{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:273NFII2HVLFGCAUPOR4VUPHFJ","short_pith_number":"pith:273NFII2","canonical_record":{"source":{"id":"2009.10738","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-09-22T18:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"f730e479af4556652caed0391628de0ddc3346085acc890cb550f0d5d7a9d18a","abstract_canon_sha256":"dfd73d6d7191dc4f91b6c5815fe1e6b9f215583b692c9b3b4be5d1b87e06055d"},"schema_version":"1.0"},"canonical_sha256":"d7f6d2a11a3d565308147ba3cad1e72a52354aba5edab8890d0cd9aa0270709a","source":{"kind":"arxiv","id":"2009.10738","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.10738","created_at":"2026-07-05T03:01:21Z"},{"alias_kind":"arxiv_version","alias_value":"2009.10738v2","created_at":"2026-07-05T03:01:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.10738","created_at":"2026-07-05T03:01:21Z"},{"alias_kind":"pith_short_12","alias_value":"273NFII2HVLF","created_at":"2026-07-05T03:01:21Z"},{"alias_kind":"pith_short_16","alias_value":"273NFII2HVLFGCAU","created_at":"2026-07-05T03:01:21Z"},{"alias_kind":"pith_short_8","alias_value":"273NFII2","created_at":"2026-07-05T03:01:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:273NFII2HVLFGCAUPOR4VUPHFJ","target":"record","payload":{"canonical_record":{"source":{"id":"2009.10738","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-09-22T18:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"f730e479af4556652caed0391628de0ddc3346085acc890cb550f0d5d7a9d18a","abstract_canon_sha256":"dfd73d6d7191dc4f91b6c5815fe1e6b9f215583b692c9b3b4be5d1b87e06055d"},"schema_version":"1.0"},"canonical_sha256":"d7f6d2a11a3d565308147ba3cad1e72a52354aba5edab8890d0cd9aa0270709a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:01:21.655749Z","signature_b64":"ohvys/s+WEHYYpSsFDu3aDaU2jSo80HHgPsXd19PL7kXOcuK0vtjLPpXuc1WVlaIekcOZymBiEPbK63QBnqoAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d7f6d2a11a3d565308147ba3cad1e72a52354aba5edab8890d0cd9aa0270709a","last_reissued_at":"2026-07-05T03:01:21.655283Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:01:21.655283Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2009.10738","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:01:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"43VKLIN2eeYI2aJpbgvXqcQeC+GJRoadCpiDGrhe1i3qkbGAlzEgi6sVU+NeWqxwJnOB3WZCIesswTPNzsugCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T16:05:44.060430Z"},"content_sha256":"eb5a762151a9087eefff08b652e68ee781ee37792559a1e05e4bdaadadc3c5a0","schema_version":"1.0","event_id":"sha256:eb5a762151a9087eefff08b652e68ee781ee37792559a1e05e4bdaadadc3c5a0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:273NFII2HVLFGCAUPOR4VUPHFJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The evolution of large cavities and disc eccentricity in circumbinary discs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Daniel J. Price, Enrico Ragusa, Josh Calcino, Kieran Hirsh, Richard Alexander","submitted_at":"2020-09-22T18:00:04Z","abstract_excerpt":"We study the mutual evolution of the orbital properties of high mass ratio, circular, co-planar binaries and their surrounding discs, using 3D Smoothed Particle Hydrodynamics simulations. We investigate the evolution of binary and disc eccentricity, cavity structure and the formation of orbiting azimuthal over-dense features in the disc. Even with circular initial conditions, all discs with mass ratios $q>0.05$ develop eccentricity. We find that disc eccentricity grows abruptly after a relatively long time-scale ($\\sim 400\\textrm{--}700$ binary orbits), and is associated with a very small incr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.10738","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2009.10738/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:01:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jbSlDtbA81N8C90KoKejm+uL5xl+vunodmZwMOC58Lv6zrHmkIMuO/t6Z4oIre7XmijicqN+Ng6LyvSt1LtnCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T16:05:44.061514Z"},"content_sha256":"bbe96ea17cbb4645b9560123761d7dca13219b10f2009762ce4ef56a76e7193d","schema_version":"1.0","event_id":"sha256:bbe96ea17cbb4645b9560123761d7dca13219b10f2009762ce4ef56a76e7193d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/273NFII2HVLFGCAUPOR4VUPHFJ/bundle.json","state_url":"https://pith.science/pith/273NFII2HVLFGCAUPOR4VUPHFJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/273NFII2HVLFGCAUPOR4VUPHFJ/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":"2026-08-16T16:05:44Z","links":{"resolver":"https://pith.science/pith/273NFII2HVLFGCAUPOR4VUPHFJ","bundle":"https://pith.science/pith/273NFII2HVLFGCAUPOR4VUPHFJ/bundle.json","state":"https://pith.science/pith/273NFII2HVLFGCAUPOR4VUPHFJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/273NFII2HVLFGCAUPOR4VUPHFJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:273NFII2HVLFGCAUPOR4VUPHFJ","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":"dfd73d6d7191dc4f91b6c5815fe1e6b9f215583b692c9b3b4be5d1b87e06055d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-09-22T18:00:04Z","title_canon_sha256":"f730e479af4556652caed0391628de0ddc3346085acc890cb550f0d5d7a9d18a"},"schema_version":"1.0","source":{"id":"2009.10738","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.10738","created_at":"2026-07-05T03:01:21Z"},{"alias_kind":"arxiv_version","alias_value":"2009.10738v2","created_at":"2026-07-05T03:01:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.10738","created_at":"2026-07-05T03:01:21Z"},{"alias_kind":"pith_short_12","alias_value":"273NFII2HVLF","created_at":"2026-07-05T03:01:21Z"},{"alias_kind":"pith_short_16","alias_value":"273NFII2HVLFGCAU","created_at":"2026-07-05T03:01:21Z"},{"alias_kind":"pith_short_8","alias_value":"273NFII2","created_at":"2026-07-05T03:01:21Z"}],"graph_snapshots":[{"event_id":"sha256:bbe96ea17cbb4645b9560123761d7dca13219b10f2009762ce4ef56a76e7193d","target":"graph","created_at":"2026-07-05T03:01:21Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2009.10738/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study the mutual evolution of the orbital properties of high mass ratio, circular, co-planar binaries and their surrounding discs, using 3D Smoothed Particle Hydrodynamics simulations. We investigate the evolution of binary and disc eccentricity, cavity structure and the formation of orbiting azimuthal over-dense features in the disc. Even with circular initial conditions, all discs with mass ratios $q>0.05$ develop eccentricity. We find that disc eccentricity grows abruptly after a relatively long time-scale ($\\sim 400\\textrm{--}700$ binary orbits), and is associated with a very small incr","authors_text":"Daniel J. Price, Enrico Ragusa, Josh Calcino, Kieran Hirsh, Richard Alexander","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-09-22T18:00:04Z","title":"The evolution of large cavities and disc eccentricity in circumbinary discs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.10738","kind":"arxiv","version":2},"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:eb5a762151a9087eefff08b652e68ee781ee37792559a1e05e4bdaadadc3c5a0","target":"record","created_at":"2026-07-05T03:01:21Z","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":"dfd73d6d7191dc4f91b6c5815fe1e6b9f215583b692c9b3b4be5d1b87e06055d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-09-22T18:00:04Z","title_canon_sha256":"f730e479af4556652caed0391628de0ddc3346085acc890cb550f0d5d7a9d18a"},"schema_version":"1.0","source":{"id":"2009.10738","kind":"arxiv","version":2}},"canonical_sha256":"d7f6d2a11a3d565308147ba3cad1e72a52354aba5edab8890d0cd9aa0270709a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d7f6d2a11a3d565308147ba3cad1e72a52354aba5edab8890d0cd9aa0270709a","first_computed_at":"2026-07-05T03:01:21.655283Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:01:21.655283Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ohvys/s+WEHYYpSsFDu3aDaU2jSo80HHgPsXd19PL7kXOcuK0vtjLPpXuc1WVlaIekcOZymBiEPbK63QBnqoAw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:01:21.655749Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.10738","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb5a762151a9087eefff08b652e68ee781ee37792559a1e05e4bdaadadc3c5a0","sha256:bbe96ea17cbb4645b9560123761d7dca13219b10f2009762ce4ef56a76e7193d"],"state_sha256":"f8850793c4c355333b670be07ce9576ebde7114d2ca3237d6b38a553acbc859e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3EGmGR/Hs9A7Fal0NIiPr+wUZP51YkSgvCwUQW+uca3KqP0fz/+HMik6kKEpKqiXrKD/22QI7QoWzZv8aAT8BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T16:05:44.067677Z","bundle_sha256":"69ea0f6c28474330105843b81e5f5e102c033a29cbdcd1019d33f1e86cf6f436"}}