{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:QYNPP3WUWGRPQ7D7X6FJGZQCTR","short_pith_number":"pith:QYNPP3WU","schema_version":"1.0","canonical_sha256":"861af7eed4b1a2f87c7fbf8a9366029c478762ad823ef059f701745832c6c77c","source":{"kind":"arxiv","id":"0908.1791","version":2},"attestation_state":"computed","paper":{"title":"Angular Momentum Transport in Protoplanetary and Black-Hole Accretion Disks: The Role of Parasitic Modes in the Saturation of MHD Turbulence","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Martin E. Pessah (Institute for Advanced Study)","submitted_at":"2009-08-13T18:19:23Z","abstract_excerpt":"The magnetorotational instability (MRI) is considered a key process for driving efficient angular momentum transport in astrophysical disks. Understanding its non-linear saturation constitutes a fundamental problem in modern accretion disk theory. The large dynamical range in physical conditions in accretion disks makes it challenging to address this problem only with numerical simulations. We analyze the concept that (secondary) parasitic instabilities are responsible for the saturation of the MRI. Our approach enables us to explore dissipative regimes that are relevant to astrophysical and l"},"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":"0908.1791","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-08-13T18:19:23Z","cross_cats_sorted":[],"title_canon_sha256":"f8840610301daa485b9878322054b30b05faf064f0ca635c6328cd36f8739007","abstract_canon_sha256":"a84d66e5c1f121b86db4de4b31019fbe1ca2047b9103e3778bbe0073f7e590c0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:55:01.841343Z","signature_b64":"ge3ODmAY8uQLxx2iw5Z4kU/KzO4QE3bpZ01e52CqNwtX7GxG1Fq9HJZLZusvCD5y3OmJjAl2kT/WFcczBvyeBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"861af7eed4b1a2f87c7fbf8a9366029c478762ad823ef059f701745832c6c77c","last_reissued_at":"2026-05-18T03:55:01.840638Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:55:01.840638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Angular Momentum Transport in Protoplanetary and Black-Hole Accretion Disks: The Role of Parasitic Modes in the Saturation of MHD Turbulence","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Martin E. Pessah (Institute for Advanced Study)","submitted_at":"2009-08-13T18:19:23Z","abstract_excerpt":"The magnetorotational instability (MRI) is considered a key process for driving efficient angular momentum transport in astrophysical disks. Understanding its non-linear saturation constitutes a fundamental problem in modern accretion disk theory. The large dynamical range in physical conditions in accretion disks makes it challenging to address this problem only with numerical simulations. We analyze the concept that (secondary) parasitic instabilities are responsible for the saturation of the MRI. Our approach enables us to explore dissipative regimes that are relevant to astrophysical and l"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.1791","kind":"arxiv","version":2},"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":"0908.1791","created_at":"2026-05-18T03:55:01.840746+00:00"},{"alias_kind":"arxiv_version","alias_value":"0908.1791v2","created_at":"2026-05-18T03:55:01.840746+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.1791","created_at":"2026-05-18T03:55:01.840746+00:00"},{"alias_kind":"pith_short_12","alias_value":"QYNPP3WUWGRP","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_16","alias_value":"QYNPP3WUWGRPQ7D7","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_8","alias_value":"QYNPP3WU","created_at":"2026-05-18T12:26:01.383474+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/QYNPP3WUWGRPQ7D7X6FJGZQCTR","json":"https://pith.science/pith/QYNPP3WUWGRPQ7D7X6FJGZQCTR.json","graph_json":"https://pith.science/api/pith-number/QYNPP3WUWGRPQ7D7X6FJGZQCTR/graph.json","events_json":"https://pith.science/api/pith-number/QYNPP3WUWGRPQ7D7X6FJGZQCTR/events.json","paper":"https://pith.science/paper/QYNPP3WU"},"agent_actions":{"view_html":"https://pith.science/pith/QYNPP3WUWGRPQ7D7X6FJGZQCTR","download_json":"https://pith.science/pith/QYNPP3WUWGRPQ7D7X6FJGZQCTR.json","view_paper":"https://pith.science/paper/QYNPP3WU","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0908.1791&json=true","fetch_graph":"https://pith.science/api/pith-number/QYNPP3WUWGRPQ7D7X6FJGZQCTR/graph.json","fetch_events":"https://pith.science/api/pith-number/QYNPP3WUWGRPQ7D7X6FJGZQCTR/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QYNPP3WUWGRPQ7D7X6FJGZQCTR/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QYNPP3WUWGRPQ7D7X6FJGZQCTR/action/storage_attestation","attest_author":"https://pith.science/pith/QYNPP3WUWGRPQ7D7X6FJGZQCTR/action/author_attestation","sign_citation":"https://pith.science/pith/QYNPP3WUWGRPQ7D7X6FJGZQCTR/action/citation_signature","submit_replication":"https://pith.science/pith/QYNPP3WUWGRPQ7D7X6FJGZQCTR/action/replication_record"}},"created_at":"2026-05-18T03:55:01.840746+00:00","updated_at":"2026-05-18T03:55:01.840746+00:00"}