Scale-dependent anistropy in gyrokinetic turbulence

Eddies in Alfvenic turbulence get progressively more anisotropic with respect to the \textit{local} magnetic field. This has been recently observed in a gyrokinetic simulation [Howes et. al., PRL, 107:035004:2011, TenBarge \& Howes, eprint arXiv:1201.0056]. However, the nature of cascade for slow modes in an Alfvenic turbulent bath is still unclear. We present theory and numerical results from AstroGK exploring the nature of this cascade.