{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:CMGNTDBPSWEO2HHNY2AXT7SQ5O","short_pith_number":"pith:CMGNTDBP","schema_version":"1.0","canonical_sha256":"130cd98c2f9588ed1cedc68179fe50eb830e688684880806aea8574204731289","source":{"kind":"arxiv","id":"1307.6569","version":1},"attestation_state":"computed","paper":{"title":"Alignment of supermassive black hole binary orbits and spins","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Julian H. Krolik (Johns Hopkins University), M. Coleman Miller (University of Maryland)","submitted_at":"2013-07-24T20:07:38Z","abstract_excerpt":"Recent studies of accretion onto supermassive black hole binaries suggest that much, perhaps most, of the matter eventually accretes onto one hole or the other. If so, then for binaries whose inspiral from ~1 pc to 0.001 - 0.01 pc is driven by interaction with external gas, both the binary orbital axis and the individual black hole spins can be reoriented by angular momentum exchange with this gas. Here we show that, unless the binary mass ratio is far from unity, the spins of the individual holes align with the binary orbital axis in a time few-100 times shorter than the binary orbital axis a"},"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":"1307.6569","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-07-24T20:07:38Z","cross_cats_sorted":[],"title_canon_sha256":"9db67bcb3e77afe935f6f1c3b99d4b86cd5eee6b429b26cf5f89bc15ccf70327","abstract_canon_sha256":"74a9a90389519abeefd088d6713e81e4e027b75f58edb84de4ab9826b65e9cd1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:48:40.420129Z","signature_b64":"zgARWtSs9i7M/ftjamlsEb7WtEdWSjsHY+FOEh1xgxahCUhdsGHCQ7GcNgPC+cOVQRmQ8xh4v9cDnuiEj1N0Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"130cd98c2f9588ed1cedc68179fe50eb830e688684880806aea8574204731289","last_reissued_at":"2026-05-18T01:48:40.419597Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:48:40.419597Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Alignment of supermassive black hole binary orbits and spins","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Julian H. Krolik (Johns Hopkins University), M. Coleman Miller (University of Maryland)","submitted_at":"2013-07-24T20:07:38Z","abstract_excerpt":"Recent studies of accretion onto supermassive black hole binaries suggest that much, perhaps most, of the matter eventually accretes onto one hole or the other. If so, then for binaries whose inspiral from ~1 pc to 0.001 - 0.01 pc is driven by interaction with external gas, both the binary orbital axis and the individual black hole spins can be reoriented by angular momentum exchange with this gas. Here we show that, unless the binary mass ratio is far from unity, the spins of the individual holes align with the binary orbital axis in a time few-100 times shorter than the binary orbital axis a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.6569","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1307.6569","created_at":"2026-05-18T01:48:40.419687+00:00"},{"alias_kind":"arxiv_version","alias_value":"1307.6569v1","created_at":"2026-05-18T01:48:40.419687+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.6569","created_at":"2026-05-18T01:48:40.419687+00:00"},{"alias_kind":"pith_short_12","alias_value":"CMGNTDBPSWEO","created_at":"2026-05-18T12:27:40.988391+00:00"},{"alias_kind":"pith_short_16","alias_value":"CMGNTDBPSWEO2HHN","created_at":"2026-05-18T12:27:40.988391+00:00"},{"alias_kind":"pith_short_8","alias_value":"CMGNTDBP","created_at":"2026-05-18T12:27:40.988391+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":2,"sample":[{"citing_arxiv_id":"2111.08065","citing_title":"The Bardeen-Petterson effect in accreting supermassive black-hole binaries: disc breaking and critical obliquity","ref_index":35,"is_internal_anchor":true},{"citing_arxiv_id":"2601.23019","citing_title":"Toward claiming a detection of gravitational memory","ref_index":117,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/CMGNTDBPSWEO2HHNY2AXT7SQ5O","json":"https://pith.science/pith/CMGNTDBPSWEO2HHNY2AXT7SQ5O.json","graph_json":"https://pith.science/api/pith-number/CMGNTDBPSWEO2HHNY2AXT7SQ5O/graph.json","events_json":"https://pith.science/api/pith-number/CMGNTDBPSWEO2HHNY2AXT7SQ5O/events.json","paper":"https://pith.science/paper/CMGNTDBP"},"agent_actions":{"view_html":"https://pith.science/pith/CMGNTDBPSWEO2HHNY2AXT7SQ5O","download_json":"https://pith.science/pith/CMGNTDBPSWEO2HHNY2AXT7SQ5O.json","view_paper":"https://pith.science/paper/CMGNTDBP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1307.6569&json=true","fetch_graph":"https://pith.science/api/pith-number/CMGNTDBPSWEO2HHNY2AXT7SQ5O/graph.json","fetch_events":"https://pith.science/api/pith-number/CMGNTDBPSWEO2HHNY2AXT7SQ5O/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/CMGNTDBPSWEO2HHNY2AXT7SQ5O/action/timestamp_anchor","attest_storage":"https://pith.science/pith/CMGNTDBPSWEO2HHNY2AXT7SQ5O/action/storage_attestation","attest_author":"https://pith.science/pith/CMGNTDBPSWEO2HHNY2AXT7SQ5O/action/author_attestation","sign_citation":"https://pith.science/pith/CMGNTDBPSWEO2HHNY2AXT7SQ5O/action/citation_signature","submit_replication":"https://pith.science/pith/CMGNTDBPSWEO2HHNY2AXT7SQ5O/action/replication_record"}},"created_at":"2026-05-18T01:48:40.419687+00:00","updated_at":"2026-05-18T01:48:40.419687+00:00"}