| Abstract |
During the formation of gas giants, disks appear around them. They are called circumplanetary disks. The most promising mechanism of accretion is the turbulence driven by magnetorotational instability (MRI). MRI occurs when the ionization degree is high enough for magnetic fields to couple to gas. We calculate the ionization degrees to investigate if MRI really causes accretion of circumplanetary disks. Our result suggests that ionization degrees in circumplanetary disks are too low for MRI to be active. |
