  Heat-transfer through weakly magnetized diffuse astrophysical plasmas excites
whistlers. This leads to electron whistler resonant scattering, a reduction of
the electron mean-free path, and heat-flux inhibition. However, only whistlers
propagating at a finite angle to the magnetic field (off-axis) can scatter the
heat-flux carrying electrons. Thus, the level of heat flux-inhibition along the
magnetic field lines depends on the presence of off-axis whistlers.
