{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2023:C4SDQ6MFLLDUJ27EUASQD6MKKK","short_pith_number":"pith:C4SDQ6MF","schema_version":"1.0","canonical_sha256":"17243879855ac744ebe4a02501f98a5289a1e3f8fafcef9dc47823d8da27ad43","source":{"kind":"arxiv","id":"2307.08756","version":3},"attestation_state":"computed","paper":{"title":"Reviving stochasticity: uncertainty in SMBH binary eccentricity is unavoidable","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alexander Rawlings, Matias Mannerkoski, Peter H. Johansson, Thorsten Naab","submitted_at":"2023-07-17T18:01:04Z","abstract_excerpt":"We study supermassive black hole (SMBH) binary eccentricity of equal-mass galaxy mergers in $N$-body simulations with the KETJU code, which combines the GAGDET-4 fast multipole gravity solver with accurate regularised integration and post-Newtonian corrections around SMBHs. In simulations with realistic, high eccentricity galactic merger orbits, the hard binary eccentricity is found to be a non-linear function of the deflection angle in the SMBH orbit during the final, nearly radial close encounter between the SMBHs before they form a bound binary. This mapping between the deflection angle and"},"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":"2307.08756","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-07-17T18:01:04Z","cross_cats_sorted":[],"title_canon_sha256":"bf42fd95508e444d88bfb8323e666f76809b7fbcab987523ba3ef0c7738e3643","abstract_canon_sha256":"b9e424b491e24fb86042af9eb4f16421e7a2eaebc7f5a2aa5cb6a878f4369a8d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:52:48.718498Z","signature_b64":"UklDgYVXJJ+2If5YRTv9Z/I6x3LE/yKFtmgmksDb75lkAfVn9lDJDD9ZjgYqyt+24kGP6Cj/+eGZ1MU9nl81BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"17243879855ac744ebe4a02501f98a5289a1e3f8fafcef9dc47823d8da27ad43","last_reissued_at":"2026-07-05T06:52:48.718021Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:52:48.718021Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Reviving stochasticity: uncertainty in SMBH binary eccentricity is unavoidable","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alexander Rawlings, Matias Mannerkoski, Peter H. Johansson, Thorsten Naab","submitted_at":"2023-07-17T18:01:04Z","abstract_excerpt":"We study supermassive black hole (SMBH) binary eccentricity of equal-mass galaxy mergers in $N$-body simulations with the KETJU code, which combines the GAGDET-4 fast multipole gravity solver with accurate regularised integration and post-Newtonian corrections around SMBHs. In simulations with realistic, high eccentricity galactic merger orbits, the hard binary eccentricity is found to be a non-linear function of the deflection angle in the SMBH orbit during the final, nearly radial close encounter between the SMBHs before they form a bound binary. This mapping between the deflection angle and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.08756","kind":"arxiv","version":3},"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/2307.08756/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2307.08756","created_at":"2026-07-05T06:52:48.718082+00:00"},{"alias_kind":"arxiv_version","alias_value":"2307.08756v3","created_at":"2026-07-05T06:52:48.718082+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.08756","created_at":"2026-07-05T06:52:48.718082+00:00"},{"alias_kind":"pith_short_12","alias_value":"C4SDQ6MFLLDU","created_at":"2026-07-05T06:52:48.718082+00:00"},{"alias_kind":"pith_short_16","alias_value":"C4SDQ6MFLLDUJ27E","created_at":"2026-07-05T06:52:48.718082+00:00"},{"alias_kind":"pith_short_8","alias_value":"C4SDQ6MF","created_at":"2026-07-05T06:52:48.718082+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/C4SDQ6MFLLDUJ27EUASQD6MKKK","json":"https://pith.science/pith/C4SDQ6MFLLDUJ27EUASQD6MKKK.json","graph_json":"https://pith.science/api/pith-number/C4SDQ6MFLLDUJ27EUASQD6MKKK/graph.json","events_json":"https://pith.science/api/pith-number/C4SDQ6MFLLDUJ27EUASQD6MKKK/events.json","paper":"https://pith.science/paper/C4SDQ6MF"},"agent_actions":{"view_html":"https://pith.science/pith/C4SDQ6MFLLDUJ27EUASQD6MKKK","download_json":"https://pith.science/pith/C4SDQ6MFLLDUJ27EUASQD6MKKK.json","view_paper":"https://pith.science/paper/C4SDQ6MF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2307.08756&json=true","fetch_graph":"https://pith.science/api/pith-number/C4SDQ6MFLLDUJ27EUASQD6MKKK/graph.json","fetch_events":"https://pith.science/api/pith-number/C4SDQ6MFLLDUJ27EUASQD6MKKK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/C4SDQ6MFLLDUJ27EUASQD6MKKK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/C4SDQ6MFLLDUJ27EUASQD6MKKK/action/storage_attestation","attest_author":"https://pith.science/pith/C4SDQ6MFLLDUJ27EUASQD6MKKK/action/author_attestation","sign_citation":"https://pith.science/pith/C4SDQ6MFLLDUJ27EUASQD6MKKK/action/citation_signature","submit_replication":"https://pith.science/pith/C4SDQ6MFLLDUJ27EUASQD6MKKK/action/replication_record"}},"created_at":"2026-07-05T06:52:48.718082+00:00","updated_at":"2026-07-05T06:52:48.718082+00:00"}