Oral Presentation

Protoplanetary disk properties and the nonideal MHD

Author(s): Yueh-Ning Lee (NTNU)

Presenter: Yueh-Ning Lee (National Taiwan Normal University)

Protoplanetary disk formation is a natural outcome of prestellar core collapse. During the embedded class 0/1 phase, the close interaction with the infalling envelope should not be neglected when considering the dynamics and evolution of the disk. While evolved disks show larger sizes and a wide diversity of morphologies, recent observations suggested that young disks are mostly small (<50 au). I will present a self-regulated disk formation model (2021ApJ...922...36L), where the magnetic braking is moderated by the nonideal magnetohydrodynamic effects. The resulting disk radius is slowly varying for a wide range of physical parameters, which explains for the observed small disk size. I will discuss how, in synergy with observations, how this model might help to shed light on some of the MHD properties of the star-forming ISM.