{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2001:MGPROZ76YEY676IAYRDCTJNZFW","short_pith_number":"pith:MGPROZ76","schema_version":"1.0","canonical_sha256":"619f1767fec131eff900c44629a5b92d9b9fc292bb4eea5693f61b76f79468c8","source":{"kind":"arxiv","id":"astro-ph/0103409","version":1},"attestation_state":"computed","paper":{"title":"Stability of accretion discs threaded by a strong magnetic field","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"H.C. Spruit, R. Stehle","submitted_at":"2001-03-25T16:09:42Z","abstract_excerpt":"We study the stability of poloidal magnetic fields anchored in a thin accretion disc. The two-dimensional hydrodynamics in the disc plane is followed by a grid-based numerical simulation including the vertically integrated magnetic forces. The 3--dimensional magnetic field outside the disc is calculated in a potential field approximation from the magnetic flux density distribution in the disc. For uniformly rotating discs we confirm numerically the existence of the interchange instability as predicted by Spruit, Stehle & Papaloizou (1995). In agreement with predictions from the shearing sheet "},"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":"astro-ph/0103409","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-03-25T16:09:42Z","cross_cats_sorted":[],"title_canon_sha256":"e6ed1b41dcc3484b43b397f9b48b48b3092b844bbe4502e95e275568f8a6dcce","abstract_canon_sha256":"0ea9c431fcbe0538350c143de7e3f3ed4256600ece2e39d92d49cb9c10733012"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:44.756951Z","signature_b64":"PyMQU+dBMl3dOM0oF8F2fumQo0VGTkqnsuQnbrb4WwTdaGNkxqQ4gpN3rCQZGoB29mUr0tgPQiHp3b+xSWlSCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"619f1767fec131eff900c44629a5b92d9b9fc292bb4eea5693f61b76f79468c8","last_reissued_at":"2026-05-18T01:40:44.756253Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:44.756253Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Stability of accretion discs threaded by a strong magnetic field","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"H.C. Spruit, R. Stehle","submitted_at":"2001-03-25T16:09:42Z","abstract_excerpt":"We study the stability of poloidal magnetic fields anchored in a thin accretion disc. The two-dimensional hydrodynamics in the disc plane is followed by a grid-based numerical simulation including the vertically integrated magnetic forces. The 3--dimensional magnetic field outside the disc is calculated in a potential field approximation from the magnetic flux density distribution in the disc. For uniformly rotating discs we confirm numerically the existence of the interchange instability as predicted by Spruit, Stehle & Papaloizou (1995). In agreement with predictions from the shearing sheet "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0103409","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":"astro-ph/0103409","created_at":"2026-05-18T01:40:44.756381+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0103409v1","created_at":"2026-05-18T01:40:44.756381+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0103409","created_at":"2026-05-18T01:40:44.756381+00:00"},{"alias_kind":"pith_short_12","alias_value":"MGPROZ76YEY6","created_at":"2026-05-18T12:25:50.845339+00:00"},{"alias_kind":"pith_short_16","alias_value":"MGPROZ76YEY676IA","created_at":"2026-05-18T12:25:50.845339+00:00"},{"alias_kind":"pith_short_8","alias_value":"MGPROZ76","created_at":"2026-05-18T12:25:50.845339+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/MGPROZ76YEY676IAYRDCTJNZFW","json":"https://pith.science/pith/MGPROZ76YEY676IAYRDCTJNZFW.json","graph_json":"https://pith.science/api/pith-number/MGPROZ76YEY676IAYRDCTJNZFW/graph.json","events_json":"https://pith.science/api/pith-number/MGPROZ76YEY676IAYRDCTJNZFW/events.json","paper":"https://pith.science/paper/MGPROZ76"},"agent_actions":{"view_html":"https://pith.science/pith/MGPROZ76YEY676IAYRDCTJNZFW","download_json":"https://pith.science/pith/MGPROZ76YEY676IAYRDCTJNZFW.json","view_paper":"https://pith.science/paper/MGPROZ76","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0103409&json=true","fetch_graph":"https://pith.science/api/pith-number/MGPROZ76YEY676IAYRDCTJNZFW/graph.json","fetch_events":"https://pith.science/api/pith-number/MGPROZ76YEY676IAYRDCTJNZFW/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/MGPROZ76YEY676IAYRDCTJNZFW/action/timestamp_anchor","attest_storage":"https://pith.science/pith/MGPROZ76YEY676IAYRDCTJNZFW/action/storage_attestation","attest_author":"https://pith.science/pith/MGPROZ76YEY676IAYRDCTJNZFW/action/author_attestation","sign_citation":"https://pith.science/pith/MGPROZ76YEY676IAYRDCTJNZFW/action/citation_signature","submit_replication":"https://pith.science/pith/MGPROZ76YEY676IAYRDCTJNZFW/action/replication_record"}},"created_at":"2026-05-18T01:40:44.756381+00:00","updated_at":"2026-05-18T01:40:44.756381+00:00"}