{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:2EWKCQFEQ6IHGJXJD3WPQHSUOH","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":"e95f650713c8d517d1df80c1d678fc02b2a548356a825206e437aaadae2b7ae2","cross_cats_sorted":["astro-ph.SR","physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.space-ph","submitted_at":"2013-06-11T14:08:35Z","title_canon_sha256":"df6076bd6c0b4e4a36f2c1814a905893d08cec5b7298ef7ac90e63627e075bd9"},"schema_version":"1.0","source":{"id":"1306.2531","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.2531","created_at":"2026-05-18T03:18:07Z"},{"alias_kind":"arxiv_version","alias_value":"1306.2531v2","created_at":"2026-05-18T03:18:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.2531","created_at":"2026-05-18T03:18:07Z"},{"alias_kind":"pith_short_12","alias_value":"2EWKCQFEQ6IH","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"2EWKCQFEQ6IHGJXJ","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"2EWKCQFE","created_at":"2026-05-18T12:27:30Z"}],"graph_snapshots":[{"event_id":"sha256:a2fa443581f2c4cc70094d7f912eca3fb07e72c678bce658b763df14160b7bb0","target":"graph","created_at":"2026-05-18T03:18:07Z","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 investigate the conditions under which parallel-propagating Alfv\\'en/ion-cyclotron waves are driven unstable by an isotropic ($T_{\\perp \\alpha} = T_{\\parallel\\alpha}$) population of alpha particles drifting parallel to the magnetic field at an average speed $U_{\\alpha}$ with respect to the protons. We derive an approximate analytic condition for the minimum value of $U_{\\alpha}$ needed to excite this instability and refine this result using numerical solutions to the hot-plasma dispersion relation. When the alpha-particle number density is $\\simeq 5%$ of the proton number density and the tw","authors_text":"Benjamin D. G. Chandran, Bennett A. Maruca, Daniel Verscharen, Sofiane Bourouaine","cross_cats":["astro-ph.SR","physics.plasm-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.space-ph","submitted_at":"2013-06-11T14:08:35Z","title":"A Parallel-Propagating Alfv\\'enic Ion-Beam Instability in the High-Beta Solar Wind"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.2531","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":"sha256:3005a2674c66d67d19a296d38999e48d3e7be878041631cc06232ed46ef4c022","target":"record","created_at":"2026-05-18T03:18:07Z","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":"e95f650713c8d517d1df80c1d678fc02b2a548356a825206e437aaadae2b7ae2","cross_cats_sorted":["astro-ph.SR","physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.space-ph","submitted_at":"2013-06-11T14:08:35Z","title_canon_sha256":"df6076bd6c0b4e4a36f2c1814a905893d08cec5b7298ef7ac90e63627e075bd9"},"schema_version":"1.0","source":{"id":"1306.2531","kind":"arxiv","version":2}},"canonical_sha256":"d12ca140a487907326e91eecf81e5471f6309f5559c0005b0cb2f04a576d2251","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d12ca140a487907326e91eecf81e5471f6309f5559c0005b0cb2f04a576d2251","first_computed_at":"2026-05-18T03:18:07.832842Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:18:07.832842Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9DVPumlxGM+kewgLIu96F4ioYTVkhtpSABVGIODkgop+ONGpGrF1lAX50ii4otLU+Eb0E17gbyEeMJ/aw+wTCg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:18:07.833542Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.2531","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3005a2674c66d67d19a296d38999e48d3e7be878041631cc06232ed46ef4c022","sha256:a2fa443581f2c4cc70094d7f912eca3fb07e72c678bce658b763df14160b7bb0"],"state_sha256":"99e18e29a447368c2c1a339dda091f52057714723bd563ef3390719e061e7204"}