Gaseous Dynamical Friction: A Challenge to Modern Hydrodynamical Schemes.

The process of momentum and energy transfer from a massive body moving through a background medium, known as dynamical friction (DF), is key to our understanding of many astrophysical systems. We present a series of high-resolution simulations of gaseous DF using Lagrangian hydrodynamics solvers, in the state-of-the-art multi-physics code, GIZMO. The numerical setup is chosen to allow direct comparison to analytic predictions for DF in the range of Mach 0.2

Keywords:

• Astrophysics
• Drag
• Supersonic speed
• Physics
• Dark matter
• Dynamical friction
• Wake
• Mechanics
• Perturbation (astronomy)
• Time evolution
• Mach number

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