Protoplanetary Disk Resonances and Type I Migration

TL;DR

This paper demonstrates that wave reflections at the inner edge of protoplanetary disks can alter Type I planetary migration, potentially trapping small planets near the star, which helps explain observed planetary distributions.

Contribution

It introduces the impact of disk edge wave reflections on Type I migration, revealing a mechanism for planet trapping near the inner disk edge.

Findings

Wave reflections significantly modify Type I migration.

Planets can be trapped near the inner disk edge.

Results align with Kepler observations.

Abstract

Waves reflected by the inner edge of a protoplanetary disk are shown to significantly modify Type I migration, even allowing the trapping of planets near the inner disk edge for small planets in a range of disk parameters. This may inform the distribution planets close to their central stars, as observed by the Kepler mission.