Self-organisation in protoplanetary disks: global, non-stratified Hall-MHD simulations

Understand

Recent observations revealed organised structures in protoplanetary disks, such as axisymmetric rings or horseshoe concen- trations evocative of large-scale vortices.

• These structures are often interpreted as the result of planet-disc interactions.
• However, these disks are also known to be unstable to the magneto-rotational instability (MRI) which is believed to be one of the dominant angular momentum transport mechanism in these objects.
• It is therefore natural to ask if the MRI itself could produce these structures without invoking planets.