{"id":"W4414759493","doi":"10.1126/science.adu0401","title":"Observation of undepleted phosphine in the atmosphere of a low-temperature brown dwarf","year":2025,"lang":"en","type":"article","venue":"Science","topic":"Astro and Planetary Science","field":"Physics and Astronomy","cited_by":10,"is_retracted":false,"has_abstract":true,"ca_institutions":"Western University","funders":"Heising-Simons Foundation; UK Research and Innovation; Space Telescope Science Institute","keywords":"Atmosphere (unit); Brown dwarf; Planet; Jupiter (rocket family); Phosphine; Saturn; Abundance (ecology); Atmospheric chemistry","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":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.000386313,0.00005091781,0.00008219947,0.00001534299,0.00006574926,0.00001857035,0.0004742251,0.00001218363,0.00006349873],"category_scores_gemma":[0.00001492078,0.00003345716,0.00002118092,0.00145098,0.000265124,0.0001856007,0.00002999428,0.00007971192,0.000001820263],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.000005720404,"about_ca_system_score_gemma":0.0001916681,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0003483677,"about_ca_topic_score_gemma":0.00003031375,"domain_scores_codex":[0.9993671,0.00001711136,0.0001399401,0.0001391217,0.0002124304,0.0001243024],"domain_scores_gemma":[0.9996154,0.00005444442,0.00006298111,0.0001939475,0.00005872165,0.00001448553],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.00001171958,0.00007290005,0.8287944,0.00002024799,0.000003629972,3.772735e-7,0.0007942181,0.002408865,0.1428696,0.01945305,0.000223824,0.005347121],"study_design_scores_gemma":[0.0001455903,0.00002608958,0.9739428,0.00005978053,0.000002703839,1.046016e-7,0.0006532099,0.002614401,0.02112007,0.001162054,0.0002296999,0.00004356275],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9968029,0.00004867446,0.0002724535,0.0002410774,0.00007864214,0.00009165181,0.00001278579,0.000002543284,0.002449287],"genre_scores_gemma":[0.999259,8.84986e-7,0.0004566311,0.00007148552,0.00001048175,0.000001761954,0.000006548579,7.362274e-7,0.0001924776],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.1451483,"threshold_uncertainty_score":0.1364343,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.007406706664034551,"score_gpt":0.2241811987163818,"score_spread":0.2167744920523472,"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."}}