{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:B7TC7IKCXKY6FC5PCM4GWXYKBC","short_pith_number":"pith:B7TC7IKC","schema_version":"1.0","canonical_sha256":"0fe62fa142bab1e28baf13386b5f0a088b080bcba029155c3f19960c61a55339","source":{"kind":"arxiv","id":"0806.3459","version":1},"attestation_state":"computed","paper":{"title":"The Evolution of the M_BH-sigma relation Inferred from the Age Distribution of Local Early-Type Galaxies and AGN Evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Francesco Shankar (OSU), Mariangela Bernardi (UPenn), Zoltan Haiman (Columbia)","submitted_at":"2008-06-20T21:00:17Z","abstract_excerpt":"We utilize the local velocity dispersion function (VDF) of spheroids, together with their inferred age--distributions, to predict the VDF at higher redshifts (0<z<6), under the assumption that (i) most of the stars in each nearby spheroid formed in a single episode, and (ii) the velocity dispersion sigma remained nearly constant afterward. We assume further that a supermassive black hole (BH) forms concurrently with the stars, and within ~1 Gyr of the formation of the potential well of the spheroid, and that the relation between the mass of the BH and host velocity dispersion maintains the for"},"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":"0806.3459","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-20T21:00:17Z","cross_cats_sorted":[],"title_canon_sha256":"2f5df61c91f041f5e51a824d8d08e327ecc2114521dace43fdf04c255259d5e9","abstract_canon_sha256":"d4e19dbbe4befe306269b6111f2946156045d8da1f864735ee8d4941ea0065eb"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:35:21.836673Z","signature_b64":"yNzPDCvtGGoXpNYwAua6CTFEgvKO7ixzafxKa7qCqCjoLX+DwuU6X74pDj/zorU6R04xCktZDWofazyF1xVODQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0fe62fa142bab1e28baf13386b5f0a088b080bcba029155c3f19960c61a55339","last_reissued_at":"2026-05-18T02:35:21.836115Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:35:21.836115Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Evolution of the M_BH-sigma relation Inferred from the Age Distribution of Local Early-Type Galaxies and AGN Evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Francesco Shankar (OSU), Mariangela Bernardi (UPenn), Zoltan Haiman (Columbia)","submitted_at":"2008-06-20T21:00:17Z","abstract_excerpt":"We utilize the local velocity dispersion function (VDF) of spheroids, together with their inferred age--distributions, to predict the VDF at higher redshifts (0<z<6), under the assumption that (i) most of the stars in each nearby spheroid formed in a single episode, and (ii) the velocity dispersion sigma remained nearly constant afterward. We assume further that a supermassive black hole (BH) forms concurrently with the stars, and within ~1 Gyr of the formation of the potential well of the spheroid, and that the relation between the mass of the BH and host velocity dispersion maintains the for"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0806.3459","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":"0806.3459","created_at":"2026-05-18T02:35:21.836198+00:00"},{"alias_kind":"arxiv_version","alias_value":"0806.3459v1","created_at":"2026-05-18T02:35:21.836198+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0806.3459","created_at":"2026-05-18T02:35:21.836198+00:00"},{"alias_kind":"pith_short_12","alias_value":"B7TC7IKCXKY6","created_at":"2026-05-18T12:25:56.245647+00:00"},{"alias_kind":"pith_short_16","alias_value":"B7TC7IKCXKY6FC5P","created_at":"2026-05-18T12:25:56.245647+00:00"},{"alias_kind":"pith_short_8","alias_value":"B7TC7IKC","created_at":"2026-05-18T12:25:56.245647+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/B7TC7IKCXKY6FC5PCM4GWXYKBC","json":"https://pith.science/pith/B7TC7IKCXKY6FC5PCM4GWXYKBC.json","graph_json":"https://pith.science/api/pith-number/B7TC7IKCXKY6FC5PCM4GWXYKBC/graph.json","events_json":"https://pith.science/api/pith-number/B7TC7IKCXKY6FC5PCM4GWXYKBC/events.json","paper":"https://pith.science/paper/B7TC7IKC"},"agent_actions":{"view_html":"https://pith.science/pith/B7TC7IKCXKY6FC5PCM4GWXYKBC","download_json":"https://pith.science/pith/B7TC7IKCXKY6FC5PCM4GWXYKBC.json","view_paper":"https://pith.science/paper/B7TC7IKC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0806.3459&json=true","fetch_graph":"https://pith.science/api/pith-number/B7TC7IKCXKY6FC5PCM4GWXYKBC/graph.json","fetch_events":"https://pith.science/api/pith-number/B7TC7IKCXKY6FC5PCM4GWXYKBC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/B7TC7IKCXKY6FC5PCM4GWXYKBC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/B7TC7IKCXKY6FC5PCM4GWXYKBC/action/storage_attestation","attest_author":"https://pith.science/pith/B7TC7IKCXKY6FC5PCM4GWXYKBC/action/author_attestation","sign_citation":"https://pith.science/pith/B7TC7IKCXKY6FC5PCM4GWXYKBC/action/citation_signature","submit_replication":"https://pith.science/pith/B7TC7IKCXKY6FC5PCM4GWXYKBC/action/replication_record"}},"created_at":"2026-05-18T02:35:21.836198+00:00","updated_at":"2026-05-18T02:35:21.836198+00:00"}