Conclusions High-redshift, heavily obscured HyLIRGs (i.e., SMGs) are a compelling place to look for a connection between the growth of SMBHs and stellar populations VLBI can resolve out the stellar radio emission, isolating AGN cores An initial search using the EVN has yielded two detections and four upper limits, suggesting the radio emission in SMGs is typically powered by SF rather than an AGN These same models suggest that the SMG phase is not correlated with periods of high AGN activity, nor is the AGN important in driving the submm emission SMGs are heavily obscured HyLIRGs powered primarily by SF, rather than an AGN
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