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The spectrum of stars in the submillimeter to centimeter wavelength rangeremains poorly constrained due to a lack of data for most spectral types. Anaccurate characterization of stellar emission in this regime is needed to teststellar atmosphere models, and is also essential for revealing emissionassociated with unresolved circumstellar debris. We present ALMA observationsof 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 thesedata to constrain semi-empirical atmospheric models. We discuss the atmosphericstructure of these stars, explore potential short term variability, and thepotential impact on debris disk studies. These results are part of an ongoingcampaign to obtain long wavelength observations of debris-poor stars, entitledMeasuring the Emission of Stellar Atmospheres at Submillimeter/millimeterwavelengths (MESAS).

The MESAS Project: ALMA observations of the F-type stars $\gamma$ Lep, $\gamma$ Vir A, and $\gamma$ Vir B