Magnetorotational instability (MRI) is a type of instability that occurs in differentially rotating astrophysical systems where magnetic fields are present. This phenomenon can lead to the turbulent transport of angular momentum, which is crucial in the dynamics of accretion disks around celestial objects such as black holes and young stars. MRI plays a vital role in the efficiency of accretion processes, affecting how mass and energy are transported within these disks.
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