Distribution of orbital elements for the RR Lyrae stars. Results for stars with [Fe/H ] > -0.95 (left column), [Fe/H ] < 0.95 and Vres < 290 km/s (middle column), and [Fe/H] < -0.95 and Vres > 290 km/s (right column) are shown separately. In the top row, we have plotted normal curves fitting the distributions. In the bottom row, the segmented lines are the reconstructed distributions of RR Lyrae stars in Z (see text for details), and the curves approximate the distributions with exponential laws (the corresponding scale heights are indicated).
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