{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:ZJPOGHJLE4EWUZT2CZAZHCQS2Z","short_pith_number":"pith:ZJPOGHJL","schema_version":"1.0","canonical_sha256":"ca5ee31d2b27096a667a1641938a12d66ee69489a0647a82f0813f41b1f093e0","source":{"kind":"arxiv","id":"1407.5215","version":1},"attestation_state":"computed","paper":{"title":"Feathering Instability of Spiral Arms. II. Parameter Study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"2) ((1) UCSD, (2) ASIAA), Wing-Kit Lee (1","submitted_at":"2014-07-19T18:33:44Z","abstract_excerpt":"We report the results of a parameter study of the feathering stability in the galactic spiral arms. A two-dimensional razor-thin magnetized self-gravitating gas disk with an imposed two-armed stellar spiral structure is considered. Using the formulation developed previously by Lee and Shu, a linear stability analysis of the spiral shock is performed in a localized Cartesian geometry. Results of the parameter study of the base state with a spiral shock are also presented. The single-mode feathering instability that leads to growing perturbations may explain the feathering phenomenon found in ne"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1407.5215","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-07-19T18:33:44Z","cross_cats_sorted":[],"title_canon_sha256":"8259306942422ca79e4825409fd9ed943e2b4fa5e80e3d0ee1d475ae91bfc795","abstract_canon_sha256":"04ec643c6c990f08185313529f5ea9c504f30adfefb3f5174b980da64085fe8e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:44:25.432007Z","signature_b64":"LRxB+tF5HWHFsnPinfR104XeshioPt2gUhTAhb4mXxp1agcu6nI3t54rHamGphg7+CdC3v9EjnI44i7G1whOCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ca5ee31d2b27096a667a1641938a12d66ee69489a0647a82f0813f41b1f093e0","last_reissued_at":"2026-05-18T02:44:25.431610Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:44:25.431610Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Feathering Instability of Spiral Arms. II. Parameter Study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"2) ((1) UCSD, (2) ASIAA), Wing-Kit Lee (1","submitted_at":"2014-07-19T18:33:44Z","abstract_excerpt":"We report the results of a parameter study of the feathering stability in the galactic spiral arms. A two-dimensional razor-thin magnetized self-gravitating gas disk with an imposed two-armed stellar spiral structure is considered. Using the formulation developed previously by Lee and Shu, a linear stability analysis of the spiral shock is performed in a localized Cartesian geometry. Results of the parameter study of the base state with a spiral shock are also presented. The single-mode feathering instability that leads to growing perturbations may explain the feathering phenomenon found in ne"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.5215","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1407.5215","created_at":"2026-05-18T02:44:25.431680+00:00"},{"alias_kind":"arxiv_version","alias_value":"1407.5215v1","created_at":"2026-05-18T02:44:25.431680+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.5215","created_at":"2026-05-18T02:44:25.431680+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZJPOGHJLE4EW","created_at":"2026-05-18T12:28:59.999130+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZJPOGHJLE4EWUZT2","created_at":"2026-05-18T12:28:59.999130+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZJPOGHJL","created_at":"2026-05-18T12:28:59.999130+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ZJPOGHJLE4EWUZT2CZAZHCQS2Z","json":"https://pith.science/pith/ZJPOGHJLE4EWUZT2CZAZHCQS2Z.json","graph_json":"https://pith.science/api/pith-number/ZJPOGHJLE4EWUZT2CZAZHCQS2Z/graph.json","events_json":"https://pith.science/api/pith-number/ZJPOGHJLE4EWUZT2CZAZHCQS2Z/events.json","paper":"https://pith.science/paper/ZJPOGHJL"},"agent_actions":{"view_html":"https://pith.science/pith/ZJPOGHJLE4EWUZT2CZAZHCQS2Z","download_json":"https://pith.science/pith/ZJPOGHJLE4EWUZT2CZAZHCQS2Z.json","view_paper":"https://pith.science/paper/ZJPOGHJL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1407.5215&json=true","fetch_graph":"https://pith.science/api/pith-number/ZJPOGHJLE4EWUZT2CZAZHCQS2Z/graph.json","fetch_events":"https://pith.science/api/pith-number/ZJPOGHJLE4EWUZT2CZAZHCQS2Z/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZJPOGHJLE4EWUZT2CZAZHCQS2Z/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZJPOGHJLE4EWUZT2CZAZHCQS2Z/action/storage_attestation","attest_author":"https://pith.science/pith/ZJPOGHJLE4EWUZT2CZAZHCQS2Z/action/author_attestation","sign_citation":"https://pith.science/pith/ZJPOGHJLE4EWUZT2CZAZHCQS2Z/action/citation_signature","submit_replication":"https://pith.science/pith/ZJPOGHJLE4EWUZT2CZAZHCQS2Z/action/replication_record"}},"created_at":"2026-05-18T02:44:25.431680+00:00","updated_at":"2026-05-18T02:44:25.431680+00:00"}