IEVref: 121-14-07 ID: Language: en Status: Standard Term: magnetosonic wave Synonym1: magnetoacoustic wave Synonym2: Synonym3: Symbol: Definition: longitudinal magnetohydrodynamic wave Note 1 to entry: The movement of the particles of the fluid is parallel to the direction of propagation of the magnetosonic wave; its wave vector k is orthogonal to the magnetic flux density. The phase velocity of magnetosonic waves is ${c}_{\phi }={c}_{0}^{}\sqrt{\frac{\left({v}_{s}^{2}+{v}_{A}^{2}\right)}{\left({c}_{0}^{2}+{v}_{A}^{2}\right)}}$ where ${v}_{s}$ is the sound wave velocity (in a gas, ${v}_{s}^{}=\sqrt{\kappa p/\rho }$) ${v}_{A}$ is the Alfvén wave velocity ${c}_{0}$ is the speed of light in vacuum Note 2 to entry: For low magnetic fields, the phase velocity of the magnetosonic wave approaches sound wave velocity. Publication date: 2021-03 Source: Replaces: Internal notes: CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: