Sub-Arcsecond Imaging of the Radio Continuum and HI Absorption in the Medusa Merger

We present new MERLIN observations of both the radio continuum and neutral hydrogen absorption against NGC 4194, 'the Medusa Merger', These observations are the highest angular resolution observations, made to date, of the neutral gas within this source. In presenting this new data we discuss the nuclear radio continuum structure of this very efficient starburst galaxy, as well as a further investigation of the dynamics and distribution of HI in the galaxy's nucleus. We conclude by placing these results into the context of other observations of this source, for example high resolution observations of CO emission, with the intention of further understanding the cold neutral and molecular ISM of this source; the fuel for the ongoing starburst.