Buoyancy response of a disc to an embedded planet

Buoyancy response of a disc to an embedded planet: a cross-code comparison at high resolution

Ziampras, Alexandros (Queen Mary University of London)
Paardekooper, S. (TU Delft Astrodynamics & Space Missions; Queen Mary University of London)
Nelson, Richard P. (Queen Mary University of London)

2023

In radiatively inefficient, laminar protoplanetary discs, embedded planets can excite a buoyancy response as gas gets deflected vertically near the planet. This results in vertical oscillations that drive a vortensity growth in the planet's corotating region, speeding up inward migration in the type-I regime. We present a comparison between pluto/idefix and fargo3D using 3D, inviscid, adiabatic numerical simulations of planet-disc interaction that feature the buoyancy response of the disc, and show that pluto/idefix struggle to resolve higher-order modes of the buoyancy-related oscillations, weakening vortensity growth, and the associated torque. We interpret this as a drawback of total-energy-conserving finite-volume schemes. Our results indicate that a very high resolution or high-order scheme is required in shock-capturing codes in order to adequately capture this effect.

accretion discs
hydrodynamics
methods: numerical
planet-disc interactions

http://resolver.tudelft.nl/uuid:d748936e-2d28-4855-8092-2a509ab26d1b

https://doi.org/10.1093/mnras/stad2692

0035-8711

Monthly Notices of the Royal Astronomical Society, 525 (4), 5893-5904

Institutional Repository

journal article

© 2023 Alexandros Ziampras, S. Paardekooper, Richard P. Nelson