{"id":"W2271428283","doi":"10.3847/0004-6256/151/3/55","title":"THE START OF THE SAGITTARIUS SPIRAL ARM (SAGITTARIUS ORIGIN) AND THE START OF THE NORMA SPIRAL ARM (NORMA ORIGIN): MODEL-COMPUTED AND OBSERVED ARM TANGENTS AT GALACTIC LONGITUDES −20° < l < +23°","year":2016,"lang":"en","type":"article","venue":"The Astronomical Journal","topic":"Astrophysics and Star Formation Studies","field":"Physics and Astronomy","cited_by":39,"is_retracted":false,"has_abstract":true,"ca_institutions":"National Research Council Canada; Herzberg Institute of Astrophysics","funders":"","keywords":"Sagittarius; Spiral (railway); Spiral galaxy; Tangent; Sagittarius A*; Physics; Astrophysics; Galactic Center; Geometry; Engineering; Stars; Mathematics; Milky Way","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":[0.0002840577,0.0002908388,0.000226669,0.0005399382,0.000205889,0.0008888935,0.0004270886,0.000364831,0.001569657],"category_scores_gemma":[0.00101604,0.0002142298,0.0005152959,0.0005359991,0.0001780683,0.0004090271,0.0002988911,0.0002686193,0.0004391606],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.000928499,"about_ca_system_score_gemma":0.0004553461,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.04010269,"about_ca_topic_score_gemma":0.02806303,"domain_scores_codex":[0.9999082,0.0000184774,0.000004330427,0.00003519211,0.00001307459,0.00002065076],"domain_scores_gemma":[0.9996529,0.000070448,0.00006297441,0.00005191038,0.00009967254,0.00006228806],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"simulation_or_modeling","study_design_gemma":"simulation_or_modeling","study_design_scores_codex":[0.0002711951,0.00005422528,0.4533239,0.00004657655,0.0001296665,0.0001555531,0.000140216,0.5289587,0.005838172,0.0008440115,0.0007025613,0.009535158],"study_design_scores_gemma":[0.00005247095,0.00009335503,0.3297768,0.00002784944,0.00005646274,0.00008503022,0.0002227659,0.663859,0.002721301,0.0006932368,0.002358434,0.00005323127],"study_design_candidate":"simulation_or_modeling","study_design_consensus":"simulation_or_modeling","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9953101,0.00007512914,0.002140822,0.00002890457,0.000005327101,0.000005861119,0.0006598635,0.0001779981,0.001596006],"genre_scores_gemma":[0.9981549,0.0000245986,0.0007214574,0.000003988889,0.00000155659,0.000003388307,0.0008156131,0.00003428917,0.0002401307],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.04010269,"threshold_uncertainty_score":0.07973856,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.02430445769993417,"score_gpt":0.2336023002633922,"score_spread":0.209297842563458,"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."}}