Gravito-turbulence in local disk simulations with an adaptive moving mesh

Understand

Self-gravity plays an important role in the evolution of rotationally supported systems such as protoplanetary disks, accretion disks around black holes, or galactic disks, as it can both feed turbulence or lead to gravitational fragmentation.

• While such systems can be studied in the shearing box approximation with high local resolution, the large density contrasts that are possible in the case of fragmentation still limit the utility of Eulerian codes with constant spatial resolution.
• In this paper, we present a novel self-gravity solver for the shearing box based on the TreePM method of the moving-mesh code AREPO.
• The spatial gravitational resolution is adaptive which is important to make full use of the quasi-Lagrangian hydrodynamical resolution of the code.