{"paper":{"title":"The extremal Reissner-Nordstr\\\"om throat from non extremal near horizon expansions","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"Anirudhda Shinde, Mangesh Mandlik","submitted_at":"2026-07-26T17:13:31Z","abstract_excerpt":"The near horizon region of a non extremal black hole has a universal Rindler form, but the strict horizon limit is not an ordinary Lorentzian geometry. In the String Carroll expansion of this non extremal near horizon metric,the transverse angular directions form a base and the time-radial Rindler directions appear as a distinguished two-dimensional longitudinal sector fibered over this base. We study how this String Carroll expansion behaves for the Reissner-Nordstr\\\"om (RN) black hole as the extremal limit is approached, where the expected near horizon geometry is the Lorentzian $AdS_2 \\time"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.23760","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/2607.23760/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"}