{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:UCW64CVKICEEFONDUQZQFPPSZV","short_pith_number":"pith:UCW64CVK","schema_version":"1.0","canonical_sha256":"a0adee0aaa408842b9a3a43302bdf2cd7fdb189a2943b49385ac0e714f997e01","source":{"kind":"arxiv","id":"0909.2041","version":1},"attestation_state":"computed","paper":{"title":"Exact relativistic viscous fluid solutions in near horizon extremal Kerr background","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph.SR","authors_text":"Ana-Maria Piso, Daniel Grumiller","submitted_at":"2009-09-10T20:05:45Z","abstract_excerpt":"Realistic accretion disk models require a number of ingredients, including viscous fluids, electromagnetic fields and general relativistic corrections. Close to the innermost stable circular orbit (ISCO) the latter can be appreciable and (quasi-)Newtonian approximations become unreliable. This is particularly true for nearly extremal black holes like GRS 1915+105, where the ISCO almost coincides with the black hole horizon. To describe the physics close to the ISCO adequately in a simplified model we approximate the nearly extremal Kerr geometry by the near-horizon extremal Kerr geometry and c"},"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":"0909.2041","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-09-10T20:05:45Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"ce5948f1899fa80484e54d7b3941d1308a9ecd2a719325fb21061e3e583479ed","abstract_canon_sha256":"c49ddc108541128597fa13aff60fcb993efca78cac70b51f84ab833d859ff846"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:49:22.906340Z","signature_b64":"hd8+BE9EOPe7ixzkWgHKCD0mH7nsQGQDFRI1GW36sK/cj/ceZXUp8CMJoFjmjseM8HTlf6ghuSPKEDcMIoBcAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a0adee0aaa408842b9a3a43302bdf2cd7fdb189a2943b49385ac0e714f997e01","last_reissued_at":"2026-07-04T15:49:22.905858Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:49:22.905858Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Exact relativistic viscous fluid solutions in near horizon extremal Kerr background","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph.SR","authors_text":"Ana-Maria Piso, Daniel Grumiller","submitted_at":"2009-09-10T20:05:45Z","abstract_excerpt":"Realistic accretion disk models require a number of ingredients, including viscous fluids, electromagnetic fields and general relativistic corrections. Close to the innermost stable circular orbit (ISCO) the latter can be appreciable and (quasi-)Newtonian approximations become unreliable. This is particularly true for nearly extremal black holes like GRS 1915+105, where the ISCO almost coincides with the black hole horizon. To describe the physics close to the ISCO adequately in a simplified model we approximate the nearly extremal Kerr geometry by the near-horizon extremal Kerr geometry and c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.2041","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0909.2041/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":"0909.2041","created_at":"2026-07-04T15:49:22.905926+00:00"},{"alias_kind":"arxiv_version","alias_value":"0909.2041v1","created_at":"2026-07-04T15:49:22.905926+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.2041","created_at":"2026-07-04T15:49:22.905926+00:00"},{"alias_kind":"pith_short_12","alias_value":"UCW64CVKICEE","created_at":"2026-07-04T15:49:22.905926+00:00"},{"alias_kind":"pith_short_16","alias_value":"UCW64CVKICEEFOND","created_at":"2026-07-04T15:49:22.905926+00:00"},{"alias_kind":"pith_short_8","alias_value":"UCW64CVK","created_at":"2026-07-04T15:49:22.905926+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/UCW64CVKICEEFONDUQZQFPPSZV","json":"https://pith.science/pith/UCW64CVKICEEFONDUQZQFPPSZV.json","graph_json":"https://pith.science/api/pith-number/UCW64CVKICEEFONDUQZQFPPSZV/graph.json","events_json":"https://pith.science/api/pith-number/UCW64CVKICEEFONDUQZQFPPSZV/events.json","paper":"https://pith.science/paper/UCW64CVK"},"agent_actions":{"view_html":"https://pith.science/pith/UCW64CVKICEEFONDUQZQFPPSZV","download_json":"https://pith.science/pith/UCW64CVKICEEFONDUQZQFPPSZV.json","view_paper":"https://pith.science/paper/UCW64CVK","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0909.2041&json=true","fetch_graph":"https://pith.science/api/pith-number/UCW64CVKICEEFONDUQZQFPPSZV/graph.json","fetch_events":"https://pith.science/api/pith-number/UCW64CVKICEEFONDUQZQFPPSZV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/UCW64CVKICEEFONDUQZQFPPSZV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/UCW64CVKICEEFONDUQZQFPPSZV/action/storage_attestation","attest_author":"https://pith.science/pith/UCW64CVKICEEFONDUQZQFPPSZV/action/author_attestation","sign_citation":"https://pith.science/pith/UCW64CVKICEEFONDUQZQFPPSZV/action/citation_signature","submit_replication":"https://pith.science/pith/UCW64CVKICEEFONDUQZQFPPSZV/action/replication_record"}},"created_at":"2026-07-04T15:49:22.905926+00:00","updated_at":"2026-07-04T15:49:22.905926+00:00"}