Non-ideal MHD and the protoplanetary disk size

Yueh-Ning Lee^1*, Barshan Ray², Pierre Marchand³, Patrick Hennebelle⁴

¹Department of Earth Sciences, National Taiwan Normal University, Taipei, Taiwan
²IISER Kolkata, India
³IRAP, Toulouse, France
⁴DAp, CEA, Saclay, France

* Presenter:Yueh-Ning Lee, email:ynlee@ntnu.edu.tw

Many mechanisms have been proposed to alleviate the magnetic catastrophe, that prevents the Keplerian disk from forming inside a collapsing magnetized core. Such propositions include inclined field and non-ideal magnetohydrodynamics effects, and have been supported with numerical experiments. Models have been proposed for typical disk sizes when a field threads the rotating disk, parallel to the rotation axis, while observations at the core scales do not seem to show any correlation between the directions of angular momentum and the magnetic field. In the present study, we present a new model that considers vertical and horizontal fields and discuss their effects on the protoplanetary disk size.

Keywords: protoplanetary disk, magnetic field, non-ideal MHD, gravity