Planet–disc interaction on a freely moving mesh

• DOI: 10.1093/mnras/stu1918
• Publication Date: 2014-10-31T04:26:52Z
• Authors: D. J. Muñoz; K. Kratter; V. Springel; L. Hernquist
• Keywords: Smoothed Particle Hydrodynamics; Adaptive Mesh Refinement; Numerical diffusion

General-purpose, moving-mesh schemes for hydrodynamics have opened the possibility of combining accuracy grid-based numerical methods with flexibility and automatic resolution adaptivity particle-based methods. Due to their supersonic nature, Keplerian accretion discs are in principle a very attractive system applying such freely moving mesh techniques. However, high degree symmetry simple disc models can be difficult capture accurately by these methods, due generation geometric grid noise associated diffusion, which is absent polar grids. To explore other issues, this work we study idealized problem two-dimensional planet-disc interaction code AREPO. We hydrodynamic evolution planets through series experiments that vary planet mass, viscosity resolution, compare resulting surface density, vortensity field tidal torque results from literature. find performance accordance published results, showing good consistency codes written coordinates. also conclude distortions do not introduce excessive diffusion. Finally, show how approach naturally increase regions densityaround planetary wakes, while retaining background flow at low resolution. This provides an alternative task implementing adaptive refinement conventional polar-coordinate codes.