Radio Emission from UV Cet: Auroral Emission from a Stellar Magnetosphere

The archetypical flare star UV Cet was observed by MeerKAT on 5-6 October 2021. A large radio outburst with a duration of $\sim\!2$ hr between 886-1682 MHz time resolution 8s and frequency 0.84 MHz, enabling sensitive dynamic spectra to be formed. emission is characterized three peaks containing multitude broadband arcs or partial in the time-frequency domain. In general, are highly right-hand circularly polarized. During end third peak, brief bursts occur that significantly elliptically We present simple model appears broadly consistent characteristics from Cet. Briefly, stellar magnetic field modeled as dipole aligned rotational axis star. mechanism assumed due cyclotron maser instability where x-mode radiation near electron gyrofrequency amplified. While polarized may intrinsic source, rather stringent limits imposed plasma density source along propagation path. suggest instead result reflection an over-dense structure at some distance source. Radio UV~Cet shares both planetary attributes.