Radial Evolution of Turbulence Spectra on the Jovian Magnetosheath Flanks: Juno Observations

The Jovian magnetosheath provides a unique environment for examining the radial evolution of magnetosheath turbulence due to its large spatial extent. Utilizing magnetic field measurements from the Juno spacecraft, this study examines the radial evolution of magnetic field turbulence on the flanks of the Jovian magnetosheath. We find that turbulence on the dawn flank evolves significantly after crossing the bow shock. In contrast, the dusk flank exhibits a flattening of the power spectrum at MHD scales, attributed to the presence of mirror modes. Wave analysis based on the singular value decomposition method confirms the role of mirror modes in causing spectral flattening. Statistical results reinforce the connection between mirror modes and spectral flattening and reveal a dawn–dusk asymmetry in the distribution of mirror modes.