Abstract
ABSTRACT IIDS (Intensified Image Dissector Scanner) spectrophotometry was performed for 16 objects suspected of being highly reddened A-F stars located in a Galactic anticenter field at l = 186 deg and b = -2.5 deg. The stars were classified according to spectral type. Two of the stars appear to be luminous F-type stars having large galactocentric distances (12-30 kpc). These two stars are moderately metal-poor, consistent with an abundance gradient in the Galactic disk of d(Fe/H)dR = -0.08 + or - 0.04/kpc. Supplementary photographic image-tube spectrograms have been used as comparisons in the determination of the stellar calcium abundances. The results of the present investigation indicate that IIDS spectrophotometry can be used to obtain spectral classifications and preliminary abundance measurements for early-type stars.
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