086448

The space weather experienced by exoplanets is dictated by conditions present in the corona of the star. X-ray observations measure the coronal base density comma while low- frequency radio emission traces higher comma more tenuous coronal layers. We have recently achieved the first low-frequency detections of M dwarfs comma which we interpret as evidence of star-exoplanet interactions. However comma such an interpretation relies heavily on the measurements of the coronal base density from X-rays. Three of our low-frequency detected M dwarfs are not detected by ROSAT. The proposed observations will allow us to determine whether the radio emission is originating in a star-like atmosphere comma where the emitting electrons are embedded in a corona comma or from a planet-like magnetosphere.