{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1995:HLHRCX4D5DT73KJTZY5KNGYO47","short_pith_number":"pith:HLHRCX4D","canonical_record":{"source":{"id":"astro-ph/9504043","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1995-04-12T21:31:47Z","cross_cats_sorted":[],"title_canon_sha256":"729faa26c8aaf11e88d259f518f6a49cfc8371dd88e2d2e80361f98dca7f1962","abstract_canon_sha256":"d1e2c222ba5c68f9f4362c44bd29ecf2ace7600f835aca174486b756c1a6bdec"},"schema_version":"1.0"},"canonical_sha256":"3acf115f83e8e7fda933ce3aa69b0ee7e68ca1135c1bfe35a69a935d58aaea35","source":{"kind":"arxiv","id":"astro-ph/9504043","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9504043","created_at":"2026-05-18T01:40:23Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9504043v1","created_at":"2026-05-18T01:40:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9504043","created_at":"2026-05-18T01:40:23Z"},{"alias_kind":"pith_short_12","alias_value":"HLHRCX4D5DT7","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"HLHRCX4D5DT73KJT","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"HLHRCX4D","created_at":"2026-05-18T12:25:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1995:HLHRCX4D5DT73KJTZY5KNGYO47","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9504043","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1995-04-12T21:31:47Z","cross_cats_sorted":[],"title_canon_sha256":"729faa26c8aaf11e88d259f518f6a49cfc8371dd88e2d2e80361f98dca7f1962","abstract_canon_sha256":"d1e2c222ba5c68f9f4362c44bd29ecf2ace7600f835aca174486b756c1a6bdec"},"schema_version":"1.0"},"canonical_sha256":"3acf115f83e8e7fda933ce3aa69b0ee7e68ca1135c1bfe35a69a935d58aaea35","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:23.555820Z","signature_b64":"WwqFggH1ZZvrLC1qkMHrewT7+eZDe+kl1BnAz6NKi47662ni5Z99KH4RD8EBLUUbZVYSdyeeXE4ob4vZgFlDCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3acf115f83e8e7fda933ce3aa69b0ee7e68ca1135c1bfe35a69a935d58aaea35","last_reissued_at":"2026-05-18T01:40:23.555049Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:23.555049Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9504043","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":"2026-05-18T01:40:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zKwH2O4XB4O7utl4+li05EsZf1zCs9tn8rTOHv3p0m1IzVnBezPo8Yj8aNb4DOf8gS1AlmK1706kiIaSd0Q1DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T22:43:31.702589Z"},"content_sha256":"7b00db30dce6239aa24c5303ac862a01c3f34f9a0c309b8a62a1e77fc1dc7018","schema_version":"1.0","event_id":"sha256:7b00db30dce6239aa24c5303ac862a01c3f34f9a0c309b8a62a1e77fc1dc7018"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1995:HLHRCX4D5DT73KJTZY5KNGYO47","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Interchange instability in an accretion disc with a poloidal magnetic field","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"H.C. Spruit, J.C.B. Papaloizou, R. Stehle","submitted_at":"1995-04-12T21:31:47Z","abstract_excerpt":"We investigate the stability to nonaxisymmetric perturbations of an accretion disc in which a poloidal magnetic field provides part of the radial support against gravity. Interchange instability due to radial gradients in the magnetic field are strongly stabilized by the shear flow in the disc. For smooth field distributions this instability is restricted to discs in which the magnetic energy is comparable to the gravitational energy. An incompressible model for the instability akin to the Boussinesq approximation for convection is given which predicts the behaviour of the instability accurate"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9504043","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":"2026-05-18T01:40:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wiDMZ81VkPqO3okiTVlQYQJmer7GnVPov8Zq8TpHeYquQlsBo+fzpk3eEiijEcsqNF44g8w2vt9gk5VoF64GCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T22:43:31.702936Z"},"content_sha256":"a5f3985903e5914512cffc920ec2b91c8728490a293340eb9d83c7b361f7c632","schema_version":"1.0","event_id":"sha256:a5f3985903e5914512cffc920ec2b91c8728490a293340eb9d83c7b361f7c632"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HLHRCX4D5DT73KJTZY5KNGYO47/bundle.json","state_url":"https://pith.science/pith/HLHRCX4D5DT73KJTZY5KNGYO47/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HLHRCX4D5DT73KJTZY5KNGYO47/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":"2026-06-08T22:43:31Z","links":{"resolver":"https://pith.science/pith/HLHRCX4D5DT73KJTZY5KNGYO47","bundle":"https://pith.science/pith/HLHRCX4D5DT73KJTZY5KNGYO47/bundle.json","state":"https://pith.science/pith/HLHRCX4D5DT73KJTZY5KNGYO47/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HLHRCX4D5DT73KJTZY5KNGYO47/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1995:HLHRCX4D5DT73KJTZY5KNGYO47","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":"d1e2c222ba5c68f9f4362c44bd29ecf2ace7600f835aca174486b756c1a6bdec","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1995-04-12T21:31:47Z","title_canon_sha256":"729faa26c8aaf11e88d259f518f6a49cfc8371dd88e2d2e80361f98dca7f1962"},"schema_version":"1.0","source":{"id":"astro-ph/9504043","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9504043","created_at":"2026-05-18T01:40:23Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9504043v1","created_at":"2026-05-18T01:40:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9504043","created_at":"2026-05-18T01:40:23Z"},{"alias_kind":"pith_short_12","alias_value":"HLHRCX4D5DT7","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"HLHRCX4D5DT73KJT","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"HLHRCX4D","created_at":"2026-05-18T12:25:47Z"}],"graph_snapshots":[{"event_id":"sha256:a5f3985903e5914512cffc920ec2b91c8728490a293340eb9d83c7b361f7c632","target":"graph","created_at":"2026-05-18T01:40:23Z","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 stability to nonaxisymmetric perturbations of an accretion disc in which a poloidal magnetic field provides part of the radial support against gravity. Interchange instability due to radial gradients in the magnetic field are strongly stabilized by the shear flow in the disc. For smooth field distributions this instability is restricted to discs in which the magnetic energy is comparable to the gravitational energy. An incompressible model for the instability akin to the Boussinesq approximation for convection is given which predicts the behaviour of the instability accurate","authors_text":"H.C. Spruit, J.C.B. Papaloizou, R. Stehle","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1995-04-12T21:31:47Z","title":"Interchange instability in an accretion disc with a poloidal magnetic field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9504043","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":"sha256:7b00db30dce6239aa24c5303ac862a01c3f34f9a0c309b8a62a1e77fc1dc7018","target":"record","created_at":"2026-05-18T01:40:23Z","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":"d1e2c222ba5c68f9f4362c44bd29ecf2ace7600f835aca174486b756c1a6bdec","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1995-04-12T21:31:47Z","title_canon_sha256":"729faa26c8aaf11e88d259f518f6a49cfc8371dd88e2d2e80361f98dca7f1962"},"schema_version":"1.0","source":{"id":"astro-ph/9504043","kind":"arxiv","version":1}},"canonical_sha256":"3acf115f83e8e7fda933ce3aa69b0ee7e68ca1135c1bfe35a69a935d58aaea35","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3acf115f83e8e7fda933ce3aa69b0ee7e68ca1135c1bfe35a69a935d58aaea35","first_computed_at":"2026-05-18T01:40:23.555049Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:23.555049Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WwqFggH1ZZvrLC1qkMHrewT7+eZDe+kl1BnAz6NKi47662ni5Z99KH4RD8EBLUUbZVYSdyeeXE4ob4vZgFlDCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:23.555820Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9504043","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7b00db30dce6239aa24c5303ac862a01c3f34f9a0c309b8a62a1e77fc1dc7018","sha256:a5f3985903e5914512cffc920ec2b91c8728490a293340eb9d83c7b361f7c632"],"state_sha256":"ac961c245be29b7dee07b0f189983d34d7f874f423a6b15732a116dfb7e98173"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BatZ0jv80gCDlBmNhDqrjzHDuUGGgpUCuS4qWX6izpIdJByghCC4ZXOEttjjyvGwg6PaIxpruTKSqxwOkmXNDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T22:43:31.705088Z","bundle_sha256":"0e479df38606cc1b4dcb4efdfca64363ed2835fe13fb9a28f7ff18c86b641547"}}