{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:3BQGKHBQ3QLYOIKDMCSYCRW6Q2","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":"a7baf18b3be44e7a7fd35126aaafbfd802646098be3b16ba141e7ccd064b5f64","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-12T15:08:24Z","title_canon_sha256":"2b345d519a147206d40694909bbe4f9885fcbbb3896aff248215ecc63c204dd2"},"schema_version":"1.0","source":{"id":"0905.1689","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.1689","created_at":"2026-05-18T02:13:45Z"},{"alias_kind":"arxiv_version","alias_value":"0905.1689v2","created_at":"2026-05-18T02:13:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.1689","created_at":"2026-05-18T02:13:45Z"},{"alias_kind":"pith_short_12","alias_value":"3BQGKHBQ3QLY","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"3BQGKHBQ3QLYOIKD","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"3BQGKHBQ","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:650fdcb63ffcdf5d27210bb2e06a48831f4e43f92bb38beb36dbef4bff5464ec","target":"graph","created_at":"2026-05-18T02:13:45Z","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 employ cosmological hydrodynamical simulations to study the growth of massive black holes (BHs) at high redshifts subject to BH merger recoils from gravitational wave emission. We select the most massive dark matter halo at z=6 from the Millennium simulation, and resimulate its formation at much higher resolution including gas physics and a model for BH seeding, growth and feedback. Assuming that the initial BH seeds are relatively massive, of the order of 10^5 Msun, and that seeding occurs around z~15 in dark matter haloes of mass 10^9-10^10 Msun, we find that it is possible to build up su","authors_text":"(2) Max-Planck-Institute for Astrophysics, Cambridge, Debora Sijacki (1), Garching), Institute of Astronomy, Martin G. Haehnelt (1) ((1) Kavli Institute for Cosmology, University of Cambridge, Volker Springel (2)","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-12T15:08:24Z","title":"Growing the first bright quasars in cosmological simulations of structure formation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.1689","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":"sha256:9880560919817597a5552b253dc5ea7c645fc2658a66879fa4209cffec688f4d","target":"record","created_at":"2026-05-18T02:13:45Z","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":"a7baf18b3be44e7a7fd35126aaafbfd802646098be3b16ba141e7ccd064b5f64","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-12T15:08:24Z","title_canon_sha256":"2b345d519a147206d40694909bbe4f9885fcbbb3896aff248215ecc63c204dd2"},"schema_version":"1.0","source":{"id":"0905.1689","kind":"arxiv","version":2}},"canonical_sha256":"d860651c30dc1787214360a58146de86b5f715bdc8f08a2660b943554dad9ea6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d860651c30dc1787214360a58146de86b5f715bdc8f08a2660b943554dad9ea6","first_computed_at":"2026-05-18T02:13:45.807422Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:45.807422Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GKLlO8k/U6Xx0E4ix6op/W0nOQM8oc686dvMqMvbtf+bgO87lL97gyy0y5IGVqARPzBpO1n6uuPIMLgpayqzDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:45.808008Z","signed_message":"canonical_sha256_bytes"},"source_id":"0905.1689","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9880560919817597a5552b253dc5ea7c645fc2658a66879fa4209cffec688f4d","sha256:650fdcb63ffcdf5d27210bb2e06a48831f4e43f92bb38beb36dbef4bff5464ec"],"state_sha256":"871d4159c4c66c8bf6b5f0736a4ca4e517d19dfcb8c9eb6d18750321af211d90"}