{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:JOM5TM6OQTPEJC6GHOO2DD6WEI","short_pith_number":"pith:JOM5TM6O","canonical_record":{"source":{"id":"astro-ph/0703235","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-03-09T23:16:00Z","cross_cats_sorted":[],"title_canon_sha256":"bd64ef84d6cd58c7dfd80f22a57b6ce9e26eef7737abc58ae5501e73f1244038","abstract_canon_sha256":"0213b3c18134f01c72276a7bf8fce9ed508a6462265ef6da5464393031393a7e"},"schema_version":"1.0"},"canonical_sha256":"4b99d9b3ce84de448bc63b9da18fd62204a5c99c439abab8a0fec0161da5b794","source":{"kind":"arxiv","id":"astro-ph/0703235","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0703235","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0703235v1","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0703235","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"pith_short_12","alias_value":"JOM5TM6OQTPE","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"JOM5TM6OQTPEJC6G","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"JOM5TM6O","created_at":"2026-05-18T12:25:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:JOM5TM6OQTPEJC6GHOO2DD6WEI","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0703235","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-03-09T23:16:00Z","cross_cats_sorted":[],"title_canon_sha256":"bd64ef84d6cd58c7dfd80f22a57b6ce9e26eef7737abc58ae5501e73f1244038","abstract_canon_sha256":"0213b3c18134f01c72276a7bf8fce9ed508a6462265ef6da5464393031393a7e"},"schema_version":"1.0"},"canonical_sha256":"4b99d9b3ce84de448bc63b9da18fd62204a5c99c439abab8a0fec0161da5b794","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:05.822484Z","signature_b64":"cZdcxMjqqdAQpC4sMki5B8/IXBUclkLNgbctkUGBlMOkpFi+rZNmFEIJMp6x2KTHw6S5yovl9QZTxT5XyKBIBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4b99d9b3ce84de448bc63b9da18fd62204a5c99c439abab8a0fec0161da5b794","last_reissued_at":"2026-05-18T04:29:05.821893Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:05.821893Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0703235","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":"2026-05-18T04:29:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0DGjOjZ1XMVTrFgq7dZCNbJ4w1CT325MzOlB1czrwwWkPR/v1Q4h/JqNgX5kl4usqxGBZvKVfme/56CFtPgpDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T03:50:31.955015Z"},"content_sha256":"2f7fb71ee27005d44fc0ad29b11eddfe434e0190f0d6af6f83d1dc89b6d6f22b","schema_version":"1.0","event_id":"sha256:2f7fb71ee27005d44fc0ad29b11eddfe434e0190f0d6af6f83d1dc89b6d6f22b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:JOM5TM6OQTPEJC6GHOO2DD6WEI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Parametric instability in dark molecular clouds","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"B. P. Pandey, S. V. Vladimirov","submitted_at":"2007-03-09T23:16:00Z","abstract_excerpt":"The present work investigates the parametric instability of parallel propagating circularly polarized Alfven(pump) waves in a weakly ionized molecular cloud. It is shown that the relative drift between the plasma particles gives rise to the Hall effect resulting in the modified pump wave characteristics. Although the linearized fluid equations with periodic coefficients are difficult to solve analytically, it is shown that a linear transformation can remove the periodic dependence. The resulting linearized equations with constant coefficients are used to derive an algebraic dispersion relation"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0703235","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":"2026-05-18T04:29:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wIOP8zHEyvNdcZQP1mkkT0h+z4Kw+o24BfBQzOYziflTssREEsBvGr/RinHEwmVkAIzpSmhtmcdP0wPh1kc3Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T03:50:31.955773Z"},"content_sha256":"6a40047e4408eb0abf4a8a621145800f72750d07ecb4a3386c7adc6cd81e39de","schema_version":"1.0","event_id":"sha256:6a40047e4408eb0abf4a8a621145800f72750d07ecb4a3386c7adc6cd81e39de"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JOM5TM6OQTPEJC6GHOO2DD6WEI/bundle.json","state_url":"https://pith.science/pith/JOM5TM6OQTPEJC6GHOO2DD6WEI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JOM5TM6OQTPEJC6GHOO2DD6WEI/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":"2026-06-10T03:50:31Z","links":{"resolver":"https://pith.science/pith/JOM5TM6OQTPEJC6GHOO2DD6WEI","bundle":"https://pith.science/pith/JOM5TM6OQTPEJC6GHOO2DD6WEI/bundle.json","state":"https://pith.science/pith/JOM5TM6OQTPEJC6GHOO2DD6WEI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JOM5TM6OQTPEJC6GHOO2DD6WEI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:JOM5TM6OQTPEJC6GHOO2DD6WEI","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":"0213b3c18134f01c72276a7bf8fce9ed508a6462265ef6da5464393031393a7e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-03-09T23:16:00Z","title_canon_sha256":"bd64ef84d6cd58c7dfd80f22a57b6ce9e26eef7737abc58ae5501e73f1244038"},"schema_version":"1.0","source":{"id":"astro-ph/0703235","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0703235","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0703235v1","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0703235","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"pith_short_12","alias_value":"JOM5TM6OQTPE","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"JOM5TM6OQTPEJC6G","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"JOM5TM6O","created_at":"2026-05-18T12:25:55Z"}],"graph_snapshots":[{"event_id":"sha256:6a40047e4408eb0abf4a8a621145800f72750d07ecb4a3386c7adc6cd81e39de","target":"graph","created_at":"2026-05-18T04:29:05Z","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":"The present work investigates the parametric instability of parallel propagating circularly polarized Alfven(pump) waves in a weakly ionized molecular cloud. It is shown that the relative drift between the plasma particles gives rise to the Hall effect resulting in the modified pump wave characteristics. Although the linearized fluid equations with periodic coefficients are difficult to solve analytically, it is shown that a linear transformation can remove the periodic dependence. The resulting linearized equations with constant coefficients are used to derive an algebraic dispersion relation","authors_text":"B. P. Pandey, S. V. Vladimirov","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-03-09T23:16:00Z","title":"Parametric instability in dark molecular clouds"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0703235","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":"sha256:2f7fb71ee27005d44fc0ad29b11eddfe434e0190f0d6af6f83d1dc89b6d6f22b","target":"record","created_at":"2026-05-18T04:29:05Z","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":"0213b3c18134f01c72276a7bf8fce9ed508a6462265ef6da5464393031393a7e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-03-09T23:16:00Z","title_canon_sha256":"bd64ef84d6cd58c7dfd80f22a57b6ce9e26eef7737abc58ae5501e73f1244038"},"schema_version":"1.0","source":{"id":"astro-ph/0703235","kind":"arxiv","version":1}},"canonical_sha256":"4b99d9b3ce84de448bc63b9da18fd62204a5c99c439abab8a0fec0161da5b794","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4b99d9b3ce84de448bc63b9da18fd62204a5c99c439abab8a0fec0161da5b794","first_computed_at":"2026-05-18T04:29:05.821893Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:05.821893Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cZdcxMjqqdAQpC4sMki5B8/IXBUclkLNgbctkUGBlMOkpFi+rZNmFEIJMp6x2KTHw6S5yovl9QZTxT5XyKBIBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:05.822484Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0703235","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2f7fb71ee27005d44fc0ad29b11eddfe434e0190f0d6af6f83d1dc89b6d6f22b","sha256:6a40047e4408eb0abf4a8a621145800f72750d07ecb4a3386c7adc6cd81e39de"],"state_sha256":"bb200b364f42e6f58afed14f1e6cb2b8771e0b802922dd9b786175d8b1ae1090"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nr0IsBroQ43B5AUi4XmN3ptS+Q0hyRLeMVAJcFy9tiUMzo+3pExrQcijB5W8+Fo0kBbk8wdumeG8ErY/wRqvCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T03:50:31.959969Z","bundle_sha256":"ab4d2b23b0f828c50068af0e993526f1bf293ce6363a7cee398501873c8a9581"}}