Plasma Heating and Acceleration by Strong Magnetosonic Waves Propagating Obliquely to a Magnetostatic Field

The behavior of strong magnetosonic waves with ω>ωci (ωci=qᵢBmᵢc) is investigated in oblique propagation with particle simulation. Strong ion and electron heatings versus the angle [θ=(→k,→B₀)] are found for θ<90^∘{}. Ion heating peaks at a particular angle but disappears below a critical angle θ_tᵢ; electron heating sets in below a second critical angle θ_tₑ. The phenomena exhibit unexpected structure with θ.