{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:DMSJHFANWQKMBWN6CX6NC6QZIQ","short_pith_number":"pith:DMSJHFAN","schema_version":"1.0","canonical_sha256":"1b2493940db414c0d9be15fcd17a1944378cba871126b9056012f9d1ad235040","source":{"kind":"arxiv","id":"0911.4891","version":2},"attestation_state":"computed","paper":{"title":"On dynamical friction in a gaseous medium with a boundary","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.GA","authors_text":"Fathi Namouni","submitted_at":"2009-11-25T15:59:03Z","abstract_excerpt":"Dynamical friction arises from the interaction of a perturber and the gravitational wake it excites in the ambient medium. We study the effects of the presence of a boundary on dynamical friction by studying analytically the interaction of perturber with uniform rectilinear motion in a uniform homogeneous medium with a reflecting planar boundary. Wake reflection at a medium's boundary may occur at the edges of truncated disks perturbed by planetary or stellar companions as well as in numerical simulations of planet-disk interaction with no-outflow boundary conditions. In this paper, we show th"},"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":"0911.4891","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-11-25T15:59:03Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"84a50807d24a2e0f4c65c1e735a6f022351e90728ba376668d06d011d6f63cb8","abstract_canon_sha256":"bc38b2556b70dd765e2945d2f67464f2e129218ce5ce1a1825f23f5382d8d10f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:31:41.428662Z","signature_b64":"iM4z8HgIrYRnERfistGZiX32SvSrC7ybG1V55ap8EoRLT4iScH5zP9B3c64UwYLobF88chyd32esE3hrVIGmDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1b2493940db414c0d9be15fcd17a1944378cba871126b9056012f9d1ad235040","last_reissued_at":"2026-05-18T04:31:41.427946Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:31:41.427946Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On dynamical friction in a gaseous medium with a boundary","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.GA","authors_text":"Fathi Namouni","submitted_at":"2009-11-25T15:59:03Z","abstract_excerpt":"Dynamical friction arises from the interaction of a perturber and the gravitational wake it excites in the ambient medium. We study the effects of the presence of a boundary on dynamical friction by studying analytically the interaction of perturber with uniform rectilinear motion in a uniform homogeneous medium with a reflecting planar boundary. Wake reflection at a medium's boundary may occur at the edges of truncated disks perturbed by planetary or stellar companions as well as in numerical simulations of planet-disk interaction with no-outflow boundary conditions. In this paper, we show th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.4891","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":"0911.4891","created_at":"2026-05-18T04:31:41.428049+00:00"},{"alias_kind":"arxiv_version","alias_value":"0911.4891v2","created_at":"2026-05-18T04:31:41.428049+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.4891","created_at":"2026-05-18T04:31:41.428049+00:00"},{"alias_kind":"pith_short_12","alias_value":"DMSJHFANWQKM","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_16","alias_value":"DMSJHFANWQKMBWN6","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_8","alias_value":"DMSJHFAN","created_at":"2026-05-18T12:25:59.703012+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/DMSJHFANWQKMBWN6CX6NC6QZIQ","json":"https://pith.science/pith/DMSJHFANWQKMBWN6CX6NC6QZIQ.json","graph_json":"https://pith.science/api/pith-number/DMSJHFANWQKMBWN6CX6NC6QZIQ/graph.json","events_json":"https://pith.science/api/pith-number/DMSJHFANWQKMBWN6CX6NC6QZIQ/events.json","paper":"https://pith.science/paper/DMSJHFAN"},"agent_actions":{"view_html":"https://pith.science/pith/DMSJHFANWQKMBWN6CX6NC6QZIQ","download_json":"https://pith.science/pith/DMSJHFANWQKMBWN6CX6NC6QZIQ.json","view_paper":"https://pith.science/paper/DMSJHFAN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0911.4891&json=true","fetch_graph":"https://pith.science/api/pith-number/DMSJHFANWQKMBWN6CX6NC6QZIQ/graph.json","fetch_events":"https://pith.science/api/pith-number/DMSJHFANWQKMBWN6CX6NC6QZIQ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DMSJHFANWQKMBWN6CX6NC6QZIQ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DMSJHFANWQKMBWN6CX6NC6QZIQ/action/storage_attestation","attest_author":"https://pith.science/pith/DMSJHFANWQKMBWN6CX6NC6QZIQ/action/author_attestation","sign_citation":"https://pith.science/pith/DMSJHFANWQKMBWN6CX6NC6QZIQ/action/citation_signature","submit_replication":"https://pith.science/pith/DMSJHFANWQKMBWN6CX6NC6QZIQ/action/replication_record"}},"created_at":"2026-05-18T04:31:41.428049+00:00","updated_at":"2026-05-18T04:31:41.428049+00:00"}