  The spectrum of stars in the submillimeter to centimeter wavelength range
remains poorly constrained due to a lack of data for most spectral types. An
accurate characterization of stellar emission in this regime is needed to test
stellar atmosphere models, and is also essential for revealing emission
associated with unresolved circumstellar debris. We present ALMA observations
of the three nearby, main-sequence, debris-poor, F-type stars $\gamma$ Lep,
$\gamma$ Vir A, and $\gamma$ Vir B at 0.87 and 1.29 millimeters. We use these
data to constrain semi-empirical atmospheric models. We discuss the atmospheric
structure of these stars, explore potential short term variability, and the
potential impact on debris disk studies. These results are part of an ongoing
campaign to obtain long wavelength observations of debris-poor stars, entitled
Measuring the Emission of Stellar Atmospheres at Submillimeter/millimeter
wavelengths (MESAS).
