{"id":"W3137038733","doi":"10.3847/2041-8213/abe4de","title":"First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon","year":2021,"lang":"en","type":"article","venue":"The Astrophysical Journal Letters","topic":"Astrophysics and Cosmic Phenomena","field":"Physics and Astronomy","cited_by":649,"is_retracted":false,"has_abstract":true,"ca_institutions":"Canadian Institute for Theoretical Astrophysics; University of Toronto; Perimeter Institute; University of Waterloo; Canadian Institute for Advanced Research; McGill University","funders":"Los Alamos National Laboratory; Fermilab; Office of International Science and Engineering; National Key Research and Development Program of China; Japan Society for the Promotion of Science; National Nuclear Security Administration; Office of Science; Toray Science Foundation; East Asian Core Observatories Association; Institut Périmètre de physique théorique; Agencia Nacional de Investigación y Desarrollo; Istituto Nazionale di Fisica Nucleare; Max-Planck-Gesellschaft; Centre National de la Recherche Scientifique; National Natural Science Foundation of China; National Research Foundation of Korea; Ministerio de Ciencia, Innovación y Universidades; Nuclear Safety and Security Commission; Generalitat Valenciana; Natural Sciences and Engineering Research Council of Canada; China Scholarship Council; European Southern Observatory; Ministry of Education, Culture, Sports, Science and Technology; John Templeton Foundation; Ministerio de Economía y Competitividad; National Science Foundation; China Postdoctoral Science Foundation; Nederlandse Organisatie voor Wetenschappelijk Onderzoek; Instituto de Astrofísica de Andalucía; Chinese Academy of Sciences; Academia Sinica; Junta de Andalucía; Universiteit van Amsterdam; Vetenskapsrådet; International Max Planck Research School for Environmental, Cellular and Molecular Microbiology; Smithsonian Institution; U.S. Department of Energy; European Commission; Leverhulme Trust; National Radio Astronomy Observatory; Harvard University; Radboud Universiteit; National Research Foundation; University of Arizona; Universidad Nacional Autónoma de México; Korea Astronomy and Space Science Institute; Universiteit Leiden; Associated Universities; Space Telescope Science Institute; Compute Canada; National Astronomical Observatory of Japan; Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México; Ministerio de Ciencia e Innovación; Consejo Nacional de Ciencia y Tecnología; Consejo Superior de Investigaciones Científicas; University of Chicago; National Institutes of Natural Sciences; Government of Canada; National Aeronautics and Space Administration; Gordon and Betty Moore Foundation; Flatiron Health","keywords":"Event horizon; Event (particle physics); Horizon; Physics; Telescope; Astronomy; Geology; Astrophysics","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.000166204,0.0004078595,0.0003852344,0.00002494115,0.001282259,0.0006221134,0.000867656,0.00003986209,0.0002652926],"category_scores_gemma":[0.00001523862,0.0002412137,0.0004941332,0.0003169928,0.0002417315,0.0001666254,0.0002939395,0.001435282,0.00009730471],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00008395733,"about_ca_system_score_gemma":0.000176119,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.00008001619,"about_ca_topic_score_gemma":0.000003694356,"domain_scores_codex":[0.9974234,0.0002541188,0.000553436,0.0004160574,0.000640627,0.000712363],"domain_scores_gemma":[0.9983125,0.0002293074,0.0003431271,0.0007831624,0.0001183998,0.0002134876],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"bench_or_experimental","study_design_gemma":"not_applicable","study_design_scores_codex":[0.0008046054,0.00081329,0.0004238179,0.00002741488,0.0009962455,0.000219188,0.002175298,0.03571093,0.4456831,0.02082665,0.05923558,0.4330839],"study_design_scores_gemma":[0.02931759,0.02556001,0.104347,0.002174407,0.004349407,0.0008400536,0.01362742,0.02717654,0.1161483,0.1431351,0.5235335,0.009790616],"study_design_candidate":"not_applicable","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9357725,0.0001159216,0.0293296,0.033392,0.0007115392,0.000230097,0.000097839,0.0000217139,0.0003288064],"genre_scores_gemma":[0.9934227,0.000009830377,0.00100739,0.00133314,0.00394206,0.000014546,0.00002696202,0.00004790482,0.0001954522],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.4642979,"threshold_uncertainty_score":0.9862232,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.004592618931373581,"score_gpt":0.2036970200219965,"score_spread":0.1991044010906229,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). 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