{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2020:OL6BUN5OWD5OYFOXHE2NPRRDXJ","short_pith_number":"pith:OL6BUN5O","schema_version":"1.0","canonical_sha256":"72fc1a37aeb0faec15d73934d7c623ba5ca2a55dc5af5a3754462865c183ba6e","source":{"kind":"arxiv","id":"2009.13505","version":2},"attestation_state":"computed","paper":{"title":"The mass assembly of high-redshift black holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Marta Volonteri, Olmo Piana, Pratika Dayal, Tirthankar Roy Choudhury","submitted_at":"2020-09-28T17:55:28Z","abstract_excerpt":"We use the Delphi semi-analytic model to study the mass assembly and properties of high-redshift ($z>4$) black holes over a wide mass range, $10^3 < M_{bh}/M_\\odot < 10^{10}$. Our black hole growth implementation includes a critical halo mass ($M_{h}^{crit}$) below which the black hole is starved and above which it is allowed to grow either at the Eddington limit or proportionally to the gas content of the galaxy. As a consequence, after an initial growth phase dominated by black hole mergers down to $z \\sim 7 (9)$, supermassive black holes in $z=4$ halo masses of $M_h|_{z=4} \\sim 10^{11.75} ~"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2009.13505","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-28T17:55:28Z","cross_cats_sorted":[],"title_canon_sha256":"1ca8c883e978f467b48136fa21f6f3eab291df0d9122a9135ccc1716244dbf28","abstract_canon_sha256":"cef8248c7daa0e04d2f3cbf84fd09e49b673cfd02fd8970a46383f8fa1f7aaec"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:48:55.704706Z","signature_b64":"HZRqwEKocCqvQxIht+UL+Uz8QOXhBzEcj15Z5/steKDjrsCAKRH+5sf8PgdoG0Cx0QDl+DustAhxgF+f2pdlDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"72fc1a37aeb0faec15d73934d7c623ba5ca2a55dc5af5a3754462865c183ba6e","last_reissued_at":"2026-07-05T01:48:55.704334Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:48:55.704334Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The mass assembly of high-redshift black holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Marta Volonteri, Olmo Piana, Pratika Dayal, Tirthankar Roy Choudhury","submitted_at":"2020-09-28T17:55:28Z","abstract_excerpt":"We use the Delphi semi-analytic model to study the mass assembly and properties of high-redshift ($z>4$) black holes over a wide mass range, $10^3 < M_{bh}/M_\\odot < 10^{10}$. Our black hole growth implementation includes a critical halo mass ($M_{h}^{crit}$) below which the black hole is starved and above which it is allowed to grow either at the Eddington limit or proportionally to the gas content of the galaxy. As a consequence, after an initial growth phase dominated by black hole mergers down to $z \\sim 7 (9)$, supermassive black holes in $z=4$ halo masses of $M_h|_{z=4} \\sim 10^{11.75} ~"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.13505","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2009.13505/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":"2009.13505","created_at":"2026-07-05T01:48:55.704400+00:00"},{"alias_kind":"arxiv_version","alias_value":"2009.13505v2","created_at":"2026-07-05T01:48:55.704400+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.13505","created_at":"2026-07-05T01:48:55.704400+00:00"},{"alias_kind":"pith_short_12","alias_value":"OL6BUN5OWD5O","created_at":"2026-07-05T01:48:55.704400+00:00"},{"alias_kind":"pith_short_16","alias_value":"OL6BUN5OWD5OYFOX","created_at":"2026-07-05T01:48:55.704400+00:00"},{"alias_kind":"pith_short_8","alias_value":"OL6BUN5O","created_at":"2026-07-05T01:48:55.704400+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2411.17177","citing_title":"Gravitational waves and cosmic boundary","ref_index":45,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/OL6BUN5OWD5OYFOXHE2NPRRDXJ","json":"https://pith.science/pith/OL6BUN5OWD5OYFOXHE2NPRRDXJ.json","graph_json":"https://pith.science/api/pith-number/OL6BUN5OWD5OYFOXHE2NPRRDXJ/graph.json","events_json":"https://pith.science/api/pith-number/OL6BUN5OWD5OYFOXHE2NPRRDXJ/events.json","paper":"https://pith.science/paper/OL6BUN5O"},"agent_actions":{"view_html":"https://pith.science/pith/OL6BUN5OWD5OYFOXHE2NPRRDXJ","download_json":"https://pith.science/pith/OL6BUN5OWD5OYFOXHE2NPRRDXJ.json","view_paper":"https://pith.science/paper/OL6BUN5O","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2009.13505&json=true","fetch_graph":"https://pith.science/api/pith-number/OL6BUN5OWD5OYFOXHE2NPRRDXJ/graph.json","fetch_events":"https://pith.science/api/pith-number/OL6BUN5OWD5OYFOXHE2NPRRDXJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/OL6BUN5OWD5OYFOXHE2NPRRDXJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/OL6BUN5OWD5OYFOXHE2NPRRDXJ/action/storage_attestation","attest_author":"https://pith.science/pith/OL6BUN5OWD5OYFOXHE2NPRRDXJ/action/author_attestation","sign_citation":"https://pith.science/pith/OL6BUN5OWD5OYFOXHE2NPRRDXJ/action/citation_signature","submit_replication":"https://pith.science/pith/OL6BUN5OWD5OYFOXHE2NPRRDXJ/action/replication_record"}},"created_at":"2026-07-05T01:48:55.704400+00:00","updated_at":"2026-07-05T01:48:55.704400+00:00"}