{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:PCPG7DQEJXUYBHPREUVWB4LPHL","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":"91142e9935ccb2b46e1c412f6a90d70b2f0eb444653fe9802d72554ce6e17c86","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.space-ph","submitted_at":"2019-05-22T05:22:27Z","title_canon_sha256":"d2ca33f3ed2d4a74aec64b25a2ac77a57814779f8f1a82f642bb963e2228fde1"},"schema_version":"1.0","source":{"id":"1905.08954","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.08954","created_at":"2026-05-17T23:45:24Z"},{"alias_kind":"arxiv_version","alias_value":"1905.08954v1","created_at":"2026-05-17T23:45:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.08954","created_at":"2026-05-17T23:45:24Z"},{"alias_kind":"pith_short_12","alias_value":"PCPG7DQEJXUY","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"PCPG7DQEJXUYBHPR","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"PCPG7DQE","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:09b8633c4cef7b8571cde9e5268cb0b5e824b90190a3eee6335430d6a696794b","target":"graph","created_at":"2026-05-17T23:45:24Z","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":"We present an analysis of simultaneous particle and field measurements from the ARTEMIS spacecraft which demonstrate that quasi-parallel whistler waves in the solar wind can be generated locally by a bulk flow of halo electrons (whistler heat flux instability). ARTEMIS observes quasi-parallel whistler waves in the frequency range $\\sim 0.05 - 0.2 f_{ce}$ simultaneously with electron velocity distribution functions that are a combination of counter-streaming core and halo populations. A linear stability analysis shows that the plasma is stable when there are no whistler waves, and unstable in t","authors_text":"Anton V. Artemyev, Forrest S. Mozer, Ivan Y. Vasko, Marc Pulupa, Stuart D. Bale, Vladimir Krasnoselskikh, Yuguang Tong","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.space-ph","submitted_at":"2019-05-22T05:22:27Z","title":"Whistler wave generation by halo electrons in the solar wind"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.08954","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":"sha256:4e6d19a5f9d1ea9434ff76b51184b3dce36163fc91534ec8808cdc456b691640","target":"record","created_at":"2026-05-17T23:45:24Z","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":"91142e9935ccb2b46e1c412f6a90d70b2f0eb444653fe9802d72554ce6e17c86","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.space-ph","submitted_at":"2019-05-22T05:22:27Z","title_canon_sha256":"d2ca33f3ed2d4a74aec64b25a2ac77a57814779f8f1a82f642bb963e2228fde1"},"schema_version":"1.0","source":{"id":"1905.08954","kind":"arxiv","version":1}},"canonical_sha256":"789e6f8e044de9809df1252b60f16f3ac89becca211324fa81b0d67f62ae5857","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"789e6f8e044de9809df1252b60f16f3ac89becca211324fa81b0d67f62ae5857","first_computed_at":"2026-05-17T23:45:24.772929Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:45:24.772929Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nTg9RHN29/tR9JIeXqOFuNybGSqhsUtFs0fguvfXfm5bMuuZbHZHtNXdB4pKqzvdtMTO15pXHLhT+0/BSDmJBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:45:24.773335Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.08954","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4e6d19a5f9d1ea9434ff76b51184b3dce36163fc91534ec8808cdc456b691640","sha256:09b8633c4cef7b8571cde9e5268cb0b5e824b90190a3eee6335430d6a696794b"],"state_sha256":"a8f734551d988dc894be4665e03ddf6e97dc0faf82bfdba2c9b4f5941f03d62f"}