We report the discovery of variable radio emission associated with the T Tauri star , V830 Tau , which was recently shown to host a hot Jupiter companion .
Very Large Array observations at a frequency of 6 GHz reveal a detection on 01 May 2011 with a flux density 919 \pm 26 \mu Jy , along with non-detections in two other epochs at < 66 and < 150 \mu Jy .
Additionally , Very Long Baseline Array observations include one detection and one non-detection at comparable sensitivity , demonstrating that the emission is nonthermal in origin .
The emission is consistent with the gyro-synchrotron or synchrotron mechanism from a region with a magnetic field \stackrel { \scriptstyle > } { \scriptstyle \sim } 30 G , and is likely driven by an energetic event such as magnetic reconnection that accelerated electrons .
With the limited data we have , we are not able to place any constraint on the relationship between the radio emission and the rotational or orbital properties of V830 Tau .
This is the first detection of radio emission from a non-degenerate star known to host an exoplanet .