The metallicity sensitivity of a surface brightness temperature scale
  To obtain the accuracy now sought in the extragalactic distance scale through
standard candles and rulers, calibration of stellar photometry must be
improved. The sensitivity of the V-K color surface brightness relation is
examined here by means of model atmosphere fluxes. It has previously been
neglected, but is shown here to be a significant term in the error budget of a
recent high precision distance of the Large Magellanic Cloud, an anchor in
galaxy distances based on Cepheids.
