{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:VFTWNPUZPTPHWNZ45CCTMFPX7I","short_pith_number":"pith:VFTWNPUZ","canonical_record":{"source":{"id":"1904.00985","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-04-01T17:47:17Z","cross_cats_sorted":[],"title_canon_sha256":"d9d568d0c9bf98b4fd7fc164004b9a4b0bf925edc604031b949c2e95f693bc3e","abstract_canon_sha256":"b56473ba9431617506c26fdefd328eb0e318273b657686e05d239d58ebd28897"},"schema_version":"1.0"},"canonical_sha256":"a96766be997cde7b373ce8853615f7fa2526bbcb17f8f16960441c24ca383477","source":{"kind":"arxiv","id":"1904.00985","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.00985","created_at":"2026-05-17T23:48:29Z"},{"alias_kind":"arxiv_version","alias_value":"1904.00985v1","created_at":"2026-05-17T23:48:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.00985","created_at":"2026-05-17T23:48:29Z"},{"alias_kind":"pith_short_12","alias_value":"VFTWNPUZPTPH","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"VFTWNPUZPTPHWNZ4","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"VFTWNPUZ","created_at":"2026-05-18T12:33:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:VFTWNPUZPTPHWNZ45CCTMFPX7I","target":"record","payload":{"canonical_record":{"source":{"id":"1904.00985","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-04-01T17:47:17Z","cross_cats_sorted":[],"title_canon_sha256":"d9d568d0c9bf98b4fd7fc164004b9a4b0bf925edc604031b949c2e95f693bc3e","abstract_canon_sha256":"b56473ba9431617506c26fdefd328eb0e318273b657686e05d239d58ebd28897"},"schema_version":"1.0"},"canonical_sha256":"a96766be997cde7b373ce8853615f7fa2526bbcb17f8f16960441c24ca383477","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:48:29.647910Z","signature_b64":"3zJU7A8aqhjJ7Ata1FDg/s36X9Ig4Zzm/EH+sQXzr+GjwZSB/+Hvye3AcArSCELem/xatUiOma/69Z2ESNxaBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a96766be997cde7b373ce8853615f7fa2526bbcb17f8f16960441c24ca383477","last_reissued_at":"2026-05-17T23:48:29.647484Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:48:29.647484Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.00985","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":"2026-05-17T23:48:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eY6JlDoytf4XzQiX/MLQBAJp0rABr1q1PIFp0QvjIj+qqF54oG81REVezO7lrTkax1FMdQcTLMJLWcLCh7JWBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T05:31:21.259742Z"},"content_sha256":"b68ba83f348615e4cff58a11f2e2a9baf6a71f88d79705ce3349b1071ee6ca14","schema_version":"1.0","event_id":"sha256:b68ba83f348615e4cff58a11f2e2a9baf6a71f88d79705ce3349b1071ee6ca14"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:VFTWNPUZPTPHWNZ45CCTMFPX7I","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Alignment of a circumbinary disc around an eccentric binary with application to KH 15D","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Alessia Franchini, Jeremy L. Smallwood, Rebecca G. Martin, Stephen H. Lubow","submitted_at":"2019-04-01T17:47:17Z","abstract_excerpt":"We analyse the evolution of a mildly inclined circumbinary disc that orbits an eccentric orbit binary by means of smoother particle hydrodynamic (SPH) simulations and linear theory. We show that the alignment process of an initially misaligned circumbinary disc around an eccentric orbit binary is significantly different than around a circular orbit binary and involves tilt oscillations. The more eccentric the binary, the larger the tilt oscillations and the longer it takes to damp these oscillations. A circumbinary disc that is only mildly inclined may increase its inclination by a factor of a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.00985","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":"2026-05-17T23:48:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QxL1j9sdUBl21tab2FTtdmBlyZ2P8UrJbpQ+zuR7iLSfDJfDHkKwUbRUzkLkuUu1gOqKi1QWixbqfCAXtYzdBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T05:31:21.260096Z"},"content_sha256":"679f390b8f060ab4b5a4fde10a76b49dbe633b915d72edc2e7715f8d6c10042d","schema_version":"1.0","event_id":"sha256:679f390b8f060ab4b5a4fde10a76b49dbe633b915d72edc2e7715f8d6c10042d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VFTWNPUZPTPHWNZ45CCTMFPX7I/bundle.json","state_url":"https://pith.science/pith/VFTWNPUZPTPHWNZ45CCTMFPX7I/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VFTWNPUZPTPHWNZ45CCTMFPX7I/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":"2026-06-04T05:31:21Z","links":{"resolver":"https://pith.science/pith/VFTWNPUZPTPHWNZ45CCTMFPX7I","bundle":"https://pith.science/pith/VFTWNPUZPTPHWNZ45CCTMFPX7I/bundle.json","state":"https://pith.science/pith/VFTWNPUZPTPHWNZ45CCTMFPX7I/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VFTWNPUZPTPHWNZ45CCTMFPX7I/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:VFTWNPUZPTPHWNZ45CCTMFPX7I","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":"b56473ba9431617506c26fdefd328eb0e318273b657686e05d239d58ebd28897","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-04-01T17:47:17Z","title_canon_sha256":"d9d568d0c9bf98b4fd7fc164004b9a4b0bf925edc604031b949c2e95f693bc3e"},"schema_version":"1.0","source":{"id":"1904.00985","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.00985","created_at":"2026-05-17T23:48:29Z"},{"alias_kind":"arxiv_version","alias_value":"1904.00985v1","created_at":"2026-05-17T23:48:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.00985","created_at":"2026-05-17T23:48:29Z"},{"alias_kind":"pith_short_12","alias_value":"VFTWNPUZPTPH","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"VFTWNPUZPTPHWNZ4","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"VFTWNPUZ","created_at":"2026-05-18T12:33:30Z"}],"graph_snapshots":[{"event_id":"sha256:679f390b8f060ab4b5a4fde10a76b49dbe633b915d72edc2e7715f8d6c10042d","target":"graph","created_at":"2026-05-17T23:48:29Z","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 analyse the evolution of a mildly inclined circumbinary disc that orbits an eccentric orbit binary by means of smoother particle hydrodynamic (SPH) simulations and linear theory. We show that the alignment process of an initially misaligned circumbinary disc around an eccentric orbit binary is significantly different than around a circular orbit binary and involves tilt oscillations. The more eccentric the binary, the larger the tilt oscillations and the longer it takes to damp these oscillations. A circumbinary disc that is only mildly inclined may increase its inclination by a factor of a","authors_text":"Alessia Franchini, Jeremy L. Smallwood, Rebecca G. Martin, Stephen H. Lubow","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-04-01T17:47:17Z","title":"Alignment of a circumbinary disc around an eccentric binary with application to KH 15D"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.00985","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:b68ba83f348615e4cff58a11f2e2a9baf6a71f88d79705ce3349b1071ee6ca14","target":"record","created_at":"2026-05-17T23:48:29Z","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":"b56473ba9431617506c26fdefd328eb0e318273b657686e05d239d58ebd28897","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-04-01T17:47:17Z","title_canon_sha256":"d9d568d0c9bf98b4fd7fc164004b9a4b0bf925edc604031b949c2e95f693bc3e"},"schema_version":"1.0","source":{"id":"1904.00985","kind":"arxiv","version":1}},"canonical_sha256":"a96766be997cde7b373ce8853615f7fa2526bbcb17f8f16960441c24ca383477","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a96766be997cde7b373ce8853615f7fa2526bbcb17f8f16960441c24ca383477","first_computed_at":"2026-05-17T23:48:29.647484Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:48:29.647484Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3zJU7A8aqhjJ7Ata1FDg/s36X9Ig4Zzm/EH+sQXzr+GjwZSB/+Hvye3AcArSCELem/xatUiOma/69Z2ESNxaBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:48:29.647910Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.00985","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b68ba83f348615e4cff58a11f2e2a9baf6a71f88d79705ce3349b1071ee6ca14","sha256:679f390b8f060ab4b5a4fde10a76b49dbe633b915d72edc2e7715f8d6c10042d"],"state_sha256":"1a7e665656c0b0c944d05f8894bf68a1cb4aa3e4369407bee699bd5073beb5c9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"667i3odr2HYvtyzxxMyjhll8CGRxVC8HK3Sc0JcZg2KpXeFAKb++KR2UwffmzWk4HfQvEYDQf1bkTpsVHU90Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T05:31:21.262129Z","bundle_sha256":"95f910de4f6e52b316ca40c2742c94fedbfd0c836cb2252a9fed9f3be4420742"}}