Toward a new paradigm for Type II migration

Understand

Context.

• Giant planets open gaps in their protoplanetary and subsequently suffer so-called type II migration.
• Schematically, planets are thought to be tightly locked within their surrounding disks, and forced to follow the viscous advection of gas onto the central star.
• This fundamental principle however has recently been questioned, as migrating planets were shown to decouple from the gas' radial drift.