THE ASTRONOMICAL JOURNAL    VOLUME 113, NUMBER 3, PAGE 1073     MARCH 1997

       CHEMICAL ABUNDANCES OF GALACTIC CEPHEID VARIABLES THAT CALIBRATE
                               THE P-L RELATION

                          A. M. FRY AND B. W. CARNEY

   Department of Physics & Astronomy, University of North Carolina at Chapel
                  Hill, Chapel Hill, North Carolina 27599-3255
      Electronic mail: anne@envy.astro.unc.edu, bruce@sloth.astro.unc.edu

    We have completed spectroscopic studies of 23 Galactic cepheids to
    determine possible metallicity effects on measuring the zero point of
    the P-L relation. We find a spread of 0.4 dex in [Fe/H], which is not
    the result of either observational scatter or of a metallicity gradient
    within the Galactic disk. We find a smaller, less significant spread of
    0.2 dex in [alpha/Fe]. Our results are robust, determined by constancy
    of [Fe/H] derived at differing temperatures throughout the pulsational
    cycle, and abundances of two dwarfs compared to U Sgr in the cluster
    M25. We discuss briefly the effect of metallicity on the P-L
    relation. We also argue that EV Sct and QZ Nor are overtone pulsators,
    and that the latter is not a member of the cluster NGC
    6067. (Copyright) 1997 American Astronomical Society.