{"paper":{"title":"Observational Signatures of Rotating Ay\\'{o}n-Beato-Garc\\'{i}a Black Holes: Shadows, Accretion Disks and Images","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"Rotating Ayón-Beato-García black holes have their charge parameter constrained to 0.132811M < ζ < 0.213607M by matching shadow sizes to EHT data for M87* and Sgr A*.","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Meng Chen, Rong-Jia Yang, Zhenglong Ban","submitted_at":"2026-03-19T14:28:37Z","abstract_excerpt":"We investigate the shadows, accretion disks, and observational images of rotating Ay\\'{o}n-Beato-Garc\\'{i}a black holes characterized by mass $ M $ , spin $ a $ , and electric charge $ \\zeta $ . Our analysis reveals that the shadow size decreases with increasing $ \\zeta $, and in near-extremal configurations (e.g., $ a = 0.95 $), the shadow adopts a distinctive ``D''-shaped morphology. For the accretion disk, we extend its inner edge to the event horizon and account for distinct particle dynamics inside and outside the innermost stable circular orbit (ISCO). We find that the correlation betwee"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"By comparing theoretical shadow diameters with the Event Horizon Telescope observations of M87* and Sgr A*—using inclination angles of 17°, 50°, and 90°—we constrain the viable parameter space, yielding the joint bound 0.132811 M < ζ < 0.213607 M consistent with both sources.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The analysis assumes specific observer inclination angles and a particular accretion-disk model that extends the inner edge to the event horizon while treating particle dynamics differently inside and outside the ISCO.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Rotating Ayón-Beato-García black holes produce smaller and sometimes D-shaped shadows whose size constrains the charge parameter ζ to the range 0.132811M–0.213607M when matched to EHT observations of M87* and Sgr A*.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Rotating Ayón-Beato-García black holes have their charge parameter constrained to 0.132811M < ζ < 0.213607M by matching shadow sizes to EHT data for M87* and Sgr A*.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"a9aadfef018a606f31b2331ab5538747af538cb2828e5d5fbbf3be00fba7120d"},"source":{"id":"2603.18963","kind":"arxiv","version":2},"verdict":{"id":"72cb67eb-7dd1-4373-bfb7-22d8a64d4aae","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-15T08:28:10.905868Z","strongest_claim":"By comparing theoretical shadow diameters with the Event Horizon Telescope observations of M87* and Sgr A*—using inclination angles of 17°, 50°, and 90°—we constrain the viable parameter space, yielding the joint bound 0.132811 M < ζ < 0.213607 M consistent with both sources.","one_line_summary":"Rotating Ayón-Beato-García black holes produce smaller and sometimes D-shaped shadows whose size constrains the charge parameter ζ to the range 0.132811M–0.213607M when matched to EHT observations of M87* and Sgr A*.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The analysis assumes specific observer inclination angles and a particular accretion-disk model that extends the inner edge to the event horizon while treating particle dynamics differently inside and outside the ISCO.","pith_extraction_headline":"Rotating Ayón-Beato-García black holes have their charge parameter constrained to 0.132811M < ζ < 0.213607M by matching shadow sizes to EHT data for M87* and Sgr A*."},"references":{"count":76,"sample":[{"doi":"","year":2016,"title":"Observation of Gravitational Waves from a Binary Black Hole Merger","work_id":"ab878228-151c-4a29-8026-a4308b076d30","ref_index":1,"cited_arxiv_id":"1602.03837","is_internal_anchor":true},{"doi":"","year":2019,"title":"First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole","work_id":"090661bf-d0e6-4cf3-a7b6-39cd0420cf87","ref_index":2,"cited_arxiv_id":"1906.11238","is_internal_anchor":true},{"doi":"","year":2019,"title":"First M87 Event Horizon Telescope Results. II. Array and Instrumentation","work_id":"dfafa2c3-3203-4154-9dbb-6b5f51125ba4","ref_index":3,"cited_arxiv_id":"1906.11239","is_internal_anchor":true},{"doi":"","year":2019,"title":"First M87 Event Horizon Telescope Results. III. Data Processing and Calibration","work_id":"3ac325ef-922d-445e-8ca6-cf5055728fc6","ref_index":4,"cited_arxiv_id":"1906.11240","is_internal_anchor":true},{"doi":"","year":2019,"title":"Akiyama et al., First M87 Event Horizon Telescope Results","work_id":"f51526a9-7969-4839-a88a-560c389582f8","ref_index":5,"cited_arxiv_id":"1906.11241","is_internal_anchor":true}],"resolved_work":76,"snapshot_sha256":"566c2312dbf7c5dc2db05db9d93ceac7e11e428b3300aaee2062f0f1f07bcb00","internal_anchors":33},"formal_canon":{"evidence_count":1,"snapshot_sha256":"6372c6ca17708e4be0732adfa4961819e268ed47d38513834eb0eb91f1b551ba"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}