Mapping the Planetary Wake in HD 163296 with Kinematics

TL;DR

This paper presents the first direct observation of a planetary wake in the protoplanetary disk of HD 163296, confirming theoretical models of planet-disk interactions through kinematic mapping.

Contribution

It provides the first direct detection of planet wakes caused by Lindblad resonances in a protoplanetary disk, using kinematic perturbations in CO emission.

Findings

Detected correlated velocity perturbations indicating a planetary wake.

Confirmed that the wake induces radial motions consistent with models.

Mapped the wake to constrain the disk's aspect ratio.

Abstract

We map the planetary wake associated with the embedded protoplanet creating the CO kink in the disk of HD~163296. We show that the wake can be traced by a series of correlated perturbations in the peak velocity map. The sign change of the perturbations across the disk major axis confirm that the wake induces predominantly radial motion, as predicted by models of planet-disk interaction. These results provide the first direct confirmation of planet wakes generated by Lindblad resonances. Mapping the wake provides a constraint on the disk aspect ratio, which is required to measure the mass of the planet.