  We consider rotating charged black holes with a scalar dilaton field and
surrounded by plasma, with the purpose of studying their shadows. The
corresponding metric has been previously obtained in the literature from the
static solution by using the Newman-Janis algorithm. Assuming a well known form
for the pressureless and nonmagnetized plasma distribution, which is suitable
for the separation of the Hamilton-Jacobi equation for light, we derive an
expression that determines the shape of the shadow. We present some examples of
contours and we analyze their observable properties as functions of the charge
and the dilaton coupling. We find that the presence of plasma introduces a
dependency on the frequency, with the shadow becoming smaller as the frequency
decreases.
