{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:CHVQJUUN3VAHXQP6GIIW4PWBN4","short_pith_number":"pith:CHVQJUUN","schema_version":"1.0","canonical_sha256":"11eb04d28ddd407bc1fe32116e3ec16f2d1f6dab7a0170f466b1cd9ab58b50c7","source":{"kind":"arxiv","id":"1202.5608","version":2},"attestation_state":"computed","paper":{"title":"Global Calculations of Density Waves and Gap Formation in Protoplanetary Disks using a Moving Mesh","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.comp-ph","physics.flu-dyn"],"primary_cat":"astro-ph.EP","authors_text":"Andrew I. MacFadyen, Paul C. Duffell","submitted_at":"2012-02-25T05:08:06Z","abstract_excerpt":"We calculate the global quasi-steady state of a thin disk perturbed by a low-mass protoplanet orbiting at a fixed radius using extremely high-resolution numerical integrations of Euler's equations in two dimensions. The calculations are carried out using a moving computational domain, which greatly reduces advection errors and allows for much longer time-steps than a fixed grid. We calculate the angular momentum flux and the torque density as a function of radius and compare them with analytical predictions. We discuss the quasi-steady state after 100 orbits and the prospects for gap formation"},"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":"1202.5608","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-02-25T05:08:06Z","cross_cats_sorted":["physics.comp-ph","physics.flu-dyn"],"title_canon_sha256":"32ff39afa91dc057ada2fc5aabda6568cd854cb51818b6a2fe6c4ae6687aac6e","abstract_canon_sha256":"8946067af967979ab633b8e5d2e59d696f48bf37674df2741ce420c12f624e61"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:19.747132Z","signature_b64":"lVuwzr+oreYoBENO4cS7IDRTYflBkPY/d2NUpiD+1hsz8AhXzFN5VF8QjYNTpNVhnF+U+YRtU2A+OnRjb2YgCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"11eb04d28ddd407bc1fe32116e3ec16f2d1f6dab7a0170f466b1cd9ab58b50c7","last_reissued_at":"2026-05-18T01:58:19.746654Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:19.746654Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Global Calculations of Density Waves and Gap Formation in Protoplanetary Disks using a Moving Mesh","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.comp-ph","physics.flu-dyn"],"primary_cat":"astro-ph.EP","authors_text":"Andrew I. MacFadyen, Paul C. Duffell","submitted_at":"2012-02-25T05:08:06Z","abstract_excerpt":"We calculate the global quasi-steady state of a thin disk perturbed by a low-mass protoplanet orbiting at a fixed radius using extremely high-resolution numerical integrations of Euler's equations in two dimensions. The calculations are carried out using a moving computational domain, which greatly reduces advection errors and allows for much longer time-steps than a fixed grid. We calculate the angular momentum flux and the torque density as a function of radius and compare them with analytical predictions. We discuss the quasi-steady state after 100 orbits and the prospects for gap formation"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.5608","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":"1202.5608","created_at":"2026-05-18T01:58:19.746721+00:00"},{"alias_kind":"arxiv_version","alias_value":"1202.5608v2","created_at":"2026-05-18T01:58:19.746721+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.5608","created_at":"2026-05-18T01:58:19.746721+00:00"},{"alias_kind":"pith_short_12","alias_value":"CHVQJUUN3VAH","created_at":"2026-05-18T12:27:01.376967+00:00"},{"alias_kind":"pith_short_16","alias_value":"CHVQJUUN3VAHXQP6","created_at":"2026-05-18T12:27:01.376967+00:00"},{"alias_kind":"pith_short_8","alias_value":"CHVQJUUN","created_at":"2026-05-18T12:27:01.376967+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/CHVQJUUN3VAHXQP6GIIW4PWBN4","json":"https://pith.science/pith/CHVQJUUN3VAHXQP6GIIW4PWBN4.json","graph_json":"https://pith.science/api/pith-number/CHVQJUUN3VAHXQP6GIIW4PWBN4/graph.json","events_json":"https://pith.science/api/pith-number/CHVQJUUN3VAHXQP6GIIW4PWBN4/events.json","paper":"https://pith.science/paper/CHVQJUUN"},"agent_actions":{"view_html":"https://pith.science/pith/CHVQJUUN3VAHXQP6GIIW4PWBN4","download_json":"https://pith.science/pith/CHVQJUUN3VAHXQP6GIIW4PWBN4.json","view_paper":"https://pith.science/paper/CHVQJUUN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1202.5608&json=true","fetch_graph":"https://pith.science/api/pith-number/CHVQJUUN3VAHXQP6GIIW4PWBN4/graph.json","fetch_events":"https://pith.science/api/pith-number/CHVQJUUN3VAHXQP6GIIW4PWBN4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/CHVQJUUN3VAHXQP6GIIW4PWBN4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/CHVQJUUN3VAHXQP6GIIW4PWBN4/action/storage_attestation","attest_author":"https://pith.science/pith/CHVQJUUN3VAHXQP6GIIW4PWBN4/action/author_attestation","sign_citation":"https://pith.science/pith/CHVQJUUN3VAHXQP6GIIW4PWBN4/action/citation_signature","submit_replication":"https://pith.science/pith/CHVQJUUN3VAHXQP6GIIW4PWBN4/action/replication_record"}},"created_at":"2026-05-18T01:58:19.746721+00:00","updated_at":"2026-05-18T01:58:19.746721+00:00"}