{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:5OCQMYPBDABFUDLRR4DYJHG3FV","short_pith_number":"pith:5OCQMYPB","canonical_record":{"source":{"id":"1512.05788","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-12-17T21:00:59Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"1d006cb1b61beb3bed9977aa433f8a1d1fbfbb02e5a1d8941d68e955629593e6","abstract_canon_sha256":"3b6c5690452dd2be2c8fd78b6b2b5d7693ddc4107ae5f510204daaf5f1a1f615"},"schema_version":"1.0"},"canonical_sha256":"eb850661e118025a0d718f07849cdb2d5635d87d6c49cc1f1cf04027582202f6","source":{"kind":"arxiv","id":"1512.05788","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.05788","created_at":"2026-05-18T01:15:22Z"},{"alias_kind":"arxiv_version","alias_value":"1512.05788v2","created_at":"2026-05-18T01:15:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.05788","created_at":"2026-05-18T01:15:22Z"},{"alias_kind":"pith_short_12","alias_value":"5OCQMYPBDABF","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"5OCQMYPBDABFUDLR","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"5OCQMYPB","created_at":"2026-05-18T12:29:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:5OCQMYPBDABFUDLRR4DYJHG3FV","target":"record","payload":{"canonical_record":{"source":{"id":"1512.05788","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-12-17T21:00:59Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"1d006cb1b61beb3bed9977aa433f8a1d1fbfbb02e5a1d8941d68e955629593e6","abstract_canon_sha256":"3b6c5690452dd2be2c8fd78b6b2b5d7693ddc4107ae5f510204daaf5f1a1f615"},"schema_version":"1.0"},"canonical_sha256":"eb850661e118025a0d718f07849cdb2d5635d87d6c49cc1f1cf04027582202f6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:15:22.872329Z","signature_b64":"NPrxsISaxFv+fphXXnXhTNxrvRkT4LiNmN0chTHKj0qKsCQCNNeLQBKwBddGWz8hwkA0RQ7kb+NOk7FdQvXtCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eb850661e118025a0d718f07849cdb2d5635d87d6c49cc1f1cf04027582202f6","last_reissued_at":"2026-05-18T01:15:22.871590Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:15:22.871590Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.05788","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":"2026-05-18T01:15:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gKNitP7WDNfchVhFOg8DInyAtCB2s1IZVheIA055AIMwik0+WEZgso3Sl3qqrpPP4tCHzENpoKaK/GwBcknIBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T03:01:05.821006Z"},"content_sha256":"9a5a17b6589d898033098a399b12e105144272b2f475caed56f8bdf30e0b04ac","schema_version":"1.0","event_id":"sha256:9a5a17b6589d898033098a399b12e105144272b2f475caed56f8bdf30e0b04ac"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:5OCQMYPBDABFUDLRR4DYJHG3FV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A transition in circumbinary accretion discs at a binary mass ratio of 1:25","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.HE","authors_text":"Andrew I. MacFadyen, Brian D. Farris, Daniel J. D'Orazio, Paul Duffell, Zoltan Haiman","submitted_at":"2015-12-17T21:00:59Z","abstract_excerpt":"We study circumbinary accretion discs in the framework of the restricted three-body problem (R3Bp) and via numerically solving the height-integrated equations of viscous hydrodynamics. Varying the mass ratio of the binary, we find a pronounced change in the behaviour of the disc near mass ratio $q \\equiv M_s/M_p \\sim 0.04$. For mass ratios above $q=0.04$, solutions for the hydrodynamic flow transition from steady, to strongly-fluctuating; a narrow annular gap in the surface density around the secondary's orbit changes to a hollow central cavity; and a spatial symmetry is lost, resulting in a l"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.05788","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":"2026-05-18T01:15:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"640oC57Umadwo2vql/uAZ2wOkfWFyBI3B5QjoB0DnAU0GlZHA5sInFokxOwhJGdxCzQnKO+VCv8QtS0cCY0MCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T03:01:05.821759Z"},"content_sha256":"fe40f88e10dc8b8830bb08db462ba9e6020a5ec97e5969ca42f5f435325eebc4","schema_version":"1.0","event_id":"sha256:fe40f88e10dc8b8830bb08db462ba9e6020a5ec97e5969ca42f5f435325eebc4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5OCQMYPBDABFUDLRR4DYJHG3FV/bundle.json","state_url":"https://pith.science/pith/5OCQMYPBDABFUDLRR4DYJHG3FV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5OCQMYPBDABFUDLRR4DYJHG3FV/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":"2026-05-31T03:01:05Z","links":{"resolver":"https://pith.science/pith/5OCQMYPBDABFUDLRR4DYJHG3FV","bundle":"https://pith.science/pith/5OCQMYPBDABFUDLRR4DYJHG3FV/bundle.json","state":"https://pith.science/pith/5OCQMYPBDABFUDLRR4DYJHG3FV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5OCQMYPBDABFUDLRR4DYJHG3FV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:5OCQMYPBDABFUDLRR4DYJHG3FV","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":"3b6c5690452dd2be2c8fd78b6b2b5d7693ddc4107ae5f510204daaf5f1a1f615","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-12-17T21:00:59Z","title_canon_sha256":"1d006cb1b61beb3bed9977aa433f8a1d1fbfbb02e5a1d8941d68e955629593e6"},"schema_version":"1.0","source":{"id":"1512.05788","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.05788","created_at":"2026-05-18T01:15:22Z"},{"alias_kind":"arxiv_version","alias_value":"1512.05788v2","created_at":"2026-05-18T01:15:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.05788","created_at":"2026-05-18T01:15:22Z"},{"alias_kind":"pith_short_12","alias_value":"5OCQMYPBDABF","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"5OCQMYPBDABFUDLR","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"5OCQMYPB","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:fe40f88e10dc8b8830bb08db462ba9e6020a5ec97e5969ca42f5f435325eebc4","target":"graph","created_at":"2026-05-18T01:15:22Z","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 circumbinary accretion discs in the framework of the restricted three-body problem (R3Bp) and via numerically solving the height-integrated equations of viscous hydrodynamics. Varying the mass ratio of the binary, we find a pronounced change in the behaviour of the disc near mass ratio $q \\equiv M_s/M_p \\sim 0.04$. For mass ratios above $q=0.04$, solutions for the hydrodynamic flow transition from steady, to strongly-fluctuating; a narrow annular gap in the surface density around the secondary's orbit changes to a hollow central cavity; and a spatial symmetry is lost, resulting in a l","authors_text":"Andrew I. MacFadyen, Brian D. Farris, Daniel J. D'Orazio, Paul Duffell, Zoltan Haiman","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-12-17T21:00:59Z","title":"A transition in circumbinary accretion discs at a binary mass ratio of 1:25"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.05788","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":"sha256:9a5a17b6589d898033098a399b12e105144272b2f475caed56f8bdf30e0b04ac","target":"record","created_at":"2026-05-18T01:15:22Z","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":"3b6c5690452dd2be2c8fd78b6b2b5d7693ddc4107ae5f510204daaf5f1a1f615","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-12-17T21:00:59Z","title_canon_sha256":"1d006cb1b61beb3bed9977aa433f8a1d1fbfbb02e5a1d8941d68e955629593e6"},"schema_version":"1.0","source":{"id":"1512.05788","kind":"arxiv","version":2}},"canonical_sha256":"eb850661e118025a0d718f07849cdb2d5635d87d6c49cc1f1cf04027582202f6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eb850661e118025a0d718f07849cdb2d5635d87d6c49cc1f1cf04027582202f6","first_computed_at":"2026-05-18T01:15:22.871590Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:15:22.871590Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NPrxsISaxFv+fphXXnXhTNxrvRkT4LiNmN0chTHKj0qKsCQCNNeLQBKwBddGWz8hwkA0RQ7kb+NOk7FdQvXtCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:15:22.872329Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.05788","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9a5a17b6589d898033098a399b12e105144272b2f475caed56f8bdf30e0b04ac","sha256:fe40f88e10dc8b8830bb08db462ba9e6020a5ec97e5969ca42f5f435325eebc4"],"state_sha256":"9ad40477d2e24a14deda8d76ee70a6fbaf2406d9343132d3e85710b6aaf8dd0e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0gJoT19c2nWzELsW9Gq5zhdkgaj8NrmG43DaRUEz2RO+w6tuqC6oLcTcJ57bwewZHmB8R9TzOqqRfKUX7OkRBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T03:01:05.825427Z","bundle_sha256":"276d44e9526069301bdea8545996c7cadf2fde85f723b6e76e8e64e2a83cf55d"}}