{"id":"W4416102090","doi":"10.3847/2041-8213/ae13a9","title":"A Deep Dive down the Broad-line Region: Permitted O <scp>I</scp> , Ca <scp>II,</scp> and Fe <scp>II</scp> Emission in an Active Galactic Nucleus Little Red Dot at <i>z</i> = 5.3","year":2025,"lang":"en","type":"article","venue":"The Astrophysical Journal Letters","topic":"Astrophysical Phenomena and Observations","field":"Physics and Astronomy","cited_by":6,"is_retracted":false,"has_abstract":true,"ca_institutions":"Saint Mary's University; York University; Herzberg Institute of Astrophysics","funders":"European Space Agency; Space Telescope Science Institute","keywords":"Photoionization; Active galactic nucleus; Balmer series; Ionization; Extinction (optical mineralogy); Nucleus; Protein filament; Supermassive black hole; Attenuation","routes":{"ca_aff":true,"ca_fund":false,"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":[0.00004569204,0.0001070601,0.0001003253,0.0004314112,0.0003720802,0.0002982455,0.0001784072,0.0001572769,0.00112296],"category_scores_gemma":[0.00006789503,0.00007383561,0.00008881206,0.0002074216,0.0001512939,0.0001189489,0.0002909575,0.000190637,0.0001913226],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0002426658,"about_ca_system_score_gemma":0.0000891967,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.007515616,"about_ca_topic_score_gemma":0.01560949,"domain_scores_codex":[0.9999653,0.000001389953,9.25029e-7,0.00001052852,0.000009994335,0.00001183586],"domain_scores_gemma":[0.9999008,0.000006183302,0.00002144714,0.000005260613,0.00001832282,0.00004790905],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0002870901,0.0001104958,0.6995695,0.00001834811,0.00003140907,0.0008119818,0.0003484648,0.0002916326,0.287251,0.0001549121,0.0004828304,0.01064241],"study_design_scores_gemma":[0.000002883549,0.00004229214,0.994031,0.000001755291,0.000005897371,0.0002087891,0.0001354937,0.0004958156,0.004583054,0.0000329973,0.0004577675,0.000002329426],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9991178,0.00002239747,0.0001624542,0.00001590227,0.000001121348,0.000002054305,0.00008332025,0.00001223748,0.0005826271],"genre_scores_gemma":[0.9992543,0.000009122287,0.0002494827,0.00001308257,0.000001606333,0.000001129581,0.0001542088,0.000002970664,0.0003141513],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.007515616,"threshold_uncertainty_score":0.01494372,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.01086574306967288,"score_gpt":0.2306184439617661,"score_spread":0.2197527008920932,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}