  Our understanding of stellar atmospheres and our ability to infer
architectures of extrasolar planetary systems rely on understanding the
emission of stars at submillimeter to centimeter wavelengths. In this chapter
we describe how unconstrained stellar emission can interfere with the accurate
characterization of circumstellar debris. The ngVLA is the only facility with
the sensitivity that allows for the observations of a broad range of stellar
spectral types in a feasible amount of time. The observations will enable the
building and testing of accurate models of stellar emission, which in turn are
required for evaluating both the occurrence and abundance of debris over the
proposed wavelength range of the ngVLA
