The metallicity distribution of disk F stars in different age ranges: the left column for the sample of stars within 80 pc around the Sun; the right columnfor the restored complete sample at the solar galactocentric distance with allowance made for the radial metallicity gradient. The numbers indicate the age ranges expressed in billions of years. The abscissa in the right column shows the percentage of such stars in the total restored number of curves represent approximations of the histograms by the tentk power polynomials (left) and by the sums of two Gauss functions (right).discussion in the text | next figure