| In this paper we provide the first consideration of magnetosphere-ionosphere coupling at
Jupiter-like exoplanets with internal plasma sources such as volcanic moons. We estimate the
radio power emitted by such systems under the condition of near-rigid corotation throughout
the closed magnetosphere, in order to examine the behaviour of the best candidates for
detection with next generation radio telescopes. We thus estimate for different stellar
X-ray-UV (XUV) luminosity cases the orbital distances within which the ionospheric
Pedersen conductance would be high enough to maintain near-rigid corotation, and we then
consider the magnitudes of the large-scale magnetosphere-ionosphere currents flowing within
the systems, and the resulting radio powers, at such distances. We also examine the effects of
two key system parameters, i.e. the planetary angular velocity and the plasma mass outflow
rate from internal sources. In all XUV luminosity cases studied, a significant number of
parameter combinations within an order of magnitude of the jovian values are capable of
producing emissions observable beyond 1Â pc, in most cases requiring exoplanets orbiting
at distances between ~1 and 50Â AU, and for the higher XUV luminosity cases
these observable distances can reach beyond ~50Â pc. The implication of these
results is that the best candidates for detection of such internally-generated radio
emissions are rapidly rotating Jupiter-like exoplanets orbiting stars with high XUV
luminosity at orbital distances beyond ~1Â AU, and searching for such emissions
such may offer a new method of detection of more distant-orbiting exoplanets. |