2fe7829fc7d73398fada144c600d2"},"schema_version":"1.0","source":{"id":"astro-ph/9412070","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9412070","created_at":"2026-07-04T15:56:33Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9412070v2","created_at":"2026-07-04T15:56:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9412070","created_at":"2026-07-04T15:56:33Z"},{"alias_kind":"pith_short_12","alias_value":"WQ7TEQTA7ZZH","created_at":"2026-07-04T15:56:33Z"},{"alias_kind":"pith_short_16","alias_value":"WQ7TEQTA7ZZHEHK5","created_at":"2026-07-04T15:56:33Z"},{"alias_kind":"pith_short_8","alias_value":"WQ7TEQTA","created_at":"2026-07-04T15:56:33Z"}],"graph_snapshots":[{"event_id":"sha256:46bdab45e4e2311d855227de3afe1f3327f8d70d7589e33f24e84a510025e7ab","target":"graph","created_at":"2026-07-04T15:56:33Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/9412070/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study the generation and evolution of density perturbations and peculiar velocities due to primordial magnetic fields. We assume that a random magnetic field was present before recombination and follow the field's effect on the baryon fluid starting at recombination. We find that magnetic fields generate growing density perturbations on length scales larger than the magnetic Jeans length, $\\lambda_B$, and damped oscillations for scales smaller than $\\lambda_B$. For small wavenumbers $k$ (large length scales), we find the magnetic field-induced density power spectrum generally scales as $k^4","authors_text":"Angela Olinto, Eun-Jin Kim, Robert Rosner","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1994-12-20T01:10:09Z","title":"Generation of Density Perturbations by Primordial Magnetic Fields"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9412070","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:c64943471963e8d119f2ea85146b95229e7381cac5eb725903796cb19cff28d8","target":"record","created_at":"2026-07-04T15:56:33Z","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":"5052cf15598d7e9ab74a5ac3b19a4872d4c5a071c05352bbeb2ce930c15e4694","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1994-12-20T01:10:09Z","title_canon_sha256":"c201cb967af839ff7aa47cef34536e9ad6c2fe7829fc7d73398fada144c600d2"},"schema_version":"1.0","source":{"id":"astro-ph/9412070","kind":"arxiv","version":2}},"canonical_sha256":"b43f324260fe72721d5d323b34aaf60aa93df2b821764604d206b30207ea0713","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b43f324260fe72721d5d323b34aaf60aa93df2b821764604d206b30207ea0713","first_computed_at":"2026-07-04T15:56:33.014905Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:56:33.014905Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"b+j7YLAd7KEodYQ5PRN+2Wx6o0snBQkcK+H+0iE58MBu7drY2MAte4JP14H4JPrx8BIbQYhUV1ZY2xKOQXpaCQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:56:33.015270Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9412070","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c64943471963e8d119f2ea85146b95229e7381cac5eb725903796cb19cff28d8","sha256:46bdab45e4e2311d855227de3afe1f3327f8d70d7589e33f24e84a510025e7ab"],"state_sha256":"b85ebbae35f9af3e9be72f7c5a6fa6844c8c8d0b0237ad37e00727c8b8c8967c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b5lsT8P8LtayQjHetRtyboKCSoIceqxQioJIcLje5Rf9w+KL4r/SOKpTo347PMuPGdFO9tqi7lFYB9lJh0LnBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T07:58:48.703108Z","bundle_sha256":"e3ae21970e2cab4f96094a88c9c70e01d4d56afb3f65bc6555fa9f6081d2ee74"}}