{"id":"9085bf6b-a186-472c-82bb-8843df796f63","arxiv_id":"2411.07988","paper_version":1,"verdict":"UNVERDICTED","confidence":"HIGH","novelty_score":1.0,"correctness_risk":"low","formal_verification":"none","parameter_count":0,"one_line_summary":"A review chapter and lecture notes summarizing the observational and simulated view of the multiphase circumgalactic medium and the cosmic baryon cycle, with IllustrisTNG-based exercises.","lead":"These are the Saas-Fee lecture notes by Peroux and Nelson on the circumgalactic medium, the gas that surrounds galaxies and fuels or quenches their star formation. The chapter reviews observations and simulations of the baryon cycle and includes four hands-on Python exercises using the IllustrisTNG simulation.","discovery_kind":"review","skeptic_critique":null,"referee_report":null,"author_rebuttal":null,"desk_editor":null,"rs_alignment":null,"lean_confirmation":null,"pith_extraction":null,"created_at":"2026-08-12T22:02:02.048170+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":null,"supporting_citations":[],"review_version":1}