Callingham et al. 2021: "The population of M dwarfs observed at low radio frequencies", Nature Astronomy
Pope et al. 2021: "The TESS View of LOFAR Radio-Emitting Stars", ApJL
Theorists now say that expanded ionospheres of hot Jupiters might self-absorb this emission down to undetectable levels.
Kepler showed us almost all stars have planets - so no point targeting known exoplanets!
Unbiased survey: cross-matching LOFAR Stokes V sources with Gaia DR2 50 pc sample we obtain many matches
... but GJ 1151 is inactive and this emission is steady during the epoch it is detected.
Simulations by Kavanagh et al predict radio emission from planets inside the 'Alfvén surface' (where Alfvén speed > wind speed)
Kavanagh et al lightcurve is consistent with GJ 1151 variability.
Upper limit of 1.2m/s - about an Earth mass in a few day orbit.
With the SKA - hundreds!