{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:2T2KLD5QL7FRTT3BBRETUWO7QG","short_pith_number":"pith:2T2KLD5Q","canonical_record":{"source":{"id":"1704.08130","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-04-26T14:07:17Z","cross_cats_sorted":[],"title_canon_sha256":"c2d8174c0180850c77a1d63614f19ddafe22678a990df67ede3b3a7e6a7329a7","abstract_canon_sha256":"b011a78333fdeed037d610949cde4c7ea0e396e95a9b68155dcdd2045c1f13fb"},"schema_version":"1.0"},"canonical_sha256":"d4f4a58fb05fcb19cf610c493a59df8182d6b606f41cd25010ca30f10f83367d","source":{"kind":"arxiv","id":"1704.08130","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.08130","created_at":"2026-05-18T00:13:22Z"},{"alias_kind":"arxiv_version","alias_value":"1704.08130v2","created_at":"2026-05-18T00:13:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.08130","created_at":"2026-05-18T00:13:22Z"},{"alias_kind":"pith_short_12","alias_value":"2T2KLD5QL7FR","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"2T2KLD5QL7FRTT3B","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"2T2KLD5Q","created_at":"2026-05-18T12:30:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:2T2KLD5QL7FRTT3BBRETUWO7QG","target":"record","payload":{"canonical_record":{"source":{"id":"1704.08130","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-04-26T14:07:17Z","cross_cats_sorted":[],"title_canon_sha256":"c2d8174c0180850c77a1d63614f19ddafe22678a990df67ede3b3a7e6a7329a7","abstract_canon_sha256":"b011a78333fdeed037d610949cde4c7ea0e396e95a9b68155dcdd2045c1f13fb"},"schema_version":"1.0"},"canonical_sha256":"d4f4a58fb05fcb19cf610c493a59df8182d6b606f41cd25010ca30f10f83367d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:13:22.074742Z","signature_b64":"ftCYc+BpPzQKgA2YStaeMtzHy9srfyq6Mu9EhJJKvTCJGJjh5J0NTjPQPjGG2Mr6xEQZPUyZl5cfBoFg5XPvDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d4f4a58fb05fcb19cf610c493a59df8182d6b606f41cd25010ca30f10f83367d","last_reissued_at":"2026-05-18T00:13:22.074007Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:13:22.074007Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.08130","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":"2026-05-18T00:13:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zol91fTUz60q/tRTX+drAcHqQHTorCCE8LrFPIP9kiorIOU8mrwhQRDnZg1mB3TrrzwzyOCZU3bujV9Gt9eIAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T02:38:14.896581Z"},"content_sha256":"10193a48f2e7d79dd9895c66366de7981066588d90ab528a6f8da0f714614cfb","schema_version":"1.0","event_id":"sha256:10193a48f2e7d79dd9895c66366de7981066588d90ab528a6f8da0f714614cfb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:2T2KLD5QL7FRTT3BBRETUWO7QG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Circumbinary discs: Numerical and physical behaviour","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Daniel Thun, Giovanni Picogna, Wilhelm Kley","submitted_at":"2017-04-26T14:07:17Z","abstract_excerpt":"We study the evolution of circumbinary disks under the gravitational influence of the binary using two-dimensional hydrodynamical simulations to investigate the impact of disk and binary parameters on the dynamical aspects of the disk. To distinguish between physical and numerical effects we apply three hydrodynamical codes. First we analyse in detail numerical issues concerning the conditions at the boundaries and grid resolution. We then perform a series of simulations with different binary (eccentricity, mass ratio) and disk parameters (viscosity, aspect ratio) starting from a reference mod"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.08130","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:13:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wYRXSphHqfZD+1TDJYDvEFvmJDlWhFDMH8R+ctR1CuCO3YA1xUYTpdVj0mCReQHVmqKnu7dSCJ6Pze+VCOuUAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T02:38:14.896932Z"},"content_sha256":"015ce1408dc02b3254c307d1d3056732b71fa4556d9cb769389c1feb504c667c","schema_version":"1.0","event_id":"sha256:015ce1408dc02b3254c307d1d3056732b71fa4556d9cb769389c1feb504c667c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2T2KLD5QL7FRTT3BBRETUWO7QG/bundle.json","state_url":"https://pith.science/pith/2T2KLD5QL7FRTT3BBRETUWO7QG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2T2KLD5QL7FRTT3BBRETUWO7QG/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":"2026-06-01T02:38:14Z","links":{"resolver":"https://pith.science/pith/2T2KLD5QL7FRTT3BBRETUWO7QG","bundle":"https://pith.science/pith/2T2KLD5QL7FRTT3BBRETUWO7QG/bundle.json","state":"https://pith.science/pith/2T2KLD5QL7FRTT3BBRETUWO7QG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2T2KLD5QL7FRTT3BBRETUWO7QG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:2T2KLD5QL7FRTT3BBRETUWO7QG","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":"b011a78333fdeed037d610949cde4c7ea0e396e95a9b68155dcdd2045c1f13fb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-04-26T14:07:17Z","title_canon_sha256":"c2d8174c0180850c77a1d63614f19ddafe22678a990df67ede3b3a7e6a7329a7"},"schema_version":"1.0","source":{"id":"1704.08130","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.08130","created_at":"2026-05-18T00:13:22Z"},{"alias_kind":"arxiv_version","alias_value":"1704.08130v2","created_at":"2026-05-18T00:13:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.08130","created_at":"2026-05-18T00:13:22Z"},{"alias_kind":"pith_short_12","alias_value":"2T2KLD5QL7FR","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"2T2KLD5QL7FRTT3B","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"2T2KLD5Q","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:015ce1408dc02b3254c307d1d3056732b71fa4556d9cb769389c1feb504c667c","target":"graph","created_at":"2026-05-18T00:13:22Z","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 study the evolution of circumbinary disks under the gravitational influence of the binary using two-dimensional hydrodynamical simulations to investigate the impact of disk and binary parameters on the dynamical aspects of the disk. To distinguish between physical and numerical effects we apply three hydrodynamical codes. First we analyse in detail numerical issues concerning the conditions at the boundaries and grid resolution. We then perform a series of simulations with different binary (eccentricity, mass ratio) and disk parameters (viscosity, aspect ratio) starting from a reference mod","authors_text":"Daniel Thun, Giovanni Picogna, Wilhelm Kley","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-04-26T14:07:17Z","title":"Circumbinary discs: Numerical and physical behaviour"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.08130","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":"sha256:10193a48f2e7d79dd9895c66366de7981066588d90ab528a6f8da0f714614cfb","target":"record","created_at":"2026-05-18T00:13:22Z","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":"b011a78333fdeed037d610949cde4c7ea0e396e95a9b68155dcdd2045c1f13fb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-04-26T14:07:17Z","title_canon_sha256":"c2d8174c0180850c77a1d63614f19ddafe22678a990df67ede3b3a7e6a7329a7"},"schema_version":"1.0","source":{"id":"1704.08130","kind":"arxiv","version":2}},"canonical_sha256":"d4f4a58fb05fcb19cf610c493a59df8182d6b606f41cd25010ca30f10f83367d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d4f4a58fb05fcb19cf610c493a59df8182d6b606f41cd25010ca30f10f83367d","first_computed_at":"2026-05-18T00:13:22.074007Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:13:22.074007Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ftCYc+BpPzQKgA2YStaeMtzHy9srfyq6Mu9EhJJKvTCJGJjh5J0NTjPQPjGG2Mr6xEQZPUyZl5cfBoFg5XPvDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:13:22.074742Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.08130","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:10193a48f2e7d79dd9895c66366de7981066588d90ab528a6f8da0f714614cfb","sha256:015ce1408dc02b3254c307d1d3056732b71fa4556d9cb769389c1feb504c667c"],"state_sha256":"302bed3eaaaf6abdd6f958f2a1170a606c5e85f1a0a9f8c11ba2c971bcc224fe"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"asB54b4Vkpr6wdG0sxrJ6ONfPSPjAMZDpEpwilUDU9X65pjzrRJYH0OSxSqkbJxPuV1tNpLP+fk0KNjYjDtaDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T02:38:14.899417Z","bundle_sha256":"418f590ab98663a943097ef4dfc8c79fe60d7dd3955019d9dd9a6f7227430aaf"}}