{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:QRER7CU7PBXX4AIB62M7KQ7G2I","short_pith_number":"pith:QRER7CU7","schema_version":"1.0","canonical_sha256":"84491f8a9f786f7e0101f699f543e6d21f3ff09fef4a064534133a93bb4369ef","source":{"kind":"arxiv","id":"0901.3076","version":1},"attestation_state":"computed","paper":{"title":"Internal resonance in non-linear disk oscillations and the amplitude evolution of neutron star kilohertz QPOs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"G. Torok, J. Horak, M. A. Abramowicz, P. Rebusco, W. Kluzniak","submitted_at":"2009-01-20T15:10:04Z","abstract_excerpt":"We explore some properties of twin kilohertz quasiperiodic oscillations (QPOs) in a simple toy-model consisting of two oscillation modes coupled by a general nonlinear force. We examine resonant effects by slowly varying the values of the tunable, and nearly commensurable, eigenfrequencies. The behavior of the actual oscillation frequencies and amplitudes during a slow transition through the 3:2 resonance is examined in detail and it is shown that both are significantly affected by the nonlinearities in the governing equations. In particular, the amplitudes of oscillations reflect a resonant e"},"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":"0901.3076","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-01-20T15:10:04Z","cross_cats_sorted":[],"title_canon_sha256":"9bef6f8ce922fdb1e521b9b62f839cf69de79c7f3842020ebf7ac5f46f127a26","abstract_canon_sha256":"705a16c5812db71fa9336c573c996c9639cb48d530fdb6a87e9609e0e2eb50e0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:14:56.636745Z","signature_b64":"XjlgOpbS8jajEHXsVhBLESwGl8zRSym3mbuFdpSgUDiTSqpvmj8OhSwTF5sXplxGIg+x8Bd0jPzbnni3Pk2/Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84491f8a9f786f7e0101f699f543e6d21f3ff09fef4a064534133a93bb4369ef","last_reissued_at":"2026-05-18T02:14:56.636199Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:14:56.636199Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Internal resonance in non-linear disk oscillations and the amplitude evolution of neutron star kilohertz QPOs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"G. Torok, J. Horak, M. A. Abramowicz, P. Rebusco, W. Kluzniak","submitted_at":"2009-01-20T15:10:04Z","abstract_excerpt":"We explore some properties of twin kilohertz quasiperiodic oscillations (QPOs) in a simple toy-model consisting of two oscillation modes coupled by a general nonlinear force. We examine resonant effects by slowly varying the values of the tunable, and nearly commensurable, eigenfrequencies. The behavior of the actual oscillation frequencies and amplitudes during a slow transition through the 3:2 resonance is examined in detail and it is shown that both are significantly affected by the nonlinearities in the governing equations. In particular, the amplitudes of oscillations reflect a resonant e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.3076","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":"0901.3076","created_at":"2026-05-18T02:14:56.636278+00:00"},{"alias_kind":"arxiv_version","alias_value":"0901.3076v1","created_at":"2026-05-18T02:14:56.636278+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.3076","created_at":"2026-05-18T02:14:56.636278+00:00"},{"alias_kind":"pith_short_12","alias_value":"QRER7CU7PBXX","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_16","alias_value":"QRER7CU7PBXX4AIB","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_8","alias_value":"QRER7CU7","created_at":"2026-05-18T12:26:01.383474+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2601.14979","citing_title":"The relativistic restricted three-body problem: geometry and motion around tidally perturbed black holes","ref_index":81,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/QRER7CU7PBXX4AIB62M7KQ7G2I","json":"https://pith.science/pith/QRER7CU7PBXX4AIB62M7KQ7G2I.json","graph_json":"https://pith.science/api/pith-number/QRER7CU7PBXX4AIB62M7KQ7G2I/graph.json","events_json":"https://pith.science/api/pith-number/QRER7CU7PBXX4AIB62M7KQ7G2I/events.json","paper":"https://pith.science/paper/QRER7CU7"},"agent_actions":{"view_html":"https://pith.science/pith/QRER7CU7PBXX4AIB62M7KQ7G2I","download_json":"https://pith.science/pith/QRER7CU7PBXX4AIB62M7KQ7G2I.json","view_paper":"https://pith.science/paper/QRER7CU7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0901.3076&json=true","fetch_graph":"https://pith.science/api/pith-number/QRER7CU7PBXX4AIB62M7KQ7G2I/graph.json","fetch_events":"https://pith.science/api/pith-number/QRER7CU7PBXX4AIB62M7KQ7G2I/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QRER7CU7PBXX4AIB62M7KQ7G2I/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QRER7CU7PBXX4AIB62M7KQ7G2I/action/storage_attestation","attest_author":"https://pith.science/pith/QRER7CU7PBXX4AIB62M7KQ7G2I/action/author_attestation","sign_citation":"https://pith.science/pith/QRER7CU7PBXX4AIB62M7KQ7G2I/action/citation_signature","submit_replication":"https://pith.science/pith/QRER7CU7PBXX4AIB62M7KQ7G2I/action/replication_record"}},"created_at":"2026-05-18T02:14:56.636278+00:00","updated_at":"2026-05-18T02:14:56.636278+00:00"}