{"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":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0008129424,0.0003704002,0.0004427626,0.0007673179,0.0005459418,0.0009142879,0.0004262038,0.0005280335,0.002667863],"category_scores_gemma":[0.0007155481,0.0002019179,0.0008174691,0.0005084148,0.0002875178,0.0003383489,0.0005750481,0.0003896117,0.001211432],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0008955392,"about_ca_system_score_gemma":0.0002757606,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.006999277,"about_ca_topic_score_gemma":0.009184998,"domain_scores_codex":[0.9996785,0.00004235165,0.00001251526,0.00005504718,0.0001334347,0.00007818575],"domain_scores_gemma":[0.9993099,0.0001049559,0.0001261118,0.0001682606,0.0001709745,0.0001197935],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.00202556,0.0006803044,0.7118598,0.0005222037,0.001110872,0.002937508,0.001225697,0.03842505,0.07156916,0.01194774,0.05628854,0.1014075],"study_design_scores_gemma":[0.0001370575,0.0002021361,0.923861,0.00005530215,0.0002291935,0.0005376858,0.0002198058,0.02828164,0.01501238,0.002670466,0.02874614,0.00004728331],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9253504,0.0009415413,0.01229942,0.0009400784,0.0001484322,0.0001221344,0.02040137,0.001507786,0.03828885],"genre_scores_gemma":[0.9835712,0.000115298,0.004132987,0.0001412401,0.00005990722,0.00002419081,0.00924899,0.0001228554,0.002583415],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.006999277,"threshold_uncertainty_score":0.01391709,"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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