{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:3UAYRQEPUCNFYFGJL4BBZI7NKS","short_pith_number":"pith:3UAYRQEP","schema_version":"1.0","canonical_sha256":"dd0188c08fa09a5c14c95f021ca3ed5495504f37e2589c5b498ee6e5eee814a8","source":{"kind":"arxiv","id":"1202.0719","version":1},"attestation_state":"computed","paper":{"title":"Making sense of the bizarre behaviour of horizons in the McVittie spacetime","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Andres F. Zambrano Moreno, Roshina Nandra, Valerio Faraoni","submitted_at":"2012-02-03T14:41:52Z","abstract_excerpt":"The bizarre behaviour of the apparent (black hole and cosmological) horizons of the McVittie spacetime is discussed using, as an analogy, the Schwarzschild-de Sitter-Kottler spacetime (which is a special case of McVittie anyway). For a dust-dominated \"background\" universe, a black hole cannot exist at early times because its (apparent) horizon would be larger than the cosmological(apparent) horizon. A phantom-dominated \"background\" universe causes this situation, and the horizon behaviour, to be time-reversed."},"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":"1202.0719","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-02-03T14:41:52Z","cross_cats_sorted":[],"title_canon_sha256":"f486559e9e2198d3ef517f2bf880b27ea95081778f0a3c719565e6b7b83d6cc0","abstract_canon_sha256":"4e776918371933a2b52c47f3b13e6f1b06f390066adf4ac7053defab27c59de8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:22:52.639814Z","signature_b64":"cMR1jMcK2moNZWgF5xOc0T0XYTQ13aoUjdgwKFkvZUqe21pXggROQrmf8ORdST8JvX8b7i6mBwSFIrkr72uRBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dd0188c08fa09a5c14c95f021ca3ed5495504f37e2589c5b498ee6e5eee814a8","last_reissued_at":"2026-05-18T03:22:52.639091Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:22:52.639091Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Making sense of the bizarre behaviour of horizons in the McVittie spacetime","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Andres F. Zambrano Moreno, Roshina Nandra, Valerio Faraoni","submitted_at":"2012-02-03T14:41:52Z","abstract_excerpt":"The bizarre behaviour of the apparent (black hole and cosmological) horizons of the McVittie spacetime is discussed using, as an analogy, the Schwarzschild-de Sitter-Kottler spacetime (which is a special case of McVittie anyway). For a dust-dominated \"background\" universe, a black hole cannot exist at early times because its (apparent) horizon would be larger than the cosmological(apparent) horizon. A phantom-dominated \"background\" universe causes this situation, and the horizon behaviour, to be time-reversed."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.0719","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":"1202.0719","created_at":"2026-05-18T03:22:52.639200+00:00"},{"alias_kind":"arxiv_version","alias_value":"1202.0719v1","created_at":"2026-05-18T03:22:52.639200+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.0719","created_at":"2026-05-18T03:22:52.639200+00:00"},{"alias_kind":"pith_short_12","alias_value":"3UAYRQEPUCNF","created_at":"2026-05-18T12:26:53.410803+00:00"},{"alias_kind":"pith_short_16","alias_value":"3UAYRQEPUCNFYFGJ","created_at":"2026-05-18T12:26:53.410803+00:00"},{"alias_kind":"pith_short_8","alias_value":"3UAYRQEP","created_at":"2026-05-18T12:26:53.410803+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":2,"sample":[{"citing_arxiv_id":"2603.24609","citing_title":"Cosmological coupled black holes immersed in dark sector","ref_index":51,"is_internal_anchor":true},{"citing_arxiv_id":"2603.24609","citing_title":"Cosmological coupled black holes immersed in dark sector","ref_index":51,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/3UAYRQEPUCNFYFGJL4BBZI7NKS","json":"https://pith.science/pith/3UAYRQEPUCNFYFGJL4BBZI7NKS.json","graph_json":"https://pith.science/api/pith-number/3UAYRQEPUCNFYFGJL4BBZI7NKS/graph.json","events_json":"https://pith.science/api/pith-number/3UAYRQEPUCNFYFGJL4BBZI7NKS/events.json","paper":"https://pith.science/paper/3UAYRQEP"},"agent_actions":{"view_html":"https://pith.science/pith/3UAYRQEPUCNFYFGJL4BBZI7NKS","download_json":"https://pith.science/pith/3UAYRQEPUCNFYFGJL4BBZI7NKS.json","view_paper":"https://pith.science/paper/3UAYRQEP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1202.0719&json=true","fetch_graph":"https://pith.science/api/pith-number/3UAYRQEPUCNFYFGJL4BBZI7NKS/graph.json","fetch_events":"https://pith.science/api/pith-number/3UAYRQEPUCNFYFGJL4BBZI7NKS/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3UAYRQEPUCNFYFGJL4BBZI7NKS/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3UAYRQEPUCNFYFGJL4BBZI7NKS/action/storage_attestation","attest_author":"https://pith.science/pith/3UAYRQEPUCNFYFGJL4BBZI7NKS/action/author_attestation","sign_citation":"https://pith.science/pith/3UAYRQEPUCNFYFGJL4BBZI7NKS/action/citation_signature","submit_replication":"https://pith.science/pith/3UAYRQEPUCNFYFGJL4BBZI7NKS/action/replication_record"}},"created_at":"2026-05-18T03:22:52.639200+00:00","updated_at":"2026-05-18T03:22:52.639200+00:00"}