Magnetohydrodynamic Magnetohydrodynamics 4 Magnetohydrodynamics (MHD) 4 Accretion discs 2 Black holes 2 Gravitation 2 Stars 2 Accretion 1 Accretion disks 1 Accretion, accretion disks 1 Accretion: accretion disks 1 Acoustic wave propagation 1 Acoustics 1 Black Hole physics 1 Black hole physics 1 Decomposition methods 1 Distribution functions 1 Flux transport 1 Galaxies 1 Galaxies active 1 Galaxies: active 1 Globular cluster: individual: m87 1 Globular clusters: individual 1 Globular clusters: individual: M87 1 ISM jets and outflows 1 ISM: jets and outflows 1 Interactive devices 1 Jet instability 1 Location 1 Lower frequencies 1