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This lecture explores the fascinating world of magnetars - neutron stars with extraordinarily powerful magnetic fields reaching up to 100 gigatesla. Discover how these young, active celestial objects generate energetic phenomena including X-ray bursts, soft gamma-ray giant flares, and potentially fast radio bursts. Learn about the proposed mechanism where crustal activities like starquakes trigger plasma waves, particularly Alfvén waves, that propagate through the magnetosphere. Examine the complex nonlinear processes these waves undergo and how they may power the bright, multiwavelength signals astronomers observe. Join Yajie Yuan for a systematic investigation of plasma-wave dynamics that provides crucial insights into the extreme electrodynamics governing magnetars and their remarkable emissions.
