Can Kepler See Faculae?

We investigate how faculae are manifested in the precision broad-band light curves gathered byKepler from solar-type stars. We show the purely facular signal could easily reveal theirrotation periods, but for stars like the Sun the accuracy of the inferred period from observationsis kept low by short-lived starspots. We find that faculae would have to be twice as bright toovercome this problem. One way to increase the influence of real faculae is to use bluerbandpasses. Otherwise faculae do not affect broad-band differential light curves in ameasurable way, and so are probably not explanatory of other effects found in Kepler lightcurves. This is even more true for TESS differential light curves