Figure 4.
Slices of the unmodified (left-hand column) and modified (through convolution with the bias factor, as in equation (7), right-hand column) baryon overdensity (top row), peculiar velocity in the x-direction (second row), y-direction (third row), and z-direction (bottom row) in the high-resolution zoom region, of side length 543 h−1 kpc. Each pixel corresponds to a cell width of 1.53 h−1 kpc and the slice has a thickness of one cell width. The effect of applying b(k, vbc), defined in equation (6), can be clearly seen in the baryon overdensity, in that it washes out the small-scale fluctuations. The effect is less pronounced in the peculiar velocities, which are dominated by large-scale modes.